About Coss Heating
We’re a San Bernardino HVAC team focused on honest recommendations, code-compliant work, and crews who treat your home like their own.
Our story
COSS Heating & Air began as a two-truck crew taking calls for neighbors caught in brutal summer heat—homeowners who needed someone to show up, tell the truth, and fix it right the first time. We’ve grown into a full-service HVAC shop serving San Bernardino and California, but the fundamentals haven’t changed: on-time arrivals, options explained in plain English, and workmanship we stake our name on—from every braze to every refrigerant charge we verify.
That approach is how we’ve logged 15+ years in the field and 8,200+ completed jobs—not by cutting corners, but by treating installs, tune-ups, and repairs like long-term relationships. When you invite our team onto your property, you get the same process we’d want at our own homes: clear scope up front, respect for your space, and follow-through after the truck rolls away.
How we work
- Load calculations first — no guesswork on system sizing.
- Photo documentation — you see what we see, before and after.
- Warranty support — we coordinate manufacturer coverage and our own workmanship guarantee.
See us in action
Short clips from real job sites—press play on any reel. Each preview shows the first frame of the clip once it loads.
Air deployment
Crain day
Air deployment day
Air deployment day
Nice view · residential
Residential installation
Credentials & standards
Your safety and permit compliance are non-negotiable.
Licensed & insured
Licensed residential & & commercial heating and cooling in southern CA.
EPA-certified
Proper refrigerant handling, recovery, and documentation on every job that requires it.
Ongoing training
Technicians train on new inverter systems, smart controls, and ventilation best practices.
Join our client family
Ask about maintenance plans, multi-property rates, or a walkthrough for a new build.
Contact us