| 3D Heating And Air LLC | Donald Victor Williams | — | (916) 820 6500 | HVAC | Sacramento · Sacramento County | — | — |
| 4 D Industries INC | Brian Peter Dongelmans | info@d-industries.com | (209) 745 0500 | HVAC | Galt · Sacramento County | — | — |
| 4 Winds Mechanical INC | Cesaer Manuel Garcia | — | (916) 667 4112 | HVAC | Sacramento · Sacramento County | — | — |
| 7 Days Heating And A/c INC | Aguilar Richard | — | (916) 519 9292 | HVAC | Sacramento · Sacramento County | — | — |
| A & A Air Service | Andrei Cucias | — | (916) 385 6705 | HVAC | Antelope · Sacramento County | — | — |
| A & M Heating And Air Conditioning | Matthew Ray Ryan | — | (916) 747 5654 | HVAC | Citrus Heights · Sacramento County | — | — |
| A - 1 Total Air Care | Michael Dale Ramsey | — | (916) 223 4397 | HVAC | Rio Linda · Sacramento County | — | — |
| A A A Electrical Services INC | Shawn Christian Wallace | — | (916) 561 0842 | HVAC | Sacramento · Sacramento County | — | — |
| A A Construction | Donald Joe Colvin | — | (916) 799 9416 | HVAC | Isleton · Sacramento County | — | — |
| A B C Heating & Cooling INC | Vincent Zidao Yan | — | (916) 832 8838 | HVAC | Elk Grove · Sacramento County | — | — |
| A C P Mechanical | Toro Adrian Del | evillarauz@acpmechanical.com | (916) 704 8556 | HVAC | Sacramento · Sacramento County | — | — |
| A C S Controls Corporation | Christopher George Fausett | — | (916) 640 8800 | HVAC | North Highlands · Sacramento County | — | — |
| A Cool Air INC | Angelina Kalinin | — | (916) 879 7288 | HVAC | Sacramento · Sacramento County | — | — |
| A D M Mechanical | A D M Mechanical | — | (916) 455 7462 | HVAC | Sacramento · Sacramento County | — | — |
| A Five Star Heating & Cooling | Sanders Mark | — | (916) 716 8942 | HVAC | Sacramento · Sacramento County | — | — |
| A K Air Systems | A K Air Systems | — | (916) 504 6180 | HVAC | Sacramento · Sacramento County | — | — |
| A M P V Heating & Air Conditioning | Adrian Vinicio Martinez Paz | — | (916) 997 7799 | HVAC | Sacramento · Sacramento County | — | — |
| A Plus Climate Heating And Air | Ryan Sandon Cacciato | — | (530) 405 8514 | HVAC | Sacramento · Sacramento County | — | — |
| A Plus Heating And Air INC | Kirill Lukichev | info@aplusheatingair.com | (916) 838 3748 | HVAC | Citrus Heights · Sacramento County | — | — |
| A T Mechanical | A T Mechanical | — | (916) 335 4447 | HVAC | Antelope · Sacramento County | — | — |
| A T S Heating And Air Services | Singh Atish | — | (916) 910 4367 | HVAC | Sacramento · Sacramento County | — | — |
| A Tech Electric And Mechanical | David William Robertson | — | (916) 699 7500 | HVAC | Citrus Heights · Sacramento County | — | — |
| A-class Heating And Air | Nikolay P Petrashishin | — | (916) 342 9108 | HVAC | Rancho Cordova · Sacramento County | — | — |
| Aaa AC & Heating INC | Shahmahmood Yousofi | — | (916) 345 3737 | HVAC | Sacramento · Sacramento County | — | — |
| Abbott Heating And Air Conditioning | Abbott Heating And Air Conditioning | — | (916) 989 8557 | HVAC | Orangevale · Sacramento County | — | — |
| Abc Quality HVAC INC | Carranza Antonio Bucio | — | (916) 842 1936 | HVAC | Sacramento · Sacramento County | — | — |
| Abel Air INC | Patrick Douglas Abelman | — | (510) 815 3022 | HVAC | Sacramento · Sacramento County | — | — |
| Abella's Heating & Air | Abella's Heating & Air | — | (916) 410 1779 | HVAC | Sacramento · Sacramento County | — | — |
| Abm Building Solutions LLC | Richard John Goetz | — | (916) 381 4526 | HVAC | Sacramento · Sacramento County | — | — |
| Absolute Comfort Heating And Air | David Arthur Rankin | — | (916) 224 7159 | HVAC | Fair Oaks · Sacramento County | — | — |
| AC Heating And Air Conditioning LLC | Alex Joseph Constance | — | (916) 912 7524 | HVAC | Sacramento · Sacramento County | — | — |
| Acacia M & E INC | Susan Dawn Pope | — | (916) 685 1887 | HVAC | Elk Grove · Sacramento County | — | — |
| Accent Heating And Air Conditioning | Accent Heating And Air Conditioning | — | (916) 838 9647 | HVAC | Elk Grove · Sacramento County | — | — |
| Accord Mechanical | Accord Mechanical | — | (916) 847 4994 | HVAC | Citrus Heights · Sacramento County | — | — |
| Ace Air Man INC | Aaron John Acevedo | — | (916) 761 0150 | HVAC | Orangevale · Sacramento County | — | — |
| Acr Heating & Air | Michael David Moyer | — | (209) 642 9104 | HVAC | Sacramento · Sacramento County | — | — |
| Action HVAC | Action HVAC | — | (916) 448 1760 | HVAC | Sacramento · Sacramento County | — | — |
| Acts HVAC | Acts HVAC | — | (916) 498 4765 | HVAC | Sacramento · Sacramento County | — | — |
| Acutech Appliance Heating & Air | Acutech Appliance Heating & Air | — | (916) 628 2619 | HVAC | Sacramento · Sacramento County | — | — |
| Advance Air & Electric | Harison Hedayat | — | (916) 257 8409 | HVAC | Folsom · Sacramento County | — | — |