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Best air conditioning pros near Foster City, CA

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Verified Reviews for Air Conditioning pros in Foster City, CA

*The Angi rating for Air Conditioning companies in Foster City, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Air Conditioning needs.

*The HomeAdvisor rating for Air Conditioning companies in Foster City, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Air Conditioning needs.

Last update on May 31, 2026

Top-Rated Air conditioning pros in Foster City - Updated Nov 2026

Avatar for DUKES HEATING & AIR CONDITIONING
DUKES HEATING & AIR CONDITIONING
4.8(
135
)
Central A/C - InstallCentral A/C - Install - For BusinessDuctless Mini-split A/C - Install or Replace+3 more

Serving Foster City, CA and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Duke did a great job at a fair price. We needed AC and decided to replace our old furnace at the same time. In addition Duke wrapped with insulating bubble wrap our old ducts that were exposed. He tied the drip line into our existing downspout in a neat fashion. I'd highly recommend him (he's a fellow submarine vet too!!)."
Heat Pump Repairs & Installations
Central Air Cut-Ins
Electric Furnace Repairs & Installations
Response time1 day
Response rate100%
32 neighbors recently requested a quote
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Avatar for Global Comfort Heating and Air
Global Comfort Heating and Air
4.8(
52
)
Central A/C - Service or Repair

Serving Foster City, CA and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

"Rudy is the man!!! Short notice on the weekend and had my AC back up in hours! Replaced 18 year Old Unit that was dead and got me air during 100-105 degree week!"
Team Global Comfort Truck
Carrier Heater Changeout
Duct Install securing runs
Duct Install securing runs
Carrier 95% Installation

+9

Response time50 mins
Response rate94%
2 neighbors recently requested a quote
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Avatar for Valley Heating, Cooling, Electrical and Solar
Valley Heating, Cooling, Electrical and Solar
4.7(
1,755
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+2 more

Serving Foster City, CA and surrounding areas

Approved

In business since 1962

Free estimates

Emergency services offered

"I first contacted Valley to get a quote on how much it would cost to get air conditioning installed. I live in an older town home that is approximately 1100 sq. ft. They sent someone out to take a look and see what was involved. He was very professional and explained what was involved including getting permits from the city. He quoted the amount and provided me with an invoice. I contacted them 3 months later to say I was ready for the install. The installation turned out to be quite challenging due to the way my home is constructed, but Valley made it work. The service person had to stay a few hours longer but I wasn't charged anything extra for it. They stuck with the amount of the estimate that was quoted. It's only been a couple of months since the install, but I have to say my only complaint at this point is how cold it gets when I turn on the air. But that's a nice problem to have. :)"
Additional Photos
We provide HVAC sheet metal fabrication, blown in insulation with Owens Corning’s new AttiCat™ Expanding Blown-In PINK FIBERGLAS® and Solatube® installations to add light where you need it without the increasing your electric bill.
The SunSource® Home Energy System puts you in control of your monthly bills by creating and using solar energy, reducing your need for electricity from your utility provider.
Owners, Jeff and Cindy Faulkner
8 neighbors recently requested a quote
Recommended by93%of homeowners
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Avatar for Alanis Air HVAC
Alanis Air HVAC
5.0(
21
)
Central A/C - InstallDuctless Mini-split A/C - Install or ReplaceCentral A/C - Service or Repair

Serving Foster City, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Free estimates

Warranties offered

"I highly recommend this company to do your heating and air conditioning project. John Alanis and his crew did an excellent job and the pricing he gave us beat the competition. Thank you John and I’ll make sure to spread the word to my friends and relatives."
York Heat Pump
York 3 Ton heat pump
Coil removal
Condenser Removal
Ductwork

+4

Response time3 hrs
Response rate99%
32 neighbors recently requested a quote
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Avatar for Aire Serv of Campbell & Saratoga
Aire Serv of Campbell & Saratoga
4.9(
22
)
Central A/C - InstallDuctless Mini-split A/C - Install or ReplaceCentral A/C - Install - For Business

Serving Foster City, CA and surrounding areas

Approved

Super Service Award Winner

In business since 1991

Free estimates

Emergency services offered

"Great team. While the job is messy as they have to work under your house. Aire Serv was great to work with. We needed new ducts and boots and my house is now moving air better than it has in twenty years. Highly recommend Aire Serv."
Furnace install
Heat Pump - Condo Install
Heating & A/C Project
Water Heater Replacement
System Swap Out

+58

98 neighbors recently requested a quote
Recommended by57%of homeowners
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Avatar for Air Sharks
Air Sharks
5.0(
12
)
Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace

Serving Foster City, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2022

Free estimates

Emergency services offered

"Air Sharks are very professional and I think they did a good job on installing HP HVAC in our property."
Daikin Heat Pump Install
Daikin Heat pump Install and Duct Work
Before picture.
BEFORE
Daikin Heat Pump Install

+22

Response time1 day
Response rate100%
21 neighbors recently requested a quote
Request Quote
Avatar for Quality Comfort Heating & Air Conditioning
Quality Comfort Heating & Air Conditioning
4.9(
28
)
Central A/C - Service or Repair

Serving Foster City, CA and surrounding areas

Approved

In business since 2000

Free estimates

Credit card accepted

"The service tech was exceptional. My unit is a 30 year old HVAC system. Spare parts are challenging. He made it all work."
5 neighbors recently requested a quote
Recommended by100%of homeowners
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Avatar for Rittinger Heating and Air
Rittinger Heating and Air
5.0(
18
)
Central A/C - Service or RepairDuctless Mini-split A/C - Install or Replace

Serving Foster City, CA and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

*****669-669-2435*****We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business.

Service maintenance
Service maintenance
Service maintenance
Service maintenance
Service maintenance

+6

13 neighbors recently requested a quote
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Avatar for Comfort Energy Inc
Comfort Energy Inc
4.4(
371
)
Ductless Mini-split A/C - Install or Replace

Serving Foster City, CA and surrounding areas

Approved

In business since 2003

Free estimates

Emergency services offered

"Analyzed the system and explained what was happening, before the work was done only the fan was working on the air pump, after the fix it works just like new."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+12

Response time1 day
Response rate100%
12 neighbors recently requested a quote
Request Quote
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Air Conditioning FAQs, answered by experts

You need to know the square footage of your home first. Multiply that number by 20, which will get you the BTUs (British Thermal Units) needed to cool your home efficiently. Homes up to 1,000 square feet usually need a 1.5-ton unit; homes 1,000 to 1,200 square feet usually need a 1.75-ton unit, and homes 1,200 to 1,400 square feet usually need a 1.9-ton unit. Talk to a local pro for more specific advice on your home. 

Though it may seem redundant, you can absolutely have a central AC unit and a window AC in your home. In fact, if you place a window AC unit near your central air, it can help move the cooler air throughout your home. But doubling up on your AC methods can get pricey, so factor in cost accordingly.

The general rule of thumb for figuring out how much AC tonnage you need in your home is that for every 500 to 600 square feet of space you need to cool, you’ll need one ton of AC cooling power. So, a 1,000-square-foot home will need 2 tons of AC power. 

They can, but it’s not as common. Window AC units are much smaller than whole-house systems and less likely to develop refrigerant leaks or similar issues. As a result, you will rarely need to add a new refrigerant, limiting overcharging problems. However, it’s still important to leave refrigerant management in the hands of professionals when window units need work.

If your whole house is cold that’s one thing, but what if you only have a few rooms that are cold? First, you need to determine why this may be happening. A good place to start is to investigate the potential causes listed in this article—heat transfer, airflow, thermostat problems, humidity, and insulation. Once you’ve narrowed down the issue, you’d apply the same principles to the cold rooms as you would to the entire home.

The Foster City, CA homeowners’ guide to air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.

See all articles