81
StrongDiamond Bar, CA 91765 4.8(59 reviews)
HVACHeatingA/C
Featured · Diamond Bar 2026Not yet confirmed by ownerPCR-0Z2BBQV
McMaster Mechanical
Rated 4.9★ across 100 public reviews
20903 Ambushers St, Diamond Bar, CA 91765Heating & Air Conditioning/HVAC
HVACHeating & furnacesAir conditioningCommercial
54
Details compiled from public sources. The owner has been invited to confirm them.Own this business? Confirm details →
About
McMaster Mechanical is a heating and air conditioning contractor based in Diamond Bar, California. Across Google, Yelp and Facebook it holds a blended 4.9-star rating from 100 reviews. Listed specialties include heating & furnaces, air conditioning, commercial.
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Reputation
Blended 4.90 ★ · 100 reviewsGoogle5.061 reviews
Yelp5.025 reviews
Facebook5.014 reviews
Ratings are collected from each platform's public profile and refreshed periodically. The Registry doesn't host reviews.
Registry Score breakdown
54 / 100Reputation44/50
Rating quality and review volume
Digital presence8/30
Website, mobile, schema, analytics, Google profile
Reach2/20
Social profiles, advertising, audience
Location & service area
Areas served
Long Beach metro area (not yet confirmed)