UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                            ------------------------

                                   FORM 10-Q

(Mark One)

     [X]  QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15 (D) OF THE
          SECURITIES EXCHANGE ACT OF 1934

                  FOR THE QUARTERLY PERIOD ENDED JUNE 30, 1999

                                       OR

      [ ] TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 (D) OF THE
          SECURITIES EXCHANGE ACT OF 1934

     FOR THE TRANSITION PERIOD FROM _________________ TO __________________

                         COMMISSION FILE NUMBER: 1-13011

                            COMFORT SYSTEMS USA, INC.
             (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)

              DELAWARE                                        76-0526487
    (STATE OR OTHER JURISDICTION                           (I.R.S. EMPLOYER
  OF INCORPORATION OR ORGANIZATION)                      IDENTIFICATION NO.)

                             777 POST OAK BOULEVARD
                                    SUITE 500
                              HOUSTON, TEXAS 77056
               (ADDRESS OF PRINCIPAL EXECUTIVE OFFICES) (ZIP CODE)

       Registrant's telephone number, including area code: (713) 830-9600

     Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15 (d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days.  Yes  [X]   No  [ ]

     The number of shares outstanding of the issuer's common stock, as of August
10, 1999, was 38,901,871.

================================================================================

COMFORT SYSTEMS USA, INC. INDEX TO FORM 10-Q FOR THE QUARTER ENDED JUNE 30, 1999 PAGE ---- Part I -- Financial Information Item 1 -- Financial Statements COMFORT SYSTEMS USA, INC. Introduction to Financial Statements...................... 1 Consolidated Balance Sheets............................... 2 Consolidated Statements of Operations..................... 3 Consolidated Statements of Stockholders' Equity........... 4 Consolidated Statements of Cash Flows..................... 5 Notes to Consolidated Financial Statements................ 6 Item 2 -- Management's Discussion and Analysis of Financial Condition and Results of Operations........................ 12 Part II -- Other Information Item 1 -- Legal Proceedings.......................................... 16 Item 2 -- Recent Sales of Unregistered Securities.................... 16 Item 4 -- Submission of Matters to a Vote of Security Holders........ 16 Item 6 -- Exhibits and Reports on Form 8-K........................... 16 Item 9 -- Changes and Disagreements with Accountants on Accounting and Financial Disclosure................................... 16 Signature............................................................ 17

COMFORT SYSTEMS USA, INC. PART I, ITEM 1 -- FINANCIAL INFORMATION GENERAL INFORMATION INTRODUCTION TO FINANCIAL STATEMENTS Comfort Systems USA, Inc., a Delaware corporation ("Comfort Systems" and collectively with its subsidiaries, the "Company") is a leading national provider of comprehensive heating, ventilation and air conditioning ("HVAC") installation, maintenance, repair and replacement services. Founded in December 1996, the Company is consolidating the fragmented commercial and industrial HVAC markets, and performs most of its services within manufacturing plants, office buildings, retail centers, apartment complexes, and healthcare, education and government facilities. In addition to standard HVAC services, the Company also provides specialized applications such as process cooling, control systems, electronic monitoring and process piping. Certain locations also perform related services such as electrical and plumbing. On July 2, 1997, the Company completed the initial public offering (the "IPO") of its common stock (the "Common Stock") and simultaneously acquired 12 companies (collectively referred to as the "Founding Companies") engaged in providing HVAC services. The Founding Companies had 18 operating locations in 10 states. Subsequent to the IPO, and through June 30, 1999, the Company acquired 98 additional HVAC and complementary businesses (collectively with the Founding Companies, the "Acquired Companies"). Of these additional businesses acquired, 17 were accounted for as poolings-of-interests (the "Pooled Companies"). The remaining businesses acquired were accounted for as purchases (the "Purchased Companies"). The companies acquired subsequent to the IPO added 100 operating locations in 20 additional states. These acquisitions included 21 "tuck-in" operations that have been or are currently being integrated with existing Company operations. Historical interim period results are not necessarily indicative of future results because, among other things, these Acquired Companies were not under common control or management prior to their acquisition by the Company. The Company's results of operations historically have been subject to seasonal fluctuations. These interim statements should be read in conjunction with the historical Consolidated Financial Statements and related notes of Comfort Systems included in the Annual Report on Form 10-K as filed with the Securities and Exchange Commission for the year ended December 31, 1998. 1

COMFORT SYSTEMS USA, INC. CONSOLIDATED BALANCE SHEETS (IN THOUSANDS, EXCEPT SHARE AMOUNTS) DECEMBER 31, JUNE 30, 1998 1999 ------------ ------------ (UNAUDITED) ASSETS CURRENT ASSETS: Cash and cash equivalents....... $ 6,985 $ 4,406 Accounts receivable............. 241,332 285,090 Less -- Allowance.......... 4,758 5,420 ------------ ------------ Accounts receivable, net............... 236,574 279,670 Other receivables............... 2,733 5,045 Inventories..................... 14,768 17,821 Prepaid expenses and other...... 14,264 11,842 Costs and estimated earnings in excess of billings............. 37,228 45,146 ------------ ------------ Total current assets............ 312,552 363,930 PROPERTY AND EQUIPMENT, net.......... 34,413 38,747 GOODWILL, less accumulated amortization of $8,983 and $14,650............................ 430,526 453,862 OTHER NONCURRENT ASSETS.............. 11,802 11,794 ------------ ------------ Total assets.......... $789,293 $868,333 ============ ============ LIABILITIES AND STOCKHOLDERS' EQUITY CURRENT LIABILITIES: Current maturities of long-term debt........................... $ 1,568 $ 796 Current maturities of notes to affiliates and former owners... 7,509 10,106 Accounts payable................ 74,161 89,101 Accrued compensation and benefits....................... 25,869 24,692 Billings in excess of costs and estimated earnings............. 43,968 45,235 Income taxes payable............ 1,299 3,266 Other current liabilities....... 24,788 27,127 ------------ ------------ Total current liabilities....... 179,162 200,323 DEFERRED INCOME TAXES................ 1,124 1,387 LONG-TERM DEBT, NET OF CURRENT MATURITIES......................... 171,039 199,631 NOTES TO AFFILIATES AND FORMER OWNERS, NET OF CURRENT MATURITIES......................... 56,330 57,671 OTHER LONG-TERM LIABILITIES.......... 1,706 1,691 ------------ ------------ Total liabilities..... 409,361 460,703 COMMITMENTS AND CONTINGENCIES........ -- -- STOCKHOLDERS' EQUITY: Preferred stock, $.01 par, 5,000,000 shares authorized, none issued and outstanding.... -- -- Common stock, $.01 par, 102,969,912 shares authorized, 38,141,180 and 38,877,747 shares issued and outstanding, respectively................... 381 389 Additional paid-in capital...... 333,978 340,459 Retained earnings............... 45,573 66,782 ------------ ------------ Total stockholders' equity............ 379,932 407,630 ------------ ------------ Total liabilities and stockholders' equity............ $789,293 $868,333 ============ ============ The accompanying notes are an integral part of these consolidated financial statements. 2

COMFORT SYSTEMS USA, INC. CONSOLIDATED STATEMENTS OF OPERATIONS (IN THOUSANDS, EXCEPT PER SHARE DATA) (UNAUDITED) THREE MONTHS ENDED SIX MONTHS ENDED JUNE 30, JUNE 30, ---------------------- ---------------------- 1998 1999 1998 1999 ---------- ---------- ---------- ---------- REVENUES............................. $ 194,350 $ 341,493 $ 326,958 $ 633,419 COST OF SERVICES..................... 146,646 265,254 247,915 494,002 ---------- ---------- ---------- ---------- Gross profit............... 47,704 76,239 79,043 139,417 SELLING, GENERAL AND ADMINISTRATIVE EXPENSES........................... 30,189 43,333 53,319 88,191 GOODWILL AND OTHER AMORTIZATION...... 1,598 2,883 2,768 5,667 ---------- ---------- ---------- ---------- Operating income........... 15,917 30,023 22,956 45,559 OTHER INCOME (EXPENSE): Interest income................. 188 225 394 392 Interest expense................ (1,611) (4,628) (2,416) (8,816) Other........................... 389 61 112 103 ---------- ---------- ---------- ---------- Other income (expense)..... (1,034) (4,342) (1,910) (8,321) ---------- ---------- ---------- ---------- INCOME BEFORE INCOME TAXES 14,883 25,681 21,046 37,238 PROVISION FOR INCOME TAXES........... 6,465 11,036 9,243 16,029 ---------- ---------- ---------- ---------- NET INCOME........................... $ 8,418 $ 14,645 $ 11,803 $ 21,209 ========== ========== ========== ========== NET INCOME PER SHARE: Basic........................... $ 0.27 $ 0.38 $ 0.39 $ 0.55 ========== ========== ========== ========== Diluted......................... $ 0.26 $ 0.37 $ 0.38 $ 0.54 ========== ========== ========== ========== SHARES USED IN COMPUTING NET INCOME PER SHARE: Basic........................... 31,696 38,734 30,534 38,524 ========== ========== ========== ========== Diluted......................... 32,127 40,644 30,965 40,725 ========== ========== ========== ========== The accompanying notes are an integral part of these consolidated financial statements. 3

COMFORT SYSTEMS USA, INC. CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (IN THOUSANDS, EXCEPT SHARE AMOUNTS) COMMON STOCK ADDITIONAL TOTAL --------------------- PAID-IN RETAINED STOCKHOLDERS' SHARES AMOUNT CAPITAL EARNINGS EQUITY ------------ ------ ---------- --------- ------------ BALANCE AT DECEMBER 31, 1997......... 28,013,436 $ 280 $ 205,829 $ 11,526 $217,635 Issuance of Common Stock: Proceeds of the Second Public Offering...................... 861,479 9 15,892 -- 15,901 Acquisition of Purchased Companies..................... 9,212,573 92 111,456 -- 111,548 Issuance of Employee Stock Purchase Plan shares.......... 29,362 -- 482 -- 482 Issuance of shares for options exercised..................... 24,330 -- 319 -- 319 S Corporation distributions made by certain Pooled Companies........ -- -- -- (966) (966) Net income......................... -- -- -- 35,013 35,013 ------------ ------ ---------- --------- ------------ BALANCE AT DECEMBER 31, 1998......... 38,141,180 381 333,978 45,573 379,932 Issuance of Common Stock: Acquisition of Purchased Companies (unaudited)......... 673,241 7 5,569 -- 5,576 Issuance of Employee Stock Purchase Plan shares (unaudited)................... 55,590 1 849 -- 850 Issuance of shares for options exercised (unaudited)......... 7,736 -- 63 -- 63 Net income (unaudited)............. -- -- -- 21,209 21,209 ------------ ------ ---------- --------- ------------ BALANCE AT JUNE 30, 1999 (unaudited)........................ 38,877,747 $ 389 $ 340,459 $ 66,782 $407,630 ============ ====== ========== ========= ============ The accompanying notes are an integral part of these consolidated financial statements. 4

COMFORT SYSTEMS USA, INC. CONSOLIDATED STATEMENTS OF CASH FLOWS (IN THOUSANDS) (UNAUDITED) SIX MONTHS ENDED JUNE 30, ---------------------- 1998 1999 ---------- ---------- CASH FLOWS FROM OPERATING ACTIVITIES: Net income........................... $ 11,803 $ 21,209 Adjustments to reconcile net income to net cash provided by (used in) operating activities -- Depreciation and amortization expense........................ 5,556 11,033 Bad debt expense................ 327 315 Deferred tax benefit............ (439) (542) Gain on sale of property and equipment...................... (81) (190) Changes in operating assets and liabilities, net of effects of acquisitions of Purchased Companies -- (Increase) decrease in -- Receivables, net...... (21,515) (32,480) Inventories........... (991) (2,219) Prepaid expenses and other current assets............. 3,976 2,508 Costs and estimated earnings in excess of billings........ (4,774) (6,375) Other noncurrent assets............. (623) 1,376 Increase (decrease) in -- Accounts payable and accrued liabilities........ (10,177) 10,647 Billings in excess of costs and estimated earnings........... 2,334 (573) Other, net............ 393 (188) ---------- ---------- Net cash provided by (used in) operating activities.............. (14,211) 4,521 ---------- ---------- CASH FLOWS FROM INVESTING ACTIVITIES: Purchases of property and equipment...................... (4,156) (7,692) Proceeds from sales of property and equipment.................. 310 862 Cash paid for Purchased Companies, net of cash acquired....................... (44,746) (17,202) Other........................... -- (500) ---------- ---------- Net cash used in investing activities.............. (48,592) (24,532) ---------- ---------- CASH FLOWS FROM FINANCING ACTIVITIES: Payments on long-term debt...... (53,421) (100,063) Borrowings of long-term debt.... 98,532 116,582 S Corporation distributions paid by certain Pooled Companies.... (161) -- Proceeds from issuance of common stock.......................... 7,612 913 Other........................... 144 -- ---------- ---------- Net cash provided by financing activities.... 52,706 17,432 ---------- ---------- NET DECREASE IN CASH................. (10,097) (2,579) CASH AND CASH EQUIVALENTS, beginning of period.......................... 18,097 6,985 ---------- ---------- CASH AND CASH EQUIVALENTS, end of period............................. $ 8,000 $ 4,406 ========== ========== The accompanying notes are an integral part of these consolidated financial statements. 5

COMFORT SYSTEMS USA, INC. NOTES TO CONSOLIDATED FINANCIAL STATEMENTS JUNE 30, 1999 (UNAUDITED) 1. BUSINESS AND ORGANIZATION: Comfort Systems USA, Inc., a Delaware corporation ("Comfort Systems" and collectively with its subsidiaries, the "Company"), is a leading national provider of comprehensive heating, ventilation and air conditioning ("HVAC") installation, maintenance, repair and replacement services. Founded in December 1996, the Company is consolidating the fragmented commercial and industrial HVAC markets, and performs most of its services within manufacturing plants, office buildings, retail centers, apartment complexes, and healthcare, education and government facilities. In addition to standard HVAC services, the Company also provides specialized applications such as process cooling, control systems, electronic monitoring and process piping. Certain locations also perform related services such as electrical and plumbing. On July 2, 1997, Comfort Systems completed the initial public offering (the "IPO") of its common stock (the "Common Stock") and simultaneously acquired 12 companies (collectively referred to as the "Founding Companies") engaged in providing HVAC services. The Founding Companies had 18 operating locations in 10 states. Subsequent to the IPO, and through June 30, 1999, the Company acquired 98 additional HVAC and complementary businesses (collectively with the Founding Companies, the "Acquired Companies"). Of these additional businesses acquired, 17 were accounted for as poolings-of-interests (the "Pooled Companies"). The remaining businesses acquired were accounted for as purchases (the "Purchased Companies"). The companies acquired subsequent to the IPO added 100 operating locations in 20 additional states. These acquisitions included 21 "tuck-in" operations that have been or are currently being integrated with existing Company operations. 2. SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES: BASIS OF PRESENTATION These interim statements should be read in conjunction with the historical Consolidated Financial Statements and related notes of Comfort Systems included in the Annual Report on Form 10-K as filed with the Securities and Exchange Commission for the year ended December 31, 1998. There were no significant changes in the accounting policies of the Company during the periods presented. For a description of the significant accounting policies of the Company, refer to Note 2 of Notes to Consolidated Financial Statements of Comfort Systems included in the Company's Annual Report on Form 10-K for the year ended December 31, 1998. The regulations for unaudited interim financial statements such as those in this report allow certain information and footnotes required by generally accepted accounting principles for year end financial statements to be excluded. The Company believes all adjustments necessary for a fair presentation of these interim statements have been included and are of a normal and recurring nature. The results of operations for interim periods are not necessarily indicative of the results for the fiscal year. CASH FLOW INFORMATION Cash paid for interest for the six months ended June 30, 1998 and 1999 was approximately $2.0 million and $7.3 million, respectively. Cash paid for income taxes for the six months ended June 30, 1998 and 1999 was approximately $11.4 million and $14.8 million, respectively. 6

COMFORT SYSTEMS USA, INC. NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED) 3. BUSINESS COMBINATIONS: POOLINGS During 1998, the Company acquired all of the outstanding stock of three of the Pooled Companies in exchange for 1,437,767 shares of Common Stock. These acquisitions have been accounted for as poolings-of-interests as described in Note 2 of Notes to Consolidated Financial Statements of Comfort Systems included in the Annual Report on Form 10-K as filed with the Securities and Exchange Commission for the year ended December 31, 1998. These companies provide HVAC and related services. There were no acquisitions for the six months ended June 30, 1999 which were accounted for as poolings-of-interests. PURCHASES During 1998, the Company acquired 52 of the Purchased Companies. These companies provide HVAC and related services. The aggregate consideration paid in these transactions was $161.2 million in cash, 9,212,573 shares of Common Stock with a market value at the date of acquisition totaling $111.5 million, $57.4 million in the form of convertible subordinated notes and $3.1 million in the form of subordinated notes (collectively the "Notes"). Subsequent to the issuance of certain of the convertible subordinated notes, the Company entered into agreements with certain of the convertible noteholders to modify the terms of $19.5 million of these notes in order to eliminate the provisions relating to convertibility into the Company's Common Stock. The remaining convertible notes are convertible at various dates in 1999, 2000, 2001, and 2002 into 333,157, 987,551, 1,284,098 and 53,655 shares of Common Stock, respectively. Prior to 1998, convertible subordinated notes were issued to certain Purchased Companies and are convertible at various dates in 1999 and 2000 into 121,413 shares of Common Stock. For the three months ended March 31, 1999, Comfort Systems acquired 10 additional companies, which were accounted for as purchase transactions. These companies provide HVAC and related services. The aggregate consideration paid in these transactions was approximately $9.9 million in cash, 381,689 shares of Common Stock with a market value at the date of acquisition totaling $5.6 million, approximately $2.2 million in the form of convertible subordinated notes and $3.3 million in the form of subordinated notes. Subsequent to the issuance of certain of the convertible subordinated notes, the Company entered into agreements with certain of the convertible noteholders to modify the terms of $0.7 million of these notes in order to eliminate the provisions relating to convertibility into the Company's Common Stock. The remaining convertible notes are convertible at various dates in 2000, 2001 and 2002 into 62,276 shares of Common Stock. The allocation of the respective purchase prices to the assets assumed and liabilities acquired resulted in $17.9 million of goodwill related to the companies acquired during the first quarter of 1999. For the three months ended June 30, 1999, Comfort Systems acquired six additional companies, which were accounted for as purchase transactions. These companies provide HVAC and related services. The aggregate consideration paid in these transactions was approximately $8.9 million in cash, 291,552 shares of Common Stock with a market value at the date of acquisition totaling $2.5 million and approximately $5.8 million in the form of subordinated notes. The allocation of the respective purchase prices to the assets assumed and liabilities acquired resulted in $13.2 million of goodwill related to the companies acquired during the second quarter of 1999. The accompanying balance sheets include allocations of the respective purchase prices to the assets acquired and liabilities assumed based on preliminary estimates of fair value and are subject to final adjustment. 7

COMFORT SYSTEMS USA, INC. NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED) The unaudited pro forma data presented below consist of the income statement data presented in these consolidated financial statements plus income statement data for the Purchased Companies as if the acquisitions were effective on January 1, 1998 through the respective dates of acquisitions (in thousands, except per share data): SIX MONTHS ENDED JUNE 30, ---------------------- 1998 1999 ---------- ---------- Revenues............................. $ 623,717 $ 652,767 Net income........................... $ 18,609 $ 20,642 Net income per share -- diluted...... $ 0.48 $ 0.50 Shares used in computing net income per share -- diluted................. 38,730 41,063 Pro forma adjustments included in the preceding table regarding the Acquired Companies primarily relate to (a) certain reductions in salaries and benefits to the former owners (the "Compensation Differential") of the Pooled Companies and Purchased Companies which the former owners agreed would take effect as of the acquisition date, (b) amortization of goodwill related to the Purchased Companies and (c) interest expense on borrowings of $11.8 million that would have been necessary to fund certain S Corporation distributions if they had occurred at the beginning of each period presented. In addition, an incremental tax provision has been recorded as if all applicable Purchased Companies and Pooled Companies which were C Corporations had been subject to federal and state income taxes. The pro forma results presented above are not necessarily indicative of actual results which might have occurred had the operations and management teams of the Company, the Purchased Companies and Pooled Companies been combined at the beginning of the periods presented. 4. LONG-TERM DEBT OBLIGATIONS: Long-term debt obligations consist of the following (in thousands): DECEMBER 31, JUNE 30, 1998 1999 ------------- ---------- (UNAUDITED) Revolving credit facility............ $ 170,700 $ 199,100 Notes to affiliates and former owners............................. 63,839 67,777 Other................................ 1,907 1,327 ------------- ---------- Total debt........................... 236,446 268,204 Less: current maturities............. 9,077 10,902 ------------- ---------- $ 227,369 $ 257,302 ============= ========== REVOLVING CREDIT AGREEMENT In July 1997, the Company entered into a credit agreement with Bank One, Texas, N.A. (the "Credit Facility"). The Credit Facility was amended and restated in September 1997 primarily to provide for additional banks to lend to the Company under the Credit Facility. At that time, the Credit Facility provided the Company with an unsecured revolving line of credit of $75 million. The Credit Facility was further amended in April 1998 and again in December 1998 in order to increase borrowing capacity and to provide for additional banks to lend to the Company under the Credit Facility. The Credit Facility currently provides the Company with a revolving line of credit up to $300 million secured by accounts receivable, inventory and the shares of capital stock of the Company's subsidiaries. The Company currently has a choice of two interest rate options when borrowing under the Credit Facility. Under one option, the interest rate is determined based on the higher of the Federal Funds Rate plus 0.5% or the bank's prime rate. An additional 8

COMFORT SYSTEMS USA, INC. NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED) margin of zero to 1.25% is then added to the higher of these two rates. Under the other interest rate option, borrowings bear interest based on designated short-term Eurodollar rates (which generally approximate LIBOR) plus 1.0% to 2.5%. The additional margin for both options depends on the ratio of the Company's debt to EBITDA. Commitment fees of 0.25% to 0.5% per annum, also depending on the ratio of debt to EBITDA, are payable on the unused portion of the facility. The Credit Facility prohibits the payment of dividends by the Company without the lenders' approval and requires the Company to comply with certain financial covenants. The amended Credit Facility expires on November 1, 2001, at which time all amounts outstanding under the Credit Facility are due. As of June 30, 1999, the Company had borrowed $199.1 million under the Credit Facility at an average interest rate of approximately 6.9% per annum for the first six months of 1999. As of August 10, 1999, $203.0 million was outstanding under this facility. NOTES TO AFFILIATES AND FORMER OWNERS The Notes in the amount of $67.8 million, net of $8.9 million of repayments, referred to above were issued to former owners of certain Purchased Companies as partial consideration of the acquisition purchase price. Of these Notes, $67.2 million bear interest, payable quarterly, at a weighted average interest rate of 5.13% and $36.1 million are convertible by the holder into shares of the Company's Common Stock at a weighted average price of $24.33 per share. The remaining Notes in the amount of $0.6 million are non-interest bearing, and require $0.1 million of principal payments in 1999 with the remaining principal payments due in four equal annual installments beginning in 2000. The terms of the convertible subordinated notes require $0.2 million of principal payments in 1999, $3.2 million of principal payments in 2000, $30.4 million of principal payments in 2001, $1.9 million of principal payments in 2002 and $0.4 million of principal payments in 2003. The terms of the nonconvertible interest-bearing subordinated notes require $2.7 million of principal payments in 1999, $10.1 million of principal payments in 2000, $9.4 million of principal payments in 2001 and $8.9 million of principal payments in 2002. 5. COMMITMENTS AND CONTINGENCIES: CLAIMS AND LAWSUITS The Company is from time to time party to litigation in the ordinary course of business. There are currently no pending legal proceedings that, in management's opinion, would have a material adverse effect on the Company's operating results or financial condition. The Company maintains various insurance coverages in order to minimize financial risk associated with certain claims. The Company has provided accruals for probable losses and legal fees associated with certain of these actions in the accompanying consolidated financial statements. A wholly-owned insurance company subsidiary reinsures a portion of the risk associated with surety bonds issued by a third party insurance company. Because no claims have been made against these financial instruments in the past, management does not expect these instruments will have a material effect on the Company's consolidated financial statements. 6. STOCKHOLDERS' EQUITY: COMMON STOCK AND PREFERRED STOCK During 1998, the Company increased the number of authorized shares of Common Stock to 102,969,912. On June 16, 1998, the Company completed a second public offering (the "Second Public Offering") of 400,000 shares of its Common Stock. The net proceeds from this offering of $7.6 million, after deducting underwriting commissions, were used to repay debt. On July 21, 1998, the underwriters exercised their overallotment option in connection with the Second Public Offering completed in June 1998. An additional 461,479 shares of Common Stock were sold and the net proceeds of $8.8 million, after deducting underwriting commissions, were used to repay debt. 9

COMFORT SYSTEMS USA, INC. NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED) RESTRICTED COMMON STOCK In March 1997, Notre Capital Ventures II, L.L.C. ("Notre") exchanged 2,742,912 shares of Common Stock for an equal number of shares of restricted voting common stock ("Restricted Voting Common Stock"). The holders of Restricted Voting Common Stock are entitled to elect one member of the Company's Board of Directors and 0.55 of one vote for each share on all other matters on which they are entitled to vote. Holders of Restricted Voting Common Stock are not entitled to vote on the election of any other directors. Each share of Restricted Voting Common Stock will automatically convert to Common Stock on a share-for-share basis (i) in the event of a disposition of such share of Restricted Voting Common Stock by the holder thereof (other than a distribution which is a distribution by a holder to its partners or beneficial owners, or a transfer to a related party of such holders (as defined in Sections 267, 707, 318 and/or 4946 of the Internal Revenue Code of 1986, as amended)), (ii) in the event any person acquires beneficial ownership of 15% or more of the total number of outstanding shares of Common Stock of the Company, or (iii) in the event any person offers to acquire 15% or more of the total number of outstanding shares of Common Stock of the Company. After July 1, 1998, the Board of Directors may elect to convert any remaining shares of Restricted Voting Common Stock into shares of Common Stock in the event 80% or more of the originally outstanding shares of Restricted Voting Common Stock have been previously converted into shares of Common Stock. As of June 30, 1999, 722,030 shares of Restricted Voting Common Stock had been converted to shares of Common Stock. EARNINGS PER SHARE In February 1997, the Financial Accounting Standards Board issued SFAS No. 128, "Earnings Per Share." SFAS No. 128 revises the methodology to be used in computing earnings per share ("EPS") such that the computations previously required for primary and fully diluted EPS are to be replaced with "basic" and "diluted" EPS. Basic EPS is computed by dividing net income by the weighted average number of shares of common stock outstanding during the year. Diluted EPS is computed in a similar manner as fully diluted EPS, except that, among other changes, the average share price for the period is used in all cases when applying the treasury stock method to potentially dilutive outstanding options. Diluted EPS is also computed by adjusting both net earnings and shares outstanding as if the conversion of the convertible subordinated notes occurred on the first day of the year. The after tax interest expense related to the assumed conversion of the convertible subordinated notes during the three months and six months ended June 30, 1999 was $274,000 and $703,000, respectively. The effect of the assumed conversion of the convertible subordinated notes during the first six months of 1998 was antidilutive. 10

COMFORT SYSTEMS USA, INC. NOTES TO CONSOLIDATED FINANCIAL STATEMENTS -- (CONTINUED) The following table summarizes weighted average shares outstanding for each of the periods presented (in thousands): THREE MONTHS ENDED SIX MONTHS ENDED JUNE 30, JUNE 30, -------------------- -------------------- 1998 1999 1998 1999 --------- --------- --------- --------- Shares issued in connection with the acquisitions of the Founding Companies.......................... 9,721 9,721 9,721 9,721 Shares sold pursuant to the IPO...... 6,100 6,100 6,100 6,100 Shares held by Notre, management and consultants........................ 4,240 4,240 4,240 4,240 Shares issued in connection with the acquisitions of the Pooled Companies.......................... 5,946 5,946 5,946 5,946 Weighted average shares issued in connection with the underwriter's overallotment...................... 915 1,376 915 1,376 Weighted average shares issued in connection with the acquisitions of the Purchased Companies............ 4,722 10,840 3,586 10,640 Weighted average shares sold in the Second Public Offering............. 52 400 26 400 Weighted average portion of shares issued in connection with the Employee Stock Purchase Plan....... -- 85 -- 76 Weighted average portion of shares issued in connection with the exercise of stock options.......... -- 26 -- 25 --------- --------- --------- --------- Weighted average shares outstanding -- Basic............... 31,696 38,734 30,534 38,524 Weighted average portion of shares related to stock options under the treasury stock method.............. 431 286 431 223 Weighted average shares related to the issuance of convertible notes.............................. -- 1,624 -- 1,978 --------- --------- --------- --------- Weighted average shares outstanding -- Diluted............. 32,127 40,644 30,965 40,725 ========= ========= ========= ========= 11

COMFORT SYSTEMS USA, INC. ITEM 2. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS INTRODUCTION The following discussion should be read in conjunction with the consolidated historical and pro forma combined financial statements of the Company and related notes thereto included elsewhere in this Form 10-Q and the Annual Report on Form 10-K for the year ended December 31, 1998 (the "Form 10-K"). This discussion contains forward-looking statements regarding the business and industry of Comfort Systems within the meaning of the Private Securities Litigation Reform Act of 1995. These statements are based on the current plans and expectations of the Company and involve risks and uncertanties that could cause actual future activities and results of operations to be materially different from those set forth in the forward-looking statements. Important factors that could cause actual results to differ include risks set forth in "Factors Which May Affect Future Results," included in the Form 10-K. The Company is a leading national provider of comprehensive HVAC installation, maintenance, repair and replacement services. Founded in December 1996, the Company is consolidating the fragmented commercial and industrial HVAC markets, and performs most of its services within manufacturing plants, office buildings, retail centers, apartment complexes, and healthcare, education and government facilities. In addition to standard HVAC services, the Company also provides specialized applications such as process cooling, control systems, electronic monitoring and process piping. Certain locations also perform related services such as electrical and plumbing. On July 2, 1997, the Company completed the IPO and simultaneously acquired the 12 Founding Companies, which are engaged in providing HVAC services. Subsequent to the IPO, and through June 30, 1999, the Company acquired 98 additional HVAC and complementary businesses. Of these additional businesses, 17 were accounted for as poolings-of-interests and the remaining businesses were accounted for as purchases. The consolidated historical financial statements of the Company have been retroactively restated to give effect to the operations of the Pooled Companies. Historical results are not necessarily indicative of future results of the Company because, among other things, the Acquired Companies were not under common control or management prior to their acquisition. The results of the Company have historically been subject to seasonal fluctuations. The timing and magnitude of acquisitions, assimilation costs and the seasonal nature of the HVAC industry may materially affect operating results. Accordingly, the operating results for any period are not necessarily indicative of the results that may be achieved for any subsequent period. These historical statements of operations should be read in conjunction with the historical Consolidated Financial Statements and related notes of Comfort Systems, filed herewith, and the additional information and the respective financial statements and related notes of Comfort Systems included in the Annual Report on Form 10-K as filed with the Securities and Exchange Commission for the year ended December 31, 1998. 12

RESULTS OF OPERATIONS -- HISTORICAL (IN THOUSANDS) THREE MONTHS ENDED SIX MONTHS ENDED JUNE 30, JUNE 30, ------------------------------------------ ------------------------------------------ 1998 1999 1998 1999 -------------------- -------------------- -------------------- -------------------- Revenues............................. $ 194,350 100.0% $ 341,493 100.0% $ 326,958 100.0% $ 633,419 100.0% Cost of services..................... 146,646 75.5 265,254 77.7 247,915 75.8 494,002 78.0 --------- --------- --------- --------- --------- --------- --------- --------- Gross profit......................... 47,704 24.5 76,239 22.3 79,043 24.2 139,417 22.0 Selling, general and administrative expenses............................ 30,189 15.5 43,333 12.7 53,319 16.3 88,191 13.9 Goodwill amortization................ 1,598 0.8 2,883 0.8 2,768 0.8 5,667 0.9 --------- --------- --------- --------- --------- --------- --------- --------- Operating income..................... 15,917 8.2 30,023 8.8 22,956 7.0 45,559 7.2 Other income (expense)............... (1,034) (0.5) (4,342) (1.3) (1,910) (0.6) (8,321) (1.3) --------- --------- --------- --------- --------- --------- --------- --------- Income before taxes.................. 14,883 7.7 25,681 7.5 21,046 6.4 37,238 5.9 Provision for income taxes........... 6,465 -- 11,036 -- 9,243 -- 16,029 -- --------- --------- --------- --------- --------- --------- --------- --------- Net income........................... $ 8,418 4.3% $ 14,645 4.3% $ 11,803 3.6% $ 21,209 3.3% ========= ========= ========= ========= ========= ========= ========= ========= REVENUES -- Revenues increased $147.1 million, or 75.7%, to $341.5 million for the second quarter of 1999 and increased $306.5 million, or 93.7%, to $633.4 million for the first six months of 1999, compared to the same periods in 1998. The increase in revenues was primarily due to the acquisition of Purchased Companies. GROSS PROFIT -- Gross profit increased $28.5 million, or 59.8%, to $76.2 million for the second quarter of 1999 and increased $60.4 million, or 76.4%, to $139.4 million for the first six months of 1999, compared to the same periods in 1998. This increase was primarily due to the acquisitions described above. As a percentage of revenues, gross profit decreased from 24.5% for the three months ended June 30, 1998 to 22.3% for the three months ended June 30, 1999 and from 24.2% for the first six months of 1998 to 22.0% for the first six months of 1999. This decrease primarily resulted from the reclassification of certain costs from selling, general and administrative expenses to cost of services. These costs relate to activities that directly support project or service work. This reclassification better aligns the presentation of cost of services and selling, general and administrative expenses across all of our acquired operations. Excluding the effect of this reclassification for the three months and six months ended June 30, 1999 of approximately $7.9 million and $13.7 million, respectively, gross profit as a percentage of revenues increased from 24.5% to 24.7% for the second quarter of 1999 and was unchanged from the first six months of 1998 at 24.2% for the first six months of 1999. SELLING, GENERAL AND ADMINISTRATIVE EXPENSES ("SG&A") -- SG&A increased $13.1 million, or 43.5%, to $43.3 million for the second quarter of 1999 and increased $34.9 million, or 65.4%, to $88.2 million for the first six months of 1999, compared to the same periods in 1998. Most of this increase was related to Purchased Companies acquired subsequent to second quarter 1998 along with an increase in corporate personnel and corporate office expenses commensurate with the increase in the number of Acquired Companies. As a percentage of revenues, selling, general and administrative expenses decreased from 15.5% for the three months ended June 30, 1998 to 12.7% for the three months ended June 30, 1999 and from 16.3% for the first six months of 1998 to 13.9% for the first six months of 1999. This decrease is primarily attributable to the reclassification of costs as described above. Excluding the effect of this reclassification for the three months and six months ended June 30, 1999 of approximately $7.9 million and $13.7 million, respectively, SG&A expenses as a percentage of revenues decreased from 15.5% to 15.0% for the second quarter of 1999 and decreased from 16.3% to 16.1% for the first six months of 1999. This decrease in SG&A as a percentage of revenues resulted from increased volume without a commensurate increase in overhead. SG&A for the second quarter of 1998 and the first six months of 1998 includes $1.1 million of salaries and benefits paid to the former owners of the Pooled Companies which the former owners contractually agreed would not continue following their acquisition by Comfort Systems. OPERATING INCOME -- Operating income increased $14.1 million, or 88.6%, to $30.0 million for the second quarter of 1999 and increased $22.6 million, or 98.5%, to $45.6 million for the first six months of 13

1999, compared to the same periods in 1998. This increase was primarily due to the addition of Purchased Companies. As a percentage of revenues, operating income increased from 8.2% for the three months ended June 30, 1998 to 8.8% for the three months ended June 30, 1999, and increased from 7.0% for the six months ended June 30, 1998 to 7.2% for the six months ended June 30, 1999. The increase in operating income as a percentage of revenues resulted from strong performance on projects in the industrial and process markets in the Midwest and San Diego, an improvement in pricing on multi-unit installation projects and synergies achieved between our western Michigan companies. OTHER INCOME (EXPENSE) -- Other expense, net, increased to $4.3 million and $8.3 million for the three months and six months ended June 30, 1999 primarily due to the increase in interest expense related to the acquisition of Purchased Companies subsequent to the second quarter of 1998. LIQUIDITY AND CAPITAL RESOURCES -- HISTORICAL For the six months ended June 30, 1999, net cash provided by operating activities was $4.5 million primarily due to an increase in accounts payable and accrued liabilities of $10.6 million. Cash used in operating activities for the six months ended June 30, 1998 was $14.2 million, primarily as a result of a decrease in accounts payable and accrued liabilities and an increase in accounts receivable. Cash used in investing activities was $24.5 million for the six months ended June 30, 1999, primarily in connection with the acquisition of Purchased Companies for $17.2 million, net of cash acquired. Cash used in investing activities for the six months ended June 30, 1998 was $48.6 million, primarily for the acquisition of Purchased Companies. Cash provided by financing activities for the six months ended June 30, 1999 was $17.4 million and was primarily attributable to net borrowings of long-term debt of $16.5 million, which were primarily used to fund acquisitions. Net cash provided by financing activities for the six months ended June 30, 1998 was $52.7 million and was primarily attributable to net borrowings of long-term debt related to the acquisition of Purchased Companies. In July 1997, the Company entered into a credit agreement with Bank One, Texas, N.A. (the "Credit Facility"). The Credit Facility was amended and restated in September 1997 primarily to provide for additional banks to lend to the Company under the Credit Facility. At that time, the Credit Facility provided the Company with an unsecured revolving line of credit of $75 million. The Credit Facility was further amended in April 1998 and again in December 1998 in order to increase borrowing capacity and to provide for additional banks to lend to the Company under the Credit Facility. The Credit Facility currently provides the Company with a revolving line of credit up to $300 million secured by accounts receivable, inventory and the shares of capital stock of the Company's subsidiaries. The Company currently has a choice of two interest rate options when borrowing under the Credit Facility. Under one option, the interest rate is determined based on the higher of the Federal Funds Rate plus 0.5% or the bank's prime rate. An additional margin of zero to 1.25% is then added to the higher of these two rates. Under the other interest rate option, borrowings bear interest based on designated short-term Eurodollar rates (which generally approximate LIBOR) plus 1.0% to 2.5%. The additional margin for both options depends on the ratio of the Company's debt to EBITDA. Commitment fees of 0.25% to 0.5% per annum, also depending on the ratio of debt to EBITDA, are payable on the unused portion of the facility. The Credit Facility prohibits the payment of dividends by the Company without the lenders' approval and requires the Company to comply with certain financial covenants. The amended Credit Facility expires on November 1, 2001, at which time all amounts outstanding under the Credit Facility are due. As of June 30, 1999, the Company had borrowed $199.1 million under the Credit Facility at an average interest rate of approximately 6.9% per annum for the first six months of 1999. As of August 10, 1999, $203.0 million was outstanding under this facility. The Company anticipates that available borrowings under its Credit Facility and cash flow from operations will provide cash in excess of the Company's normal working capital and capital expenditure needs, debt service requirements and additional acquisition opportunities. Should the Company accelerate or revise its acquisition program, the Company may need to seek additional financing through the public or 14

private sale of equity or debt securities or increase its Credit Facility. There can be no assurance that the Company will secure such financing if and when it is needed, or that such financing will be available on terms that the Company deems acceptable. YEAR 2000 Computers, software, and other equipment utilizing embedded technology that use only two digits to identify a year in a date field may be unable to accurately process certain date-based information at or after the year 2000. This is commonly referred to as the "Year 2000 issue." The Company has implemented a Year 2000 program and is using both internal and external resources to assess and replace or reprogram computers, software and other equipment as needed. Key areas of the Company's operations that are being addressed include external customers, external suppliers and internal computers, software and potential back-up and contingency plans. Year 2000 considerations may have an effect on some of the Company's customers and suppliers, and thus indirectly on the Company. If the Company's vendors or suppliers of the Company's necessary dispatching, power, telecommunications, transportation and financial services fail to provide the Company with equipment and service, the Company will be unable to provide services to its customers. If any of these uncertainties were to occur, the Company's business, financial condition and results of operations could be materially adversely affected. The Company is studying the potential effect on the Company with respect to customers and suppliers with Year 2000 issues and does not currently expect a material effect on the Company's financial condition or results of operations at this time. The Company's initial assessment identified Year 2000 issues within the Company's operating systems. The total cost of anticipated Year 2000 enhancements is approximately $800,000 and is being funded from operating cash flows. The majority of such costs is for the acquisition of hardware and software and will be capitalized. The remaining costs will be expensed as incurred and are not expected to have a material effect on the results of operations. The Company expects, but cannot be certain, that it will be substantially complete with Year 2000 enhancements for internal operating systems by November 1999. The ability of third parties with which the Company transacts business to adequately address Year 2000 issues is outside of the Company's control. There can be no assurance that the failure of the Company, or such third parties, to adequately address their respective Year 2000 issues will not have a material adverse effect on the Company's financial condition or results of operations. Accordingly, as part of the Year 2000 program, contingency plans are being assessed and developed to respond to any failures as they may occur. At this time, the Company does not expect that any failure of the Company or third parties to achieve Year 2000 compliance will adversely affect the Company. SEASONALITY AND CYCLICALITY The HVAC industry is subject to seasonal variations. Specifically, the demand for new installation and replacement is generally lower during the winter months due to reduced construction activity during inclement weather and less use of air conditioning during the colder months. Demand for HVAC services is generally higher in the second and third calendar quarters due to increased construction activity and increased use of air conditioning during the warmer months. Accordingly, the Company expects its revenues and operating results generally will be lower in the first and fourth calendar quarters. Historically, the construction industry has been highly cyclical. As a result, the Company's volume of business may be adversely affected by declines in new installation projects in various geographic regions of the United States. 15

COMFORT SYSTEMS USA, INC. PART II--OTHER INFORMATION ITEM 1. LEGAL PROCEEDINGS The Company is involved in various legal proceedings that have arisen in the ordinary course of business. The Company does not believe that any of these proceedings will have a material adverse effect on the financial position or results of operations of the Company. ITEM 2. RECENT SALES OF UNREGISTERED SECURITIES During the three month period ended June 30, 1999, the Company issued 122,539 unregistered shares of its Common Stock in connection with the acquisition of two Purchased Companies. These shares were issued under the Securities Act in reliance on the exemption provided by Section 4(2), no public offering being involved. ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS The Company held its annual meeting of stockholders in Houston, Texas on May 20, 1999. The following sets forth matters submitted to a vote of the stockholders: (a) The following individuals were elected to the Board of Directors as stated in the Company's Proxy Statement dated April 27, 1999, for terms expiring at the 2002 annual stockholders' meeting or until their successors have been elected and qualified -- Class II Directors: Thomas J. Beaty, J. Gordon Beittenmiller, Larry Martin, Michael Nothum, Jr. and John C. Phillips. Every director was elected by more than a majority of the outstanding shares of Common Stock of the Company. Mr. Beaty had 24,680,160 shares voted in favor, with 65,407 shares withheld, Mr. Martin had 24,565,938 shares voted in favor, with 179,638 shares withheld, and each of the remaining directors had 24,680,253 shares voted in favor, with 65,323 shares withheld. ITEM 6. EXHIBITS AND REPORTS ON FORM 8-K (a) Exhibits 27.1 -- Financial Data Schedule. (Filed herewith) (b) Reports on Form 8-K None. ITEM 9. CHANGES AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE None. 16

SIGNATURE PURSUANT TO THE REQUIREMENTS OF THE SECURITIES EXCHANGE ACT OF 1934, THE REGISTRANT HAS DULY CAUSED THIS REPORT TO BE SIGNED ON ITS BEHALF BY THE UNDERSIGNED THEREUNTO DULY AUTHORIZED. COMFORT SYSTEMS USA, INC. By:/s/ J. GORDON BEITTENMILLER J. GORDON BEITTENMILLER EXECUTIVE VICE PRESIDENT, CHIEF FINANCIAL OFFICER AND DIRECTOR Dated: August 13, 1999 17

  

5 THE FINANCIAL DATA SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM FORM 10-Q FOR THE THREE MONTHS ENDED JUNE 30, 1999 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH FINANCIAL STATEMENTS. 1,000 6-MOS DEC-31-1999 JUN-30-1999 4,406 0 285,090 5,420 17,821 363,930 89,379 (50,632) 868,333 200,323 257,302 0 0 389 407,241 868,333 633,419 633,419 494,002 494,002 93,543 315 8,816 37,238 16,029 21,209 0 0 0 21,209 0.55 0.54