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Stay Comfortable San Diego
AC installation & replacement in San Diego
New and replacement central air conditioning for homes and businesses across greater San Diego. Properly sized, cleanly installed, with free estimates and financing available on new systems.
- Free estimates on new systems
- Residential & commercial
- 5-star Google reviews
Free estimates on every new or replacement AC system. We look at your home, talk through options, and give you a clear written quote. Financing is available on new systems.
AC installation
What's included in an AC installation
Every AC installation starts with a free estimate.
Load calculation & sizing
We size the system to your home's square footage, layout, insulation, windows and sun exposure.
Matched equipment
Outdoor condenser and indoor coil matched to your furnace or air handler.
Ductwork check
We check your ducts and returns so the new system gets the airflow it needs.
Clean line set & drain
Refrigerant lines, condensate drain and connections installed neatly.
Thermostat setup
A thermostat that fits your new system, set up and explained.
Startup & testing
Charge, airflow and operation checked before we leave, plus a walkthrough.
When to replace
Signs it's time to replace your AC
- Frequent repairsRepeated breakdowns on an older unit often cost more over time than replacing it.
- It can't keep upThe house never reaches the set temperature on hot afternoons.
- Rising energy billsOlder air conditioners lose efficiency, and newer systems can use noticeably less energy.
- Older R-22 refrigerantR-22 is no longer produced, so refrigerant repairs on very old systems get expensive.
- Noise and clammy airLoud operation or a sticky feel indoors can mean the system is worn out or the wrong size.
Homes & businesses
Residential and commercial
For your home
Central AC replacements, new AC added to an existing furnace, and whole-home systems for remodels and additions.
For your business
Air conditioning for offices, retail and light-commercial buildings, including split systems and rooftop units.
FAQ
AC installation FAQ
How much does a new air conditioner cost?
It depends on the size of the home, the equipment you choose and any ductwork changes. Estimates are free, and financing is available on new systems.
How long does an AC replacement take?
A straightforward like-for-like replacement is usually much quicker than a new install that needs ductwork changes. We'll give you a timeline with your estimate.
Should I choose central AC or a heat pump?
If you also want efficient heating, a heat pump can do both. We'll compare a heat pump with central AC for your home.
What size air conditioner do I need?
Sizing depends on square footage, layout, insulation, windows and sun exposure. Bigger isn't better: an oversized unit short-cycles and can leave the house clammy.
Can you add AC to a home without ductwork?
Yes. Ductless mini splits are a great option for homes without ducts.
Ready for a new AC?
Get a free estimate on a new or replacement air conditioner.
Or email us at mike@75hvac.com