Comfort Systems USA
Annual Meeting of Stockholders to be held May 17, 2024.

We are pleased to offer both online proxy voting and proxy materials for our upcoming Annual Meeting of Stockholders. In order to vote through the Internet, you must be a stockholder of Comfort Systems USA as of March 18, 2024 and follow the instructions below.

Voting by Internet
You may use the Internet to transmit your voting instructions and for electronic delivery of information up until 11:59 PM Eastern Time the day before the meeting date as follows:

1. Review the Proxy Materials below;
2. Click this link to go to voteproxy.com;
3. Enter your 11-digit Control Number listed on your Proxy Card; and
4. Cast your vote on the proposals.