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Verified Reviews for Air Conditioning pros in Altadena, CA

*The Angi rating for Air Conditioning companies in Altadena, 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 Altadena, 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 August 11, 2026

Find Air conditioning pros in Altadena

Avatar for Global Green Solutions
Global Green Solutions
5.0(
248
)
Central A/C - InstallDuctless Mini-split A/C - Install or ReplaceCentral A/C - Install - For Business+2 more

Serving Altadena, CA and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Very happy with the new installation, replacement, and repair services for heating and air conditioning! The technicians were courteous, well-informed, and on time. They promptly resolved the problem and provided comprehensive explanations. A truly professional and trustworthy crew. Strongly suggested!"
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+24

Response time3 days
4 neighbors recently requested a quote
Recommended by7%of homeowners
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Avatar for AC Dave Heating & Air
AC Dave Heating & Air
4.9(
93
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+3 more

Serving Altadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Emergency services offered

"I had AC Dave preform three jobs for me over the past few years. (1) New ducts a few years ago. (2) Installed a mini-split heat pump in master bedroom this year. (3) Then a few months later I had him remove my old Central AC and replace it with an 18 SEER heat pump and new coil, all the while leaving my old furnace in place as a back up. Dave and his guys did a great job on all three projects, completing each one in a day. Highly recommended."
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+6

Response time7 hrs
Response rate100%
6 neighbors recently requested a quote
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Efficiency Air, Inc.
4.8(
321
)
Central A/C - Install

Serving Altadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 1985

Free estimates

Credit card accepted

"Efficiency Air Inc is a fabulous company with excellent customer service and trained professional installers. I received a quote to install a mini split air conditioner/heat pump and we were overjoyed of the quality of work we received. They showed up on time and installed the system with ease. The install Manager â Deanâ was a true leader and got everything needed accomplished. I would recommend Dean and crew to anyone needing quality service. Thank you again for everything. Your lifetime customer Nathaniel G Santa Clarita, CA"
A/C Condensers
A/C Condensers
A/C Condensers
A/C Condensers
Canoga Park, Goodman A/C

+50

Response time7 hrs
116 neighbors recently requested a quote
Recommended by95%of homeowners
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Avatar for Temp Air System, Inc.
Temp Air System, Inc.
4.8(
59
)
Central A/C - InstallCentral A/C - Service or RepairAir Ducts & Vents - Clean+1 more

Serving Altadena, CA and surrounding areas

Approved

In business since 2002

Free estimates

Credit card accepted

"We had Temp Air install our AC unit. The best decision we ever made. They were fast, reliable and dependable. Excellent customer service, did a phenomenal job. After a couple of years something was going on with our unit, I called them and immediately they send out a technician Juan, who was phenomenal. He explained what the issue was and resolved it asap! Highly recommend this company!"
Mini Split Installation
Mini Split Installation
Mini Split Installation
Mini Split Installation
Mini Split Installation

+14

Response time10 hrs
Response rate99%
9 neighbors recently requested a quote
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Avatar for McLay Services
McLay Services
4.8(
281
)
Central A/C - InstallCentral A/C - Service or RepairAir Ducts & Vents - Clean+2 more

Serving Altadena, CA and surrounding areas

Approved

In business since 1978

Free estimates

Emergency services offered

"They were very professional, on time, took the amount of time they said it would, and cleaned up afterwards. The ac is great"
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+3

83 neighbors recently requested a quote
Recommended by93%of homeowners
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Avatar for Help-Me HVAC LLC
Help-Me HVAC LLC
5.0(
27
)
Central A/C - Service or Repair

Serving Altadena, CA and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"Sayed Haroon was very happy professional and helpful and very informative, I would recommend him for any service and next time if there?s a problem with any of my air conditioning system I?m definitely gonna be dealing with him"
My jobs
My jobs
My jobs
2 neighbors recently requested a quote
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Avatar for Active Air Specialist Inc.
Active Air Specialist Inc.
5.0(
9
)
Central A/C - InstallCentral A/C - Service or RepairCentral A/C - Install - For Business+2 more

Serving Altadena, CA and surrounding areas

Approved

In business since 2012

Free estimates

Credit card accepted

"The team that came out to replace our home ducting was awesome! They were friendly and knowledgeable. They left everything neat and clean. Would defiantly recommend!"
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+7

63 neighbors recently requested a quote
Recommended by44%of homeowners
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Avatar for All City Plumbing, Air & Electrical
All City Plumbing, Air & Electrical
4.9(
271
)
Central A/C - InstallCentral A/C - Service or Repair

Serving Altadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2009

Emergency services offered

Warranties offered

"Troy and Max did an amazing job installing our water heater vent"
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+42

9 neighbors recently requested a quote
Recommended by97%of homeowners
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Avatar for Trinity Heating and AC
Trinity Heating and AC
5.0(
44
)
Central A/C - Service or Repair

Serving Altadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Warranties offered

"Just a "simple" ecobee install. Tech had a minor issue with my AC unit (it's 100%my unit) and didn't even attempt to upcharge us. Very honest and knowledgeable company. Will absolutely recommend to everyone I know."
Furnace Before
AC After
Furnace After
AC Before
Before - Furnace

+83

Response time3 hrs
Response rate98%
38 neighbors recently requested a quote
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Air Conditioning questions, answered by experts

While you’ll pay more upfront for a brand-new HVAC unit, you can save money in the long run. Here’s how to save on your new HVAC system:

  • When purchasing a high-efficiency system, your energy bills will be lower in the future.

  • You may be eligible for special offers from your local energy company.

  • Depending on the system, you may be eligible for HVAC rebates and tax credits.

  • Choose to replace your air conditioning unit and furnace simultaneously to save on labor and installation costs. 

The best way to compare HVAC quotes is getting a few detailed quotes from local companies with good reputations. Then, go over the quotes line by line. Protect yourself by insisting on in-person estimates that include equipment manufacturer names, model numbers, SEER ratings, amounts and numbers of materials, details of warranties on equipment and labor, and other specifics. 

Knowing the exact equipment and materials is the only way that you can fairly compare quotes. Quotes that are much lower than others can be a sign that the company isn’t providing the best quality service or materials.

No, it's not safe to keep using your unit when it's frozen. Not only can running a frozen unit lead to damage, but it can also potentially overheat, making it a fire hazard. Therefore, it's always best to turn off the AC unit as soon as you notice any ice.

The cost of annual maintenance depends on the type of HVAC system you have. AC service typically costs an average of $200 but ranges from $100 to $550. If your system needs repairs, the price will vary significantly depending on what needs fixing. However, addressing the issues as they arise can prevent further damage to your unit and keep it operating efficiently for much longer.

Yes, it’s best to turn off an AC unit that’s blowing hot air to prevent system damage and avoid expensive energy bills. If you let the AC continue running, it will put more strain on the condenser coil and compressor. Plus, if the AC is blowing hot air because of a refrigerant leak, it can also lead to a frozen evaporator coil.

The Altadena, 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