8-K

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 OR 15(d) of The Securities Exchange Act of 1934

Date of Report (Date of earliest event reported)  March 3, 2009

Comfort Systems USA, Inc.

(Exact name of registrant as specified in its charter)

Delaware	1-13011	76-0526487
(State or other jurisdiction	(Commission	(IRS Employer
of incorporation)	File Number)	Identification No.)
777 Post Oak Boulevard, Suite 500Houston, Texas		77056
(Address of principal executive offices)		(Zip Code)

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

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

o  Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

o  Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

o  Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

o  Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

ITEM  7.01  REGULATION FD DISCLOSURE.

On the 3rd day of March, 2009, Comfort Systems USA, Inc., a Delaware corporation (the “Company”), a leading provider of commercial/industrial heating, ventilation and air conditioning services, posted to the “Investor” section of its Internet website (www.comfortsystemsusa.com) an investor presentation slideshow.  The Company intends to use this presentation in making presentations to analysts, potential investors, and other interested parties.

The information included in the investor presentation includes financial information determined by methods other than in accordance with accounting principles generally accepted in the United States of America (“GAAP”).  The Company’s management uses these non-GAAP measures in its analysis of the Company’s performance.  The Company believes that the presentation of certain non-GAAP measures provides useful supplemental information that is essential to a proper understanding of the operating results of the Company’s core businesses.  These non-GAAP disclosures should not be viewed as a substitute for operating results determined in accordance with GAAP, nor are they necessarily comparable to non-GAAP performance measures that may be presented by other companies.

The information in this Form 8-K being furnished under Item 7.01 shall not be deemed to be “filed” for the purposes of Section 18 of the Securities and Exchange Act of 1934 (the “Exchange Act”), or otherwise subject to the liabilities of such section, nor shall such information be deemed incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing.  The investor presentation contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995.  These statements are based on the Company’s expectations and involve risks and uncertainties that could cause the Company’s actual results to differ materially from those set forth in the statements.  These risks are discussed in the Company’s filings with the Securities and Exchange Commission, including an extensive discussion of these risks in the Company’s Annual Report on Form 10-K for the year ended December 31, 2008.

A copy of the presentation is furnished herewith as Exhibit 99.1

Item 9.01               Financial Statements and Exhibits

The following Exhibits are included herein:

Exhibit 99.1 Slideshow presentation dated March 3, 2009.

SIGNATURES

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 hereunto duly authorized.

By:	/s/ Trent T. McKenna
	Trent T. McKenna, Vice President and General Counsel

Date:       March 3, 2009

2

EXHIBIT INDEX

Exhibit Number	Exhibit Title or Description
99.1	Slideshow presentation dated March 3, 2009

3

EX-99.1

Exhibit 99.1

As of March 3, 2009

This presentation 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 future events 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, the use of incorrect estimates for bidding a fixed-price contract, undertaking contractual commitments that exceed our labor resources, failing to perform contractual obligations efficiently enough to maintain profitability; national or regional weakness in construction activity and economic conditions, financial difficulties affecting projects, vendors, customers, or subcontractors, difficulty in obtaining or increased costs associated with bonding and insurance, shortages of labor and specialty building materials, retention of key management, our backlog failing to translate into actual revenue or profits, errors in our percentage-of-completion method of accounting, the result of competition in our markets, seasonal fluctuation 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 our reports filed with the Securities and Exchange Commission. A further list and description of these risks, uncertainties and other factors are discussed under “Item 1A. Company Risks Factors” in the Company’s Annual Report on Form 10-K for the year ended December 31, 2008. These forward-looking statements speak only as of the date of this filing. 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 our expectations with regard thereto or any change in events, developments, conditions or circumstances on which an such statement is based. Safe Harbor Statement

To be the nation’s premier HVAC and mechanical systems installation and services provider. Vision

Mission To provide the best value HVAC and mechanical systems installation and service, principally in the mid-market commercial, industrial, and institutional sectors, while caring for our customers, employees and the environment and realizing superior returns for our stockholders.

Act with honesty and integrity. Show respect for all stakeholders. Exceed customer expectations. Seek “win-win” solutions. Demonstrate spirit, drive, and teamwork. Pursue innovation. Achieve premier safety performance. Commit to energy efficiency. Communicate openly and often. Impact our communities positively. Values

Comfort Systems USA National Commercial, Industrial, Institutional HVAC/Piping/Plumbing Strong balance sheet Substantial continuing growth 57% new construction; 43% service, repair, retrofit Revenue run rate $1.3 billion

Comfort Today Over $20M $10M - $20M Under $10M Comfort Systems USA National Accounts ANNUAL REVENUES Region 3 Region 1 Region 2

What We Do Commercial HVAC Quality People. Building Solutions. Piping Service, Repair, Retrofit Applied Systems

Long Term Industry Growth The Dodge Index for Nonresidential Building Construction 2000=100 Building comfort a “necessity” Mechanical equipment – requires service, repair, replacement Increasing technical content and building automation Energy efficiency and IAQ emerging Outsourcing Commercial, Industrial, Institutional HVAC – A $40B+ Industry DRIVERS 4% 80 100 120 140 160 180 200 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008

Industry Trend Toward Service & Replacement (Recurring Revenue) 5+ million commercial buildings (DOE) Recurring service 20 year replacement cycle “Inventory” of future business OEMs note significant deferred maintenance & replacement over recent years Source: The Trane Company NEW CONSTRUCTION 70% 30% 0% 50% 100% 1980 Share of Industry Revenues Time 70% 30% SERVICE & REPLACEMENT

13% 30% 57% Revenues by Activity New Construction/ Installation Replacement Service and Maintenance 2008

PROJECT SIZE # OF PROJECTS (As of December 31, 2008) Diverse Project Mix Average Project Size $475,000 Average Project Length 6-9 months Value of Projects >$1M $1,451.5M Value of Projects <$1M $572.5M 3,942 262 64 18 8 TOTAL PROJECTS = 4,294 0 2,000 4,000 0-1M 1-5M 5-10M 10-15M 15+M

Healthcare Education Government Manufacturing Office Building Multi-Family Retail/Restaurants Distribution Other Residential 17% 11% 12% 13% 14% 8% 1% 13% 1% 2% Top Ten Customers Diverse End-Use Base Served by 12 different Comfort operating units Largest customer = less than 3% of revenues Lodging & Entertainment 2008 3% 5% Religious & Not-for-Profit

Diverse End-Use Base Omni Orlando Resort at Championsgate Orlando, Florida Navy Federal Credit Union Pensacola, Florida University Hospital Little Rock, Arkansas University United Methodist Church Syracuse, New York

Competitive Advantages High quality operations Ability to leverage and proliferate technical expertise Ability to collaborate on large jobs and share labor Energy efficiency services National multi-location service capability Purchasing economics Bonding and insurance

Financial Overview

Capital Structure Management 820 1057 900 400 300 200 $ Debt Debt –– EBITDA 0.6 346 275 205 15 10 4.0 3.0 2.0 1.0 3.6 3.9 2.7 0.7 9 0.3 0.0 0.0 History – Financial Nonresidential Construction Spending (FW Dodge) 9/11/01 Dec 06 0.0 0 100 0 May 00 Dec 00 Dec 01 Dec 02 Dec 03 Dec 04 Dec 05 0 Sale of Assets 1110 Dec 07 0.03 0 .12 Dec 08 298 854 1,370 1,591 1,546 819 785 820 900 1,057 1,110 1,329 Revenues Sale of Assets Acquisition Phase and Industry Growth $ Revenue 80 100 120 140 160 180 200 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 0 500 1,000 1,500 2,000 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008

Backlog (in millions) Note: Excludes all divested and discontinued operations 726.7 690.0 678.9 653.8 700.5 720.0 818.5 786.7 811.3 780.2 804.7 680.6 752.4 $0 $200 $400 $600 $800 $1,000 Dec-05 Mar-06 Jun-06 Sep-06 Dec-06 Mar-07 Jun-07 Sep-07 Dec-07 Mar-08 Jun-08 Sep-08 Dec-08

Safe employees Valued by customers Lost time injury rate is 60% less than industry average WC claims cost per payroll dollar down from 3.5% to 0.9% We can build a culture OSHA Recordable Rate Source: Bureau of Labor Statistics, Standard Industry Classification (SIC) Code 20 1710 – Specialty Trades Contractors – HVAC and Plumbing & North American Industry Classification System (NAICS) Code 23822 Safety 46% Difference 20% Difference Industry Average Comfort Systems USA Our safety record is no accident. 0.0 5.0 10.0 15.0 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008

 4Q YTD 4Q 08 07 08 07 Financial Profile Revenues $ 329.0 $293.3 $1,328.5 $1,109.5 Adjusted EBITDA $ 23.3 $ 15.1 $ 91.8 $ 56.8 % Revenue 7.1% 5.1% 6.9% 5.1% Operating Income $ 20.1 $ 13.1 $ 79.4 $ 49.9 % Revenue 6.1% 4.5% 6.0% 4.5% Net Income $ 12.5 $ 8.7 $ 49.7 $ 32.5 % Revenue 3.8% 3.0% 3.7% 2.9% Diluted EPS $ 0.32 $ 0.21 $ 1.24 $ 0.79 Free Cash Flow $ 32.1 $ 54.9 $ 68.9 $ 72.8 Debt $ 10.7 $ 1.5 Cash $ 117.0 $ 139.6 Backlog $ 752.4 $ 786.7

Revenues Revenues for the twelve months ended December 31, 2008 were $1,328.5 million. Revenues (in millions) $0 $100 $200 $300 $400 $500 $600 $700 $800 $900 $1,000 $1,100 $1,200 $1,300 $1,400 $1,500 2004 2005 2006 2007 2008

Operating Margins (a) Annual Operating Margin (a) This table includes non-GAAP financial information as the information provided excludes goodwill impairment charges of $0.6 million and $33.9 million for 2004 and 2005, respectively. No goodwill impairment charge was recorded for 2006, 2007 or 2008. 0% 1% 2% 3% 4% 5% 6% 7% 2004 2005 2006 2007 2008

Adjusted EBITDA – Continuing Operations $25.5 (millions) $39.3 $49.6 $56.8 $91.8 $0 $10 $20 $30 $40 $50 $60 $70 $80 $90 $100 2004 2005 2006 2007 2008

Strong Cash Flows Funds From Operations (a) $82.9 $ 83.6 $ 24.7 CapEx, Net (b) (14.0) (10.8) (7.6) Free Cash Flow $68.9 $ 72.8 $ 17.1 (a) Funds From Operations is defined as net cash provided by operating activities adjusted by taxes paid related to the sale of businesses of $7.0 million in 2006. (b) CAPEX, Net represents capital expenditures net of proceeds from the sale of assets ($ in millions) 2008 2007 2006

Financial Strengths Market share up – revenue and profit performance better than industry Commitment to cost containment $117.0 million cash at 12/31/08; substantial credit capacity if needed Positive free cash flow for ten calendar years

Profile For Growth TIMEEARNINGS Service ACQUISITIONS INCREMENTAL SERVICE GROWTH CURRENT OPERATIONS (CONSTRUCTION AND SERVICE) ENERGY EFFICIENCY Commercial HVAC

Operations Increase Productivity Education Leadership Project Managers Superintendents Service Sales Service Operations Craft Best Practices Project Management Estimating Cooperation with suppliers Prefabrication New materials and methods

Job Loop Project Estimating Post-Project Review We review projects and apply what we have learned to improve our performance. Project Pricing Project Qualification Project Management

The only things that evolve by themselves in an organization are disorder, friction and malperformance. -Peter Drucker

Service Increase Service* Grow Maintenance Base Education Employees and Customers Higher margin opportunity Recurring revenue National accounts $2.50+ of repair and replacement for every $1.00 of maintenance Target Retrofit Projects Energy Efficiency IAQ * Maintenance, service, repair, retrofit

Select Customers ® *Trademarks and logos are the property of their respective owners.

Energy Efficiency-Retrofitting HVAC Green not a “fad” Energy costs drive need for efficiency1 HVAC 30% - 65 % electric usage Energy Star (Dept. of Energy/EPA) / LEED2 (USGBC3) 2- 4 year pay outs depending on electric rates, usage, age 1. FMI projects $21.2 Billion of new non-residential construction in 2008 will use green building principles. 2. Leadership Energy and Environmental Design 3. United States Green Building Council

Growth Internal More of what we do best Service Energy efficiency Step Out Growth Start ups in new geographies New locations for existing companies Techs “on their own” Targeted acquisitions Best HVAC oriented mechanical in new area

$20 million in revenue Construction and service In a growing market where we are not now Company that has performed well in the past and has continuing demonstrable upside Organizational structure capable of sustaining/improving the company Ownership/management that wants to stay on to operate company The Ideal Candidate

Atlanta, GA (Service) Boise, ID Charleston, SC Columbia/Florence, SC Dallas/Fort Worth, TX El Paso, TX Ft. Lauderdale, FL Los Angeles, CA Nashville, TN Target Cities (Listed Alphabetically) Norfolk, VA Omaha, NE PA/NJ Portland, OR Richmond, VA San Antonio, TX Savannah, GA Spartanburg/Greenville, SC Tampa, FL

Outlook Long-Term $40+ billion fragmented industry HVAC is a basic necessity Commercial construction continuing Growing installed base for recurring maintenance, service, repair and retrofit Scale opportunities – service, purchasing, prefab, bonding, best practices Diverse customer base and geography Energy efficiency and IAQ Financially and operationally sound – continuing to grow organically and by acquisition

What We Do

CONTACT: Bill George Executive Vice President and CFO 1-800-723-8431 bgeorge@comfortsystemsusa.com www.comfortsystemsusa.com