Comfort Systems USA Announces Fourth Quarter 2008 Conference Call

Comfort Systems USA, Inc. (NYSE: FIX), a leading provider of commercial, industrial and institutional heating, ventilation and air conditioning (“HVAC”) services, announces that it has scheduled its quarterly conference call for Friday, February 27, 2009 at 10:00 a.m. Central Time to discuss fourth quarter 2008 financial results. The results will be released after the market closes on Thursday, February 26, 2009.

To participate in the call, dial 1-888-680-0869 fifteen minutes before the conference call begins and enter 12601486 as the conference passcode. Participants may pre-register for the call at https://www.theconferencingservice.com/prereg/key.process?key=PJ3NP9KCY. Pre-registrants will be issued a pin number to use when dialing into the live call which will provide quick access to the conference by bypassing the operator upon connection.

A replay of the entire call will be available until 6:00 p.m. Central Time, Friday, March 6, 2009 by calling 1-888-286-8010 with the conference passcode of 90507250.

The call can also be accessed on the Company’s website at http://www.comfortsystemsusa.com under the Investor tab. A replay of the call will also be available on the Company’s website.

Comfort Systems USA is a premier provider of business solutions addressing workplace comfort, with more than 74 locations in 67 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.