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4.5

(531 reviews)

Top-rated heating and air conditioning pros.

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Avatar for Global Green Solutions
Global Green Solutions
5.0(
248
)

Serving Altadena, CA and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Top-notch installation! The new HVAC system is super efficient and the crew explained everything clearly. They handled the entire job with care. I feel the temperature difference immediately?very satisfied!"
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+24

Response time3 days
10 neighbors recently requested a quote
Recommended by7%of homeowners
Avatar for AC Dave Heating & Air
AC Dave Heating & Air
4.9(
93
)

Serving Altadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Emergency services offered

"We noticed a foul smell coming from one of the vents in our HVAC system. We turned the system off and called AC Dave. Dave sent Justin and James to troubleshoot the problem. They quickly found a tear in one of our ducts--and the remains of a dead rodent. They cut open the duct, cleaned it and resealed it. We had heat again, about an hour after they arrived. Very fast and competent service."
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+6

Response time7 hrs
7 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Air-Tech Air Conditioning & Heating Inc
Air-Tech Air Conditioning & Heating Inc
4.5(
202
)

Serving Altadena, CA and surrounding areas

Approved

In business since 1988

Free estimates

Warranties offered

"In preparation for replacing my HVAC system, I went through a few different estimates. The reason I chose Air-Tech was not because of price, but because I was impressed by the details provided to me. Rod was great. We went into the attic, reviewed all the components inside and out. And we discussed the scope of the work. Once I agreed, he gave me a start date\time. The crew showed up on time and worked hard for two days. Not only was I comfortable with Rod, but the crew was great. My new system is in place and I couldn’t be happier that I chose Air-Tech. If you’re in the market for a new HVAC system, do yourself a favor and call them. You won’t be disappointed."
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+8

Response time2 hrs
48 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Air Duct Professionals
Air Duct Professionals
4.7(
1,517
)

Serving Altadena, CA and surrounding areas

Approved

In business since 1990

Free estimates

Warranties offered

"Sabaz and his assistant were prompt and cordial. They did a neat job. I will call them again to service my HVAC ducts in the attic.
Thanks guys!
"
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+11

Response time2 days
1 neighbors recently requested a quote
Recommended by93%of homeowners
Efficiency Air, Inc.
4.8(
320
)

Serving Altadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 1985

Free estimates

Credit card accepted

"Can't recommend Dean and Efficiency Air enough. After getting quotes from 4 different companies we were lucky enough to try one more and I couldn't believe how much Dean knew about HVAC systems and all of the different brands, as well as being even on top of future HVAC government regulations and rebates! They do business the old fashion way and will work on the job until you are satisfied. Dean and Efficiency Air are what HVAC Legend is made of."
A/C Condensers
A/C Condensers
A/C Condensers
A/C Condensers
Canoga Park, Goodman A/C

+50

Response time7 hrs
100 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for HD MECHANICAL INC
HD MECHANICAL INC
5.0(
26
)

Serving Altadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2022

Free estimates

Emergency services offered

"THE OWNER; CHRIS ROBINSON WAS AMAZING, EXCEPTIONAL CUSTOMER SERVICE, GREAT PEOPLE SKILLS. UNBEATABLE PRICING ON UNITS & LABOR I HAD BEEN QUOTED VERY HIGH BY 4 OTHER COMPANIES, HD MECHANICALs PRICING WAS HONESTLY EXTREMELY AFFORDABLE. HIGHLY RECOMMENDED FOR ALL YOUR HVAC NEEDS!!"
Heating & A/C Project
Heating & A/C Project
Heating & A/C Project
Heating & A/C Project
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+14

Response time9 hrs
Response rate85%
54 neighbors recently requested a quote
Avatar for All City Plumbing, Air & Electrical
All City Plumbing, Air & Electrical
4.9(
270
)

Serving Altadena, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2009

Emergency services offered

Warranties offered

The industry's best technicians make the happiest customers. Turn to the pros at All City Plumbing, Air, & Electrical for all of your plumbing, HVAC, and electrical needs. Proudly serving San Bernardino, Riverside, Los Angeles, and Orange Counties. We have over 5000s 5 star reviews across the web from our thrilled customers. Our company goal is to make sure that we have 100% customer satisfaction. We have options and payment plans that can fit in everyones budget. We provide free estimates and you only pay when you're happy. It's no surprise we've received the Angie's List Super Service Award six years in a row! Established in 2009. ACP was created to deliver exceptional service with the highest quality of craftsmanship. We guarantee you will be happy with our services in that we offer a money back guarantee. Our technicians are regarded by their peers to be some of the best in the industry. Our service experts are continuously trained. There isn't a plumbing or hvac problem we can't solve. We have the experience, knowledge and focus to solve any problem you may have. Give us a call today and let us earn your confidence.

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+42

Response time10 mins
16 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for Temp Air System, Inc.
Temp Air System, Inc.
4.8(
54
)

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%
4 neighbors recently requested a quote
Avatar for Service Champions, LLC
Service Champions, LLC
4.4(
50
)

Serving Altadena, CA and surrounding areas

Approved

In business since 2000

Free estimates

Warranties offered

"Kayvan was a wonderful service tech! He was on time and professionally checked out the water heater and the HVAC system. He was so polite and friendly. He explained the need for a new filter in the heating unit and showed me photos of the unit located in the attic. He also offered to do a friendly deed for free, which I greatly appreciated, He’s a great asset to Service Champions!"
Area Drain Cleaning
Plumbing
Plumbing
Garbage Disposal
Drain Cleaning

+13

Response time4 hrs
Recommended by79%of homeowners
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Heating and Air Conditioning questions, answered by experts

While it is possible to add Freon to your AC unit yourself, it is not recommended. In fact, the U.S. Environmental Protection Agency (EPA) prohibits the handling of Freon without a license. Freon is a dangerous gas that can cause irreversible damage to your AC or yourself if not installed correctly. It is worthwhile to hire a professional to add Freon to your AC.

You may be able to clean mold from your air conditioner in some cases. If the mold growth only takes up a small area, you can use either vinegar or bleach mixed with water to remove it. Larger areas of mold should be left to the professionals, though. It's also a good idea to leave mold removal to the pros if you are sensitive to mold or have asthma. 

A dual evaporator coil is a specific design that allows the AC system to cool different compartments at different levels. It’s usually seen in refrigerators and similar appliances, but not in whole-house air conditioning systems. Talk with your AC technician about the best uses for a dual evaporator coil.

It depends on how fast an HVAC technician can resolve the issue. First, if there's a refrigerant leak, you’ll want to keep small children and pets out of the house. Next, you’ll want to turn off the AC unit to ensure no more freon enters your home. Finally, you’ll need an AC technician pro to come to your home and fix the leak immediately. Ultimately, it’s best to leave your home if you discover a freon leak—the risk of exposure is very high, and it’s not worth risking your health to stay.

Evaporator coils in HVAC systems typically last around 10 to 15 years. However, their life span can be longer or shorter based on factors like the frequency of your HVAC system usage, whether regular maintenance is performed, and environmental conditions. Regular maintenance, such as HVAC system cleaning and coil inspection, can extend the durability and efficiency of your evaporator coil.

The Altadena, CA homeowners’ guide to heating and air conditioning services

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