Family-Owned · 24+ Years · Bay Area, CA
Heating & Cooling Done Right
Honest pricing, licensed technicians, and 24/7 emergency service for homeowners and businesses across the Bay Area.
Featured Service
Wall Heater Installation & Repair
Fast, safe wall heater service for Bay Area homes — new installs, repairs, and safety inspections.
Featured Service
Floor Heater Installation & Repair
Reliable floor heater installation and repair, built for older Bay Area homes and modern retrofits alike.
24+
Years in Business
24/7
Emergency Service
100%
Licensed & Insured
Family
Owned & Operated
What We Do
Complete HVAC Services
HVAC Repair
Fast diagnostics and repair for any make or model.
HVAC Installation
New system installs sized right for your space.
HVAC Maintenance
Seasonal tune-ups that prevent costly breakdowns.
Air Conditioning Services
AC repair, replacement, and efficiency upgrades.
Heating Services
Complete heating repair and installation.
Ductwork Installation & Repair
Sealed, efficient ductwork for even airflow.
Wall Heater Installation & Repair
Wall heater installs, repairs, and safety checks.
Floor Heater Installation & Repair
Floor heater installs and repairs for older homes.
Central Furnace Services
Full-service central furnace repair and care.
Furnace Repair
Same-week furnace repair, done right the first time.
High-Efficiency Furnace Installation
Modern furnaces that lower your energy bills.
Smart Thermostat (Nest) Installation
Nest and smart thermostat setup and integration.
Residential HVAC Services
Complete comfort solutions for Bay Area homes.
Commercial HVAC Services
Reliable HVAC support for local businesses.
Equipment Maintenance
Ongoing care that extends equipment lifespan.
HVAC Consultation & Advisory
Expert guidance on the right system for your needs.
Heating & Cooling System Diagnostics
Precise diagnostics to find the real issue fast.
General HVAC Repairs
No job too small — general repairs done honestly.
Why O. S. Heating & Cooling
Built On Trust, Backed By Experience
Family-Owned
A local business built on personal relationships.
24+ Years Experience
Nearly a quarter-century serving the Bay Area.
Honest Pricing
Clear estimates, no surprise charges.
Licensed Technicians
Experienced, background-checked professionals.
Fast Response
Same-day and emergency service available.
Residential & Commercial
One team for homes and businesses alike.
Energy-Efficient Solutions
Systems that save money long-term.
Satisfaction Focused
Lasting relationships built on trust.
Our Work
Recent Installations & Repairs
Walnut Creek, CA
Central Furnace Install
Concord, CA
AC System Replacement
Berkeley, CA
Ductwork Retrofit
Richmond, CA
Wall Heater Upgrade
Oakland, CA
Floor Heater Replacement
Danville, CA
Smart Thermostat Setup
Customer Reviews
What Bay Area Customers Say
“They installed our new furnace in one day and the pricing was exactly what they quoted. No surprises.”
Maria T. — Concord
“Our wall heater went out in the middle of winter and they had someone out the same night.”
James R. — El Cerrito
“Professional, honest, and quick. We use them for all our rental properties now.”
Denise K. — Walnut Creek
Proudly Serving
The Entire Bay Area
From El Sobrante to Brentwood, our technicians provide fast, reliable HVAC service across these communities:
24/7 Emergency HVAC Service
No heat, no AC, no wait — we answer around the clock, every day of the year.