❄️ Official Rankings
10 Best HVAC in Sunnyvale, CA (August 2026)
We compared 10 hvac serving Sunnyvale and Santa Clara County, California, and ranked the top providers by verified reviews, ratings, and local reputation — 950 customer reviews in all.
The 10 listed below hold an average rating of 5.0 out of 5, led by United HVAC, Plumbing & Electrical. Updated for August 2026.
- HVAC ranked
- 10
- Average rating
- 5.0★
- Reviews analyzed
- 950
- Area codes
- 408, 650
United HVAC, Plumbing & Electrical
⭐ 5.0 · 134 reviews
1159 Sonora Ct, Sunnyvale, CA 94086
Made Simple Heating And Air
⭐ 5.0 · 114 reviews
3030 Lawrence Expy, Santa Clara, CA 95051
Same Day Air Conditioning & Heating
⭐ 4.7 · 551 reviews
1212 W McKinley Ave #4, Sunnyvale, CA 94086
Precision Air Conditioning & Heating
⭐ 5.0 · 24 reviews
1055 Manet Dr, Sunnyvale, CA 94087
Balcom Heating & Air
⭐ 5.0 · 19 reviews
848 W Evelyn Ave suite A, Sunnyvale, CA 94086
Sunnyvale Air Duct Cleaning
⭐ 5.0 · 10 reviews
445 Pala Ave, Sunnyvale, CA 94086
HVAC in Sunnyvale — FAQs
How do I choose the most reliable HVAC company in Sunnyvale, CA?+
Compare local companies on verified reviews, confirm they service your equipment — central air, heat pump, or furnace — and check they're licensed in California. Top-rated options serving Sunnyvale include Spark Heating & Cooling and Precision Air Conditioning & Heating. Ask about availability for both summer cooling and winter heating.
How much does HVAC service or installation cost in Sunnyvale?+
Costs depend on whether you need a repair, a tune-up, or a full system replacement, plus your home's size, so Sunnyvale contractors quote after an assessment. For installations especially, get two or three quotes from top-rated local companies to compare.
How often should I service my heating and cooling system in Sunnyvale?+
Most HVAC pros recommend an annual air-conditioning check before summer and a heating tune-up before winter. Regular maintenance keeps the system efficient and helps catch small problems before they fail.
Which HVAC companies are top-rated in Sunnyvale, CA?+
By verified reviews, highly rated HVAC providers serving Sunnyvale include Spark Heating & Cooling, Made Simple Heating And Air, Precision Air Conditioning & Heating, and Balcom Heating & Air. Sunnyvale is in Santa Clara County (area codes 408, 650).
HVAC listed here serve Sunnyvale, Santa Clara County, and nearby ZIP codes including 94085, 94086, 94087, 94088, 94089, 94090, 94091.