News

Houston, TX – November 5, 2003 – Comfort Systems USA, Inc. (NYSE: FIX), a leading provider of commercial/industrial heating, ventilation and air conditioning (“HVAC”) services, announced that it has scheduled its quarterly conference call for Wednesday, November 12, 2003 at 10:00 a.m. Central Time to discuss third quarter 2003 financial results. The results will be released before the market opens on Wednesday morning.

To participate in the call, dial 1-630-395-0024 ten minutes before the conference call begins and ask for the Comfort Systems USA conference. A replay of the entire call will be available until 6:00 p.m. Central Time, Wednesday, November 19, 2003 by calling 1-402-998-1545.

Comfort Systems USA is a premier provider of business solutions addressing workplace comfort, environments, processes and energy services, with more than 84 locations in 57 cities around the nation. For more information, visit the Company's website at www.comfortsystemsusa.com.

Certain statements and answers to questions during the call may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These statements are based on the current plans and expectations of Comfort Systems USA, Inc. and involve risks and uncertainties 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 detailed in the Company's reports filed with the Securities and Exchange Commission.