Best HVAC Installations in Diamond Bar, CA (2026)

6 verified businesses · Sorted by rating & reviews

Also in Diamond Bar

Air Duct CleaningHVAC RepairMini Split / Ductless AC Installation
1

Southwest Heating & Air Conditioning

Google★★★★½4.9339 reviews
Yelp4.5 stars4.5544 reviews
→ Stable·3 mo: 5★ (14)·6 mo: 5★ (33)
Staff:+Bobby (2)owner (2)
622 Alpine St, Los Angeles, CA 90012
+1310-867-0703
HVAC contractor
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2

Los Angeles Heating and Air Conditioning

Google★★☆☆☆2.19 reviews
Yelp5 stars4.9533 reviews
↑ Improving·3 mo: 5★ (1)·6 mo: 5★ (2)
114 San Pedro St, Los Angeles, CA 90012
+1213-695-3895
HVAC contractor
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3

GR Air Conditioning

Google★★★★★546 reviews
2440 Chelsea St, Los Angeles, CA 90033
+1213-469-8632
HVAC contractor
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4

HVAC of Los Angeles

Google★★★★★516 reviews
→ Stable·3 mo: 5★ (3)·6 mo: 5★ (6)
115 W Cesar Estrada Chavez Ave, Los Angeles, CA 90012
+1408-469-4844
HVAC contractor
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HVAC of Los Angeles photo 1
5

Los Angeles HVAC Repair Service

Google★★★★★54 reviews
→ Stable·3 mo: 5★ (3)·6 mo: 5★ (4)
1005 W Rondout St, Los Angeles, CA 90012
+1213-376-1525
HVAC contractor
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6

Doctor HVAC & Heating

Google★★★★½4.85 reviews
317 S Spring St, Los Angeles, CA 90013
+1424-290-8395
HVAC contractor
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