75 Degree Heating & AirSan Diego Heating & Air Conditioning Experts
“Stay Comfortable San Diego”
Family-owned and based in San Diego. We repair, maintain and install heating and cooling systems for homes and businesses across San Diego County: furnaces, heat pumps, air handlers, ductless mini splits and commercial rooftop units.
- Free estimates on new & replacement systems
- Financing available
- Residential & commercial
- 5-star Google reviews
Proudly serving the greater San Diego area, from the coast to the mountains. Financing available on new systems; ask us for details.
See our service areaWhat we do
Heating & air conditioning services in San Diego
Repair, maintenance and installation for residential and commercial heating and air conditioning, on every make and model.
AC Repair
AC not cooling or won't turn on? We repair central AC, heat pumps, mini splits and rooftop units. $89 first-hour diagnostic.
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Heating & Furnace Repair
No heat or cold air from the vents? We repair gas furnaces, heat pumps and air handlers on all makes and models.
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AC Installation & Replacement
New and replacement central air, properly sized and cleanly installed. Free estimates and financing on new systems.
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Heat Pumps
One efficient system for heating and cooling, ducted or ductless. Installation, replacement and repair.
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HVAC Installation & Replacement
New and replacement furnaces, heat pumps, air conditioners and air handlers, sized for your home or building. Free estimates.
Learn more →Preventative Maintenance
Seasonal tune-ups for $89 per unit, to help your system run efficiently, last longer and avoid surprise breakdowns.
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Ductless Mini Splits
Clean, efficient comfort for additions, garages, hot rooms and homes without ductwork. Free estimates.
Learn more →Indoor Air Quality
Filtration, Phenomenal Aire air purification and humidity control so the air feels as good as the temperature.
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New Construction
Custom home specialists and Title 24 experts, from rough-in to start-up. Send us your plans for a free estimate.
Learn more →- Furnaces
- Heat pumps
- Air conditioners
- Air handlers
- Ductless mini splits
- Commercial rooftop units
- Indoor air quality
Commercial HVAC
Commercial HVAC & rooftop units
Offices, retail, restaurants and light-commercial buildings depend on rooftop package units. We keep them running.
- Rooftop unit diagnosis & repair
- Scheduled preventative maintenance
- RTU replacement, with free estimates
- Air handlers, heat pumps & split systems
Why choose us
A small company that does it right
Family-owned
A mom-and-pop company. Owner Mike Mauzy learned the trade from his grandfather and father.
NATE-certified
Trained technicians who work on all makes and models of heating and cooling equipment.
Honest pricing
Free estimates on new systems, and a straightforward $89 first-hour diagnostic for repairs.
Treated like family
Customers mention Mike by name in their reviews. You deal with the people who own the work.
“I learned the trade from my grandpa and my dad, and I carry on the ethics and morals they instilled in me.” Mike Mauzy, owner. Our story →
Our work
On the job around San Diego
Real photos of our crew at work: installs, service calls and new construction.
Service area
Proudly serving the greater San Diego area
Based in San Diego, we serve homes and businesses across San Diego County, from Coronado to Julian. Not sure if you're in our area? Give us a call.
- San Diego
- Ramona
- Coronado
- Julian
- Alpine
- Escondido
- Poway
- El Cajon
- Santee
- Lakeside
- Santa Ysabel
- & surrounding communities
Our shop: 2558 Eltinge Dr., Alpine, CA 91901 · Mon–Sat, 6 AM–6 PM
Reviews
What our customers say
★★★★★ 5-star reviews on Google
“Above and beyond isn’t a strong enough term for the expertise and professionalism Mike (and crew) brings to their work. Efficient, fast and professional. You can’t go wrong hiring this company for any/all HVAC needs. My new mini-split is awesome! From the consult to the result, I couldn’t be happier.”
“Mike did great work and was able to repair our AC unit, even though it is quite old.”
Free estimates
Get a free estimate
Free estimates on new and replacement systems: furnaces, heat pumps, AC, air handlers, mini splits, rooftop units and indoor air quality. Need a repair instead? Our diagnostic visit is $89 for the first hour.
- Call619-333-7575
- Emailmike@75hvac.com
- Shop2558 Eltinge Dr., Alpine, CA 91901
- HoursMon–Sat, 6 AM–6 PM
- Instagram@75hvac
- Facebook75 Degree Heating & Air
Pick a time that works for you, or send us a request below.