| 1 Haro 1 LLC | Ruben Terriquez | — | (408) 464 4564 | HVAC | San Jose · Santa Clara County | — | — |
| 1 Hour Drain Hotshot Restoration | Robert John Gallaher | — | (408) 825 1362 | HVAC | San Jose · Santa Clara County | — | — |
| 1153 San Rafael LLC | Najjarian Raman | — | (408) 712 4692 | HVAC | San Jose · Santa Clara County | — | — |
| 2020 Heating & Air INC | Silvia Eufrosina Olivares Montiel | — | (408) 661 9138 | HVAC | San Jose · Santa Clara County | — | — |
| 3M General Services | Minh Quang Nguyen | — | (408) 472 9395 | HVAC | San Jose · Santa Clara County | — | — |
| 72 Degrees | Mitchel Ray Cooper | — | (408) 437 2442 | HVAC | San Jose · Santa Clara County | — | — |
| 72 Infinity Heating & Air INC | Gomez Luna Rigoberto | — | (408) 605 2756 | HVAC | San Jose · Santa Clara County | — | — |
| A & A Plumbing | A & A Plumbing | — | (408) 738 8878 | HVAC | Sunnyvale · Santa Clara County | — | — |
| A & B Heating And Air Conditioning | Barajas Braulio | — | (408) 272 8045 | HVAC | San Jose · Santa Clara County | — | — |
| A & H Heating & Air Conditioning Service INC | Manuel Rodolfo Diaz | — | (408) 279 0722 | HVAC | San Jose · Santa Clara County | — | — |
| A & S Heating Cooling & Appliance Repair | Corona-mora Adrian | — | (408) 270 2260 | HVAC | San Jose · Santa Clara County | — | — |
| A F S A Construction Company | Farzan Ali | — | (408) 913 3226 | HVAC | San Jose · Santa Clara County | — | — |
| A Fedair | A Fedair | afedair@gmail.com | (408) 607 0005 | HVAC | Morgan Hill · Santa Clara County | — | — |
| A G C INC | Elizabeth Anne Guinnane | — | (408) 369 6305 | HVAC | Campbell · Santa Clara County | — | — |
| A Mayberry Adu | William Aaron Van Roo | hello@mayberryworkshop.com | (408) 294 7775 | HVAC | Santa Clara · Santa Clara County | — | — |
| A O Heating & Air - Conditioning | Moon Kyung Sik | — | (408) 930 2809 | HVAC | San Jose · Santa Clara County | — | — |
| A P Air Systems | Mark Arkadyevich Fridlyand | — | (408) 733 2000 | HVAC | Campbell · Santa Clara County | — | — |
| A Plus Commercial Services | Herbert Clyde Jr Demello | — | (408) 258 6864 | HVAC | San Jose · Santa Clara County | — | — |
| A R C Mechanical Systems INC | Adrian Rico Contreras | — | (408) 595 6577 | HVAC | Gilroy · Santa Clara County | — | — |
| A-1 Heating And Cooling INC | Kimberle Ann| Gentile Kimberly Ann Gentile | — | (408) 283 9915 | HVAC | San Jose · Santa Clara County | — | — |
| A3 Mechanical Systems | A3 Mechanical Systems | — | (408) 639 8255 | HVAC | San Jose · Santa Clara County | — | — |
| A4 Heating And Air | A4 Heating And Air | — | (408) 415 0782 | HVAC | Gilroy · Santa Clara County | — | — |
| Above All Heating & Air Conditioning | Joao Motta Vicente | — | (408) 592 4132 | HVAC | San Jose · Santa Clara County | — | — |
| Ace Mechanical | Ace Mechanical | info@ace-mechanical.com | (408) 430 9713 | HVAC | Gilroy · Santa Clara County | — | — |
| Aces Air | Aces Air | — | (408) 506 5631 | HVAC | San Jose · Santa Clara County | — | — |
| Advanced Technical HVAC | Advanced Technical HVAC | advancedtechnicalhvac@gmail.com | (650) 222 0925 | HVAC | Milpitas · Santa Clara County | — | — |
| Ae Cooling & Heating DBA General Const | Nhattruong Trung Truong | — | (408) 218 5880 | HVAC | San Jose · Santa Clara County | — | — |
| Ag Heating And Cooling INC | Godoy-tejeda Andres | — | (408) 205 6580 | HVAC | Campbell · Santa Clara County | — | — |
| Ag Mechanical | Ag Mechanical | anapbm@gmail.com | (408) 216 9617 | HVAC | San Jose · Santa Clara County | — | — |
| Agile Heating And Cooling | Agile Heating And Cooling | — | (650) 625 7475 | HVAC | San Jose · Santa Clara County | — | — |
| Air A C - Construction | Cahci Dmitri | — | (408) 625 9695 | HVAC | San Jose · Santa Clara County | — | — |
| Air Care Heating & Cooling INC | Joseph Anthony Mangano | — | (408) 809 7350 | HVAC | San Jose · Santa Clara County | — | — |
| Air Concepts Mechanical | Air Concepts Mechanical | — | (916) 539 0332 | HVAC | Santa Clara · Santa Clara County | — | — |
| Air Control Mechanical | Air Control Mechanical | interested@domainmarket.com | (925) 724 8298 | HVAC | Santa Clara · Santa Clara County | — | — |
| Air Controlled | Air Controlled | — | (408) 439 6404 | HVAC | San Jose · Santa Clara County | — | — |
| Air Elements Mechanical | Air Elements Mechanical | — | (408) 476 2999 | HVAC | San Jose · Santa Clara County | — | — |
| Air Heating And Cooling | Air Heating And Cooling | — | (408) 374 9222 | HVAC | San Jose · Santa Clara County | — | — |
| Air Hero Heating And Air Conditioning INC | Jesse Bocanegra | — | (408) 508 8621 | HVAC | San Jose · Santa Clara County | — | — |
| Air Mechanix | Air Mechanix | — | (408) 802 3589 | HVAC | Gilroy · Santa Clara County | — | — |
| Air Sharks LLC | Khaled Ahmad Alsaka | — | (877) 774 2757 | HVAC | San Jose · Santa Clara County | — | — |