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Ontario, California · HVAC

HVAC contractors in Ontario, CA

8 HVAC contractors in Ontario, out of 8 HVAC and plumbing businesses the Registry lists there. Ranked by Registry Score, owner-confirmed records first.

Pros
8
Avg. score
59.2
Scored
5

Summary

Data last updated

As of October 1, 2026, the ProComfort Registry lists 8 HVAC contractors in Ontario, California. Most-listed specialties: air conditioning (6), heating & furnaces (5). 5 have enough public signals for a Registry Score, averaging 59.2 out of 100; 2 score 70 or higher. Together they hold 396 public reviews on Google, Yelp and Facebook. The highest-scored is Advanced Comfort Heating & Air Conditioning, at 84 out of 100. View Advanced Comfort Heating & Air Conditioning.

Counts come straight from the Registry's records. How the Registry Score works

Showing 1–8 of 8

HVAC contractors in Ontario: at a glance

How many HVAC contractors are in Ontario, California?
As of October 1, 2026, the ProComfort Registry lists 8 HVAC contractors in Ontario, California.
Who is the highest-scored HVAC contractor in Ontario, California?
By Registry Score, Advanced Comfort Heating & Air Conditioning (Ontario, CA) ranks first at 84 out of 100, among 5 scored businesses averaging 59.2. The score combines public reviews (50 points), digital presence (30) and reach (20); nobody can pay for a higher score.
How are HVAC contractors in Ontario, 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