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South San Francisco, California · HVAC

HVAC contractors in South San Francisco, CA

20 HVAC contractors in South San Francisco, out of 24 HVAC and plumbing businesses the Registry lists there. Ranked by Registry Score, owner-confirmed records first.

Pros
20
Avg. score
50.7
Scored
12

Summary

Data last updated

As of October 14, 2026, the ProComfort Registry lists 20 HVAC contractors in South San Francisco, California. Most-listed specialties: heating & furnaces (11), air conditioning (7), commercial (4), ductwork & IAQ (1). 12 have enough public signals for a Registry Score, averaging 50.7 out of 100; 2 score 70 or higher. Together they hold 4,241 public reviews on Google, Yelp and Facebook. The highest-scored is Rmi Mechanical Contractors, at 85 out of 100. 3 are Featured for 2026. View Rmi Mechanical Contractors.

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

Showing 1–20 of 20

HVAC contractors in South San Francisco: at a glance

How many HVAC contractors are in South San Francisco, California?
As of October 14, 2026, the ProComfort Registry lists 20 HVAC contractors in South San Francisco, California.
Who is the highest-scored HVAC contractor in South San Francisco, California?
By Registry Score, Rmi Mechanical Contractors (South San Francisco, CA) ranks first at 85 out of 100, among 12 scored businesses averaging 50.7. 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 South San Francisco, California for 2026?
ProComfort Registry features Rmi Mechanical Contractors, Peninsula Heating By Joseph Byrne, C & C Building Automation. Featured companies are selected editorially from public reviews and track record; listings and rankings are never sold.
How are HVAC contractors in South San Francisco, 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