| Thigpen Heating & Cooling Inc. | Jacksonville | FL | $3,988 |
| Jet Industries Inc. | Salem | OR | $3,980 |
| Capps Mechanical LLC | Huntingtown | MD | $3,875 |
| Precision Mechanical, Inc. | Everett | WA | $3,850 |
| Ed Bellm Plumbing Company | Saint Louis | MO | $3,835 |
| H.j. Pertzborn Plumbing And Fire Protection Corporation | Madison | WI | $3,820 |
| Desa Corp. Of Virginia | Alexandria | VA | $3,689 |
| Tru Plumbing And Gas LLC | Niceville | FL | $3,666 |
| West Sound Comfort Systems LLC | Silverdale | WA | $3,661 |
| F M Sylvan, Inc. | Perth Amboy | NJ | $3,575 |
| Walker Electric, Inc. | Andalusia | AL | $3,550 |
| Pipe Kings LLC | Centreville | VA | $3,538 |
| Rm Mechanical Inc. | Boise | ID | $3,534 |
| Armens, LLC | New Port Richey | FL | $3,500 |
| Cerris Systems, Inc. | Kansas City | MO | $3,453 |
| David Davis Heating, Air Conditioning & Electric, Inc. | Elkins | WV | $3,450 |
| J. W. Mcclenahan Co. | San Mateo | CA | $3,410 |
| Zenda LLC | Coral Springs | FL | $3,400 |
| Mechpro LLC | Tacoma | WA | $3,379 |
| The Oliver Sprinkler Co. Inc. | King Of Prussia | PA | $3,145 |
| Ruby Mountain Hvac And Refrigeration LLC | Elko | NV | $3,125 |
| Virginia Air Pro Heating And Air Conditioning, Inc. | Yorktown | VA | $3,050 |
| Rocketman Plumbing LLC | Albuquerque | NM | $3,035 |
| Danny Miller Plumbing, Inc. | Gulfport | MS | $3,004 |
| Rodriguez Plumbing Contractors, Inc. | San Juan | PR | $2,931 |
| Lelam Holdings LLC | Pflugerville | TX | $2,884 |
| Comfort Flow Heating, Co. | Springfield | OR | $2,862 |
| Ray Martin Company Of Omaha | Omaha | NE | $2,853 |
| Refrigeration Heroes, Inc. | Greer | SC | $2,850 |
| Coastal Air Balance Corporation | Metairie | LA | $2,640 |
| Quality Air Solutions Inc. | Miami | FL | $2,574 |
| Kannapolis Sprinkler Co. Inc. | Landis | NC | $2,563 |
| Seb Hvac Solutions LLC | Tampa | FL | $2,495 |
| Hoyt's Heating & Air Conditioning, Inc. | Sumter | SC | $2,000 |
| Twin Cities Fire Protection LLC | Stacy | MN | $1,755 |
| Careys Heating & Air Conditioning, Inc. | Tinley Park | IL | $1,700 |
| Southern Air, Incorporated | Lynchburg | VA | $1,605 |
| S & W Controls, Inc. | Upper Marlboro | MD | $1,598 |
| Hoholik Enterprises Inc. | Manistique | MI | $1,500 |
| High Desert Air Ductor Incorporated | Ridgecrest | CA | $1,400 |
| Maddox Air Conditioning, Inc. | Tyler | TX | $1,295 |
| 3RD Generation Plumbing, Inc. | Marathon | FL | $550 |
| Patriot Air Systems, Inc. | Oxnard | CA | $450 |
| Nivar Global Solutions LLC | Newark | NJ | $125 |
| Advanced Comfort Solutions, Inc. | Cheyenne | WY | $125 |
| 5 Seasons Mechanical LLC | Peachtree Corners | GA | $0 |
| A-1 Fire Protection, Inc. | San Diego | CA | Subcontractor |
| A-1 Heating & Air Conditioning, Inc. | Meridian | ID | $0 |
| A-1 Refrigeration & A C, LLC | Pitkin | LA | $0 |
| Aaa Accurate Backflow Testing And Repairs, LLC | Lexington | SC | $0 |
| Aa Dependable Air, Inc. | Hughesville | MD | Subcontractor |
| Aaim Services, LLC | Cummings | KS | Subcontractor |
| Aalanco Service Corp. | Westborough | MA | $0 |
| Abc General And Mechanical Services, Inc. | Derwood | MD | Subcontractor |
| Ac3e Hospitality Services Corp. | Scottsdale | AZ | $0 |
| Accel Fire Systems, Inc. | Anchorage | AK | Subcontractor |
| Ac Corporation | Greensboro | NC | Subcontractor |
| Ace Sheet Metal Works, Inc. | Norfolk | VA | Subcontractor |
| Ace Sprinkler And Fire Protection, LLC | Dayton | OH | Subcontractor |
| Aci Mechanical, Inc. | Ames | IA | $0 |
| Acme Industrial Piping, LLC | Chattanooga | TN | Subcontractor |
| Acr Services, Inc. | Norfolk | VA | Subcontractor |
| Acs System Associates Inc. | Hicksville | NY | $0 |
| A/c Technical Services, LLC | Castroville | TX | $0 |
| Action Automatic Sprinkler, Inc. | Waxahachie | TX | $0 |
| Action Inc. | Barling | AR | Subcontractor |
| Action Plumbing & Heating Inc. | Clio | MI | Subcontractor |
| Adams Plumbing & Heating, Inc. | Adams | MA | Subcontractor |
| Addison Energy Technologies, LLC | Toccoa | GA | Subcontractor |
| Addison Smith Mechanical Contractor, Inc. | Carrollton | GA | $0 |
| Adj Sheet Metal, Inc. | White Plains | MD | Subcontractor |
| Adkins & Kimbrough Mechanical LLC | Bessemer | AL | Subcontractor |
| Advanced Air & Metal Inc. | Central Point | OR | $0 |
| Advanced Mechanical Contractors, Inc. | Nashville | TN | $0 |
| Advanced Mechanical LLC | Radcliff | KY | $0 |
| Advanced Mechanical Of Northern Kentucky, LLC | Verona | KY | $0 |
| Advanced Plumbing & Mechanical, LLC | Monmouth | IL | Subcontractor |
| Advanced Sheetmetal Associates, LLC | Middlefield | CT | Subcontractor |
| Advanced Temperature Control LLC | San Antonio | TX | Subcontractor |
| Advanced Water Systems Of Coastal Nc-va, LLC | Chesapeake | VA | Subcontractor |
| Advance Telecom Process LLC | Dumfries | VA | Subcontractor |
| Aerohead Group, Inc. | Spring Branch | TX | Subcontractor |
| Affordable Fire Protection Inc. | Linwood | NJ | Subcontractor |
| A. G. O'brien Plumbing & Heating Co. | Hermantown | MN | Subcontractor |
| A&g Plumbing Services LLC | North Las Vegas | NV | Subcontractor |
| A G Prada Co. Inc. | Beltsville | MD | Subcontractor |
| Air Balance Co. Inc. | Covina | CA | Subcontractor |
| Air Balancing Service Co. | Newington | CT | $0 |
| Air-co Consolidated, LLC | Gilbert | AZ | $0 |
| Air Comfort Group LLC | Beaumont | TX | Subcontractor |
| Aircond Corporation | Smyrna | GA | Subcontractor |
| Air Conditioning Innovative Solutions, Inc. | Mckinney | TX | Subcontractor |
| Air Conditioning Solutions, Inc. | Altadena | CA | Subcontractor |
| Air Conditioning Specialist, Inc. | Covington | GA | $0 |
| Aircool Tech Act Corp. | Alamo | TX | $0 |
| Air Craft, Inc. | Round Rock | TX | $0 |
| Air Design Systems LLC | Las Vegas | NV | Subcontractor |
| Air Engineers, Inc. | Upper Marlboro | MD | $0 |
| Air-ex Air Conditioning Inc. | Pomona | CA | Subcontractor |
| Air Flow Mechanical, Inc. | Anaheim | CA | Subcontractor |
