85
ExceptionalFullerton, CA 92833 4.8(507 reviews)
HVACHeatingA/C
Fullerton, California · HVAC
HVAC contractors in Fullerton, CA
50 HVAC contractors in Fullerton, out of 51 HVAC and plumbing businesses the Registry lists there. Ranked by Registry Score, owner-confirmed records first.
- Pros
- 50
- Avg. score
- 47.1
- Scored
- 33
Summary
Data last updatedAs of October 15, 2026, the ProComfort Registry lists 50 HVAC contractors in Fullerton, California. Most-listed specialties: air conditioning (30), heating & furnaces (27), refrigeration (3), ductwork & IAQ (2). 33 have enough public signals for a Registry Score, averaging 47.1 out of 100; 6 score 70 or higher. Together they hold 2,116 public reviews on Google, Yelp and Facebook. The highest-scored is Jamison Heating & Cooling Services, at 85 out of 100. 8 are Featured for 2026. View Jamison Heating & Cooling Services.
Counts come straight from the Registry's records. How the Registry Score works
Featured HVAC contractors in Fullerton
72
Strong71
StrongFullerton, CA 92831 4.9(264 reviews)
HVACHeatingA/C
69
Established66
EstablishedFullerton, CA 92832 4.7(64 reviews)
HVACHeatingA/C
65
EstablishedShowing 1–20 of 50
85
ExceptionalFullerton, CA 92833 4.8(507 reviews)
HVACHeatingA/C
80
Strong76
StrongFullerton, CA 92831 4.9(355 reviews)
HVACHeatingA/CRefrigeration
75
StrongFullerton, CA 92831 4.5(456 reviews)
HVACHeating
72
StrongFullerton, CA 92832 4.8(36 reviews)
HVACHeatingA/C
71
StrongFullerton, CA 92831 4.9(264 reviews)
HVACHeatingA/C
69
EstablishedFullerton, CA 92832 4.8(43 reviews)
HVACHeatingA/C
68
Established66
EstablishedFullerton, CA 92832 4.7(64 reviews)
HVACHeatingA/C
65
Established62
EstablishedFullerton, CA 92833 4.2(77 reviews)
HVACHeatingA/C
58
Established57
Established52
EstablishedFullerton, CA 92832 4.2(2 reviews)
HVACPlumbingHeatingA/C
52
EstablishedFullerton, CA 92831 4.2(1 reviews)
HVACA/CRefrigeration
52
EstablishedFullerton, CA 92832 4.5(11 reviews)
HVACHeatingA/C
51
Established51
Established49
DevelopingFullerton, CA 92831 4.1(7 reviews)
HVACHeatingA/C
48
DevelopingHVAC contractors in Fullerton: at a glance
- How many HVAC contractors are in Fullerton, California?
- As of October 15, 2026, the ProComfort Registry lists 50 HVAC contractors in Fullerton, California.
- Who is the highest-scored HVAC contractor in Fullerton, California?
- By Registry Score, Jamison Heating & Cooling Services (Fullerton, CA) ranks first at 85 out of 100, among 33 scored businesses averaging 47.1. The score combines public reviews (50 points), digital presence (30) and reach (20); nobody can pay for a higher score.
- Which companies are featured in Fullerton, California for 2026?
- ProComfort Registry features Jamison Heating & Cooling Services, Horton's Heating & Air, Evolution Heating And Air Conditioning, Air Revolution Heating & Cooling, HVAC: Heating & Air Conditioning Inc, Cool Air Fullerton. Featured companies are selected editorially from public reviews and track record; listings and rankings are never sold.
- How are HVAC contractors in Fullerton, California ranked?
- By Registry Score (0-100, from public reviews, digital presence and reach), with records confirmed by their owners listed first. The full method is at https://procomfortregistry.online/methodology.
What this list includes: heating, ventilation and air conditioning businesses (furnaces, heat pumps, A/C, climate control). Tags come from each business's public category and name, so a company can appear under several trades. HVAC contractors across the US