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TRUSTED BY THOUSAND OAKS, CA HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon742
    Verified heating and air conditioning services reviews

Top-Rated Heating and air conditioning pros in Thousand Oaks - Updated Nov 2026

Avatar for AC Dave Heating & Air
AC Dave Heating & Air
4.9(
93
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallBoiler or Radiator Heating System - Install or Replace+31 more

Serving Thousand Oaks, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2006

Free estimates

Emergency services offered

"AC Dave is a skilled and trustworthy HVAC company that does quality work at a competitive price. I had an aging four ton system that was on its last leg. My funds were tight at the time, so they suggested installing more efficient ducting to extend the system’s life. That was three years ago, which allowed me to save for the inevitable expense of replacement. And when that time came, I was given a comprehensive estimate and the installation went smoothly. They also did a follow up to tweak the system for maximum reliability. AC Dave is a small company, so you may not get next-day service, but they will work with you and stand by their work. In today’s less and less neighborly world, that is a real asset."
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+6

Response time7 hrs
Response rate100%
3 neighbors recently requested a quote
Avatar for Air Duct Professionals
Air Duct Professionals
4.7(
1,518
)
Air Ducts & Vents - Clean

Serving Thousand Oaks, CA and surrounding areas

Approved

In business since 1990

Free estimates

Warranties offered

"This review is about Air Duct Professionals and I want you to know that I finally found a company that was honest and professional. Because when I was at the end of my wits trying to figure out who was telling me the truth, I called Ed Mack the owner and he was reassuring that my home was not that old to be having all these problems. He referred me to a website for the Air Duct Cleaners Association and read about what air duct cleaning really does. So I had Air Duct Professionals come out to the inspection and they have an actual HVAC guy on their staff. Immediately looking at how new and well maintained our air system was in the attic, he told us those other companies were trying to scam us. Air Duct Professionals did a great job cleaning out all of our air ducts and dryer vent and cleaning up after themselves. I whole-heartedly recommend this company for their professional work and honesty."
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+11

Response time1 day
2 neighbors recently requested a quote
Recommended by92%of homeowners
Efficiency Air, Inc.
4.8(
321
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallHeat Pump - Install or Replace

Serving Thousand Oaks, 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
60 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for United Air Heating & Air Conditioning, Inc.
United Air Heating & Air Conditioning, Inc.
5.0(
51
)
Central A/C - InstallAir Ducts & Vents - CleanCentral A/C - Service or Repair+13 more

Serving Thousand Oaks, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2007

Free estimates

Emergency services offered

"I needed a smart thermostat installed and Victor, owner of United Air Heating & Air Conditioning, did a great job. He contacted me right away, quoted me a very fair price and we set up an appointment within a few days. He did a very thorough job installing the thermostat, plus took the time to explain some of the basics to me about programming it, etc. He also put down a drop cloth to protect my floor, which I noted. Other contractors have just let debris fall onto the floor (and left it there for me to clean up). He also gave me some helpful advice about my ductwork and other things. He was very personable, professional and his service was very reasonably priced. I can definitely recommend him and will hire him for any future HVAC needs. Thank you, Victor!"
Level 3 Maintenance
Fan Motor Cleaning
Level 3 Maintenance
before photo of the entire indoor blower & hou
Before photo of Level 2 maintenance on Furnace

+20

Response time3 hrs
Response rate86%
7 neighbors recently requested a quote
Avatar for Help-Me HVAC LLC
Help-Me HVAC LLC
5.0(
27
)
Electric Furnace / Forced Air Heating System - RepairCentral A/C - Service or RepairGas Furnace / Forced Air Heating System - Repair+2 more

Serving Thousand Oaks, CA and surrounding areas

Approved

In business since 2025

Free estimates

Emergency services offered

"Haroon provided excellent HVAC service from start to finish at Help-Me HVAC LLC. He was professional, punctual, and courteous, and he took the time to explain everything clearly. The service was efficient, the workmanship was excellent, and the whole experience was smooth and stress-free. I would definitely recommend Help-Me HVAC LLC and Haroon for reliable HVAC service."
My jobs
My jobs
My jobs
1 neighbors recently requested a quote
Avatar for Around The Clock Heating & Air Conditioning, Inc.
Around The Clock Heating & Air Conditioning, Inc.
4.5(
836
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallHeat Pump - Install or Replace+8 more

Serving Thousand Oaks, CA and surrounding areas

Approved

In business since 1967

Free estimates

Emergency services offered

"My HVAC unit stopped producing heat so I called the folks at around the clock. They offered to come out the same day and after taking a look up on our roof determined it was a faulty control board. We talked a little about the lifespan of the unit and that while it was probably going to need to be replaced in the next 5 years or so, it made more sense to simply replace the board today. So he scheduled an appointment for the following day to come back with the replacement board. 1 day later and 15 minutes of work and I have heat again."
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+10

Response time1 day
21 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Active Air Specialist Inc.
Active Air Specialist Inc.
5.0(
9
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallDuctless Mini-split A/C - Install or Replace+16 more

Serving Thousand Oaks, CA and surrounding areas

Approved

In business since 2012

Free estimates

Credit card accepted

Here at Active Air Specialists, we sustain our business on quality and integrity. With over 20 years of experience we are experts in the Heating and Cooling trade and are committed to quality from the beginning to the end of your project. please call our office @ 888 410 0677 We look forward to earning your business. Give us a call or click to schedule a quote today!

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+7

112 neighbors recently requested a quote
Recommended by44%of homeowners
Avatar for S.V. Heating and Air Conditioning
S.V. Heating and Air Conditioning
4.7(
18
)
Central A/C - InstallThermostat - Install or ReplaceCentral A/C - Service or Repair+14 more

Serving Thousand Oaks, CA and surrounding areas

Approved

In business since 1992

Emergency services offered

Warranties offered

"You can tell Rob has been servicing HVACs for years. He conducted a diligent inspection of the air conditioning system at my new home and walked me through every aspect of it's condition, which gave me a real peace of mind. He's very transparent with his pricing too. I'll be sure to call upon him for my next service."
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Response time3 hrs
11 neighbors recently requested a quote
Recommended by100%of homeowners
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Heating and Air Conditioning FAQs, answered by experts

Yes, but they don’t feel the same as an AC-cooled room. You’ll feel cool, moist air, opposite from an HVAC system that dries the air as it cools. Ventless units also have less tonnage than alternatives like ductless and central air, which means they aren’t as capable of quickly cooling large spaces or circulating cold air.

The American Society of Heating, Refrigerating, and Air-Conditioning Engineers, or ASHRAE, sets the standard guidelines for air changes per hour in homes and businesses. The International Residential Code, or IRC, also sets ACH requirements for residences and bases those requirements off of ASHRAE standards plus climate specifics related to your location.

The cost to add Freon to an AC ranges from $100 to $350. It can increase up to $600 for large AC units requiring much more coolant. The cost also depends on how much refrigerant your unit needs. If only a small amount of Freon leaked out, your cost would be on the lower side. A complete replacement of all the required refrigerant can get expensive.

If you’re planning an AC replacement, choosing an AC with a higher SEER rating may save you money in the long run. Tax credits could cover as much as 30% of the job, and you’ll notice smaller utility bills (particularly if you live in a hot climate where you need to constantly run the AC). Generally, you can expect to pay between $350 and $1,500 for each SEER rating increase. Weigh the cost against your typical utility bill to figure out what’s worth it to you.

No, it's not advisable to only replace the outside AC unit connected to your system. AC units are designed to work as a cohesive system, and older units work differently than newer units. Therefore, replacing only one component can lead to incompatibilities that affect the system’s performance. Replacing one component can void your warranty, costing you money for repairs.

The Thousand Oaks, 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.