Press Release

Comfort Systems USA Energy Services - January 20, 2010

Contact: Andrea Gross
Phone: 8602858312

Comfort Systems USA Energy Services Receives Qualification for the Department of Energy’s Qualified List of Energy Services Companies
Deemed capable of quality energy service for federal agencies

WINDSOR, Conn. –January 20, 2010–Effective immediately, Comfort Systems USA Energy Services, a subsidiary of Comfort Systems USA (NYSE: FIX), the premier provider of business solutions addressing workplace comfort, is pleased to announce that they have received qualification for the United States Department of Energy’s (DOE) Qualified List of Energy Services companies (ESCOs).

Inclusion into this well recognized group of energy services companies means Comfort Systems USA Energy Services may compete for advertised federal energy savings performance contracts (ESPCs). The Energy Policy Act of 1992 (EPAct) directed the Department of Energy to develop methods and procedures to bring energy savings performance contracts into the mainstream of federal procurement.

About the United States Department of Energy

The Department of Energy's overarching mission is to advance the national, economic, and energy security of the United States; to promote scientific and technological innovation in support of that mission; and to ensure the environmental cleanup of the national nuclear weapons complex.

About Comfort Systems USA

Comfort Systems USA(R) is a premier provider of business solutions addressing workplace comfort, with 74 locations in 59 cities around the nation. For more information, visit the Company's website at www.comfortsystemsusa.com.

This press release contains 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, among others, national or regional weakness in non-residential construction activity, difficulty in obtaining or increased costs associated with bonding, shortages of labor and specialty building materials, the use of incorrect estimates for bidding a fixed price contract, undertaking contractual commitments that exceed our labor resources, retention of key management, the Company's backlog failing to translate into actual revenue or profits, errors in the Company's percentage of completion method of accounting, the result of competition in the Company's markets, seasonal fluctuations in the demand for HVAC systems, the imposition of past and future liability from environmental, safety, and health regulations including the inherent risk associated with self-insurance, adverse litigation results and other risks detailed in the Company's reports filed with the Securities and Exchange Commission. Important factors that could cause actual results to differ are discussed under "Item 1A. Company Risk Factors" in the Company's Annual Report on Form 10-K for the year ended December 31, 2007. These forward-looking statements speak only as of the date of this release. Comfort Systems USA, Inc. expressly disclaims any obligation or undertaking to release publicly any updates or revisions to any forward-looking statement contained herein to reflect any change in Comfort Systems USA, Inc.'s expectations with regard thereto or any change in events, conditions or circumstances on which any such statement is based.
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