| 101 AC & Heating INC | Eugene Andrew Ayala | — | (805) 746 8582 | HVAC | Oxnard · Ventura County | — | — |
| 1st HVAC INC | Mostafa Mohammad Ashraf | — | (805) 222 6941 | HVAC | Moorpark · Ventura County | — | — |
| 72 Mechanical Heating And Air Conditioning | Alberto Perez | — | (805) 816 6165 | HVAC | Oxnard · Ventura County | — | — |
| 805 Mechanical | John Joseph Maskrey | — | (818) 317 2130 | HVAC | Simi Valley · Ventura County | — | — |
| A/c One INC | Orlando Antonio Lopez Cabrera | — | (310) 310 5972 | HVAC | Simi Valley · Ventura County | — | — |
| Abm Air Conditioning And Heating | Abm Air Conditioning And Heating | — | (805) 813 5439 | HVAC | Simi Valley · Ventura County | — | — |
| AC Technology Heating And Air LLC | Alan Joshua Concha | — | (805) 201 8160 | HVAC | Oak View · Ventura County | — | — |
| Ace Heating And Air | Asa Duane Manning | — | (805) 660 9735 | HVAC | Simi Valley · Ventura County | — | — |
| Acme Heating & Air Conditioning Company | Adam Wilson Neely | — | (805) 446 3091 | HVAC | Thousand Oaks · Ventura County | — | — |
| Acosta Heating And Air Conditioning INC | Jesse Iii Acosta | — | (805) 498 3939 | HVAC | Newbury Park · Ventura County | — | — |
| Adolfo Refrigeration | Adolfo Refrigeration | — | (805) 797 3296 | HVAC | Oxnard · Ventura County | — | — |
| Advanced Air Systems | Advanced Air Systems | — | (818) 577 5195 | HVAC | Simi Valley · Ventura County | — | — |
| Advanced Aire Flow INC | Rolando Gabriel Juarez | — | (805) 760 4840 | HVAC | Fillmore · Ventura County | — | — |
| Advanced Performance Heating And Air Conditioning | Gregory Daryl Weiss | — | (805) 813 8855 | HVAC | Camarillo · Ventura County | — | — |
| Aeterna Energy LLC | Ronald Joseph Harris | — | (805) 823 3232 | HVAC | Simi Valley · Ventura County | — | — |
| Air Bending Heating And Air | Air Bending Heating And Air | — | (805) 990 9121 | HVAC | Simi Valley · Ventura County | — | — |
| Air By Kenny Kalbfleish | Air By Kenny Kalbfleish | — | (805) 231 1773 | HVAC | Simi Valley · Ventura County | — | — |
| Air Care Heating And Air | Air Care Heating And Air | — | (805) 701-1296 | HVAC | Ventura · Ventura County | — | — |
| Air Control Company | Frederick Joseph Iii Suddes | interested@domainmarket.com | (805) 646 2177 | HVAC | Ojai · Ventura County | — | — |
| Air Force Air Conditioning & Heating INC | Rocky Joseph Rocco | — | (805) 409 9010 | HVAC | Thousand Oaks · Ventura County | — | — |
| Air Innovations INC | Jovan Perez | — | (805) 407 4749 | HVAC | Ventura · Ventura County | — | — |
| Air Solutions Air Conditioning & Heating | Daniel Kent Whaley | — | (805) 908 1031 | HVAC | Thousand Oaks · Ventura County | — | — |
| Air Solutions And Beyond INC DBA Your Air Solutions | Amir Rahamim | — | (310) 877 7804 | HVAC | Westlake Village · Ventura County | — | — |
| Air System Solutions INC | Annie Catherine Kwasny | brian@airsystemsolutions.com | (805) 647 8551 | HVAC | Ventura · Ventura County | — | — |
| Air Temperature Solutions INC | Michael Robert Clark | — | (818) 647 1116 | HVAC | Simi Valley · Ventura County | — | — |
| Air Trend | Air Trend | — | (818) 700 1255 | HVAC | Simi Valley · Ventura County | — | — |
| Air-fab Services INC | Jaime Rubalcaba Jr Sandoval | airfabservices@gmail.com | (805) 666 9750 | HVAC | Simi Valley · Ventura County | — | — |
| Aire Comfort INC | John Bruce Pelkola | — | (805) 797 9968 | HVAC | Ventura · Ventura County | — | — |
| Aire Serv Of Camarillo | Jennifer Lynn Skare | — | (805) 482 1196 | HVAC | Oxnard · Ventura County | — | — |
| Airtek H V A C | Airtek H V A C | — | (615) 554 5994 | HVAC | Simi Valley · Ventura County | — | — |
| Airworks Heating Air Plumbing | Airworks Heating Air Plumbing | info@airworkssolutions.com | (805) 312-9539 | HVAC | Somis · Ventura County | — | — |
| Airworks Solutions INC | Kevin Tanner Allen | info@airworkssolutions.com | (805) 754 6468 | HVAC | Camarillo · Ventura County | — | — |
| Aj's Heating & Air | Aj's Heating & Air | — | (805) 794 7983 | HVAC | Ventura · Ventura County | — | — |
| Alfa Services INC DBA Ac911.com | Oze Strausman | — | (888) 692 2911 | HVAC | Moorpark · Ventura County | — | — |
| All American Air Conditioning And Heating | William Thomas Hartin | — | (805) 652 2224 | HVAC | Ventura · Ventura County | — | — |
| All County Air Conditioning & Heating INC | Hector Cortez Ortiz | — | (805) 433 5292 | HVAC | Ventura · Ventura County | — | — |
| All In House Construction INC | Marco Anthony Venegas | — | (805) 630 1173 | HVAC | Fillmore · Ventura County | — | — |
| All Toasty_heating & AC | All Toasty_heating & AC | — | (805) 482 3457 | HVAC | Camarillo · Ventura County | — | — |
| All Valley Air Heating-air Conditioning | All Valley Air Heating-air Conditioning | — | (805) 522 8820 | HVAC | Simi Valley · Ventura County | — | — |
| Alpine Refrigeration | Alpine Refrigeration | — | (805) 496 3228 | HVAC | Simi Valley · Ventura County | — | — |