D.A. Davidson & Company

1. D.A. Davidson & Company Ninth Annual Engineering & Construction Conference September 28, 2010

2. Forward-Looking Statements This material and related presentation may contain certain forward-looking statements within the meaning of the Private Securities Reform Act of 1995. All such forward-looking statements are based upon information available to EMCOR Group, Inc. (“EMCOR”) and management’s perception thereof, as of the date hereof. These forward-looking statements may include statements regarding market share growth, gross profit, project mix, projects with varying profit margins, and selling, general and administrative expenses. These forward-looking statements involve risks and uncertainties that could cause actual results to differ materially from the forward-looking statements. Accordingly, these statements are no guarantee of future performance. Such risk and uncertainties include, but are not limited to, adverse effects of general economic conditions, changes in the political environment, changes in the specific markets for EMCOR’s services, adverse business conditions, increased competition, unfavorable labor productivity, mix of business, and risks associated with foreign operations. The aforementioned risks and factors should be taken into account in evaluating any forward-looking statements.   1

3. 26,000 employees EMCOR Group • World’s largest specialty construction and facilities services provider • 2010 estimated revenues $5.0 billion ~ ~ • Over 170 permanent locations: U.S., Canada, U.K. 2

4. Services We design, install and maintain systems that create facility environments Mechanical / HVAC / Sheet Metal Electrical / Low Voltage / Voice / Data Communications / Transmission and Distribution Plumbing / Fire Protection / High-Purity Piping / Process Piping Industrial / Refinery Services / Energy Facilities Services 3

5. A Life Cycle Approach to Services 4

6. Broad Market Coverage 5

7. Government Services Business / Product Portfolio Leading Market Position Across all Businesses CORE GROWTH PLATFORMS Electrical Construction Mechanical Construction International Construction Mechanical Services Fire Protection Site-Based Industrial # 1 Market Leading Position # 2, 3 Commercial Top 10 # 1 Non-OEM # 2 Non-OEM # 1 Heat Exchangers # 1 6

8. EMCOR Services 7

9. Commercial Hospitality Industrial Healthcare Institutional Transportation Water & Wastewater Backlog ($ Millions) $5,000 $4,000 $3,000 $2,000 $1,000 $0 2003 2004 2005 2006 2007 2008 2009 2010 - Qtr. 2 Commercial Hospitality / Gaming Industrial Healthcare Institutional Transportation Water & Wastewater 8

10. Recent Awards • Naval District Washington – Washington, D.C. Area • Major U.S. Auto Manufacturer – Oshawa, Ontario • Retail Mall – Trumbull, CT • Enterprise Products Company – Houston, TX • FAA Control Tower – Palm Springs, CA • U.S. Federal Courthouse – Los Angeles, CA • Automated Traffic Surveillance and Control – Los Angeles, CA • NY State Traffic Signals – Suffolk and Nassau Counties, NY 9

11. Key Financial Data – Income Statement ($ Thousands, except per share information) (Unaudited) • Amount is shown net of tax effect of $8.0 million related to the impairment loss and zero for the gain on sale due to the release of a • valuation allowance related to capital loss carryforwards 10

12. Key Financial Data – Balance Sheet ($ Thousands) 11

13. Mega-Trends Shaping the Future Healthcare Energy Prices “Green” Water Terrorism & Security 12

14. 2010 Operational Focus • Commercial and hospitality markets to remain under pressure, public spending growing • Cost Control • Direct Cost – Union relationships a plus • Overheads – Balance to work volume • Discipline • Bid selectivity: balance risk / reward • Opportunity • Liquidity for investments and acquisitions 13

15. 2010 Guidance 14