Dennis’s Heating & Cooling

Licensed HVAC Experts Serving San Francisco — Heating • Cooling • Air Quality

Side-by-side comparison of a furnace before and after maintenance or replacement. The "Before" side shows an older, dusty furnace with a thick pipe and insulation. The "After" side shows a clean, modern furnace with new ductwork and a shiny metal vent pipe.
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Available 24/7 | Free Estimates | Licensed & Bonded

Your Comfort Is Our Business

Dennis’s Heating & Cooling is a family-owned and operated HVAC company serving San Francisco and the Bay Area.


Fully licensed (C-20 License #1137367) and bonded, we specialize in reliable heating and cooling services you can count on — 24 hours a day, 7 days a week.


✅ Licensed & Bonded (C-20)
✅ Family Owned & Operated

✅ 30+ Years of Experience

✅ 24/7 Emergency Service
✅ Senior & Military Discounts

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Outdoor air conditioning unit outside a beige building with electrical hookup and wires.

Complete HVAC Solutions

🧊 Cooling Services
AC repair, replacement, and maintenance to keep your home cool and comfortable.

🔥 Heating Services
Furnace repairs, wall and floor heater service, and gas-to-electric heat pump conversions.

💧 Additional Services
Ductwork, water heater service, and indoor air quality improvements.

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To show our appreciation, we proudly offer:


🎖️ Military Discounts
👵 Senior Citizen Discounts

Ask about our discounts when you schedule your next service.

We Care About Our Community

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Get in Touch

Ready to schedule your service or request a free estimate?
We’re available 24/7 and happy to help with all your heating and cooling needs.