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  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon247
    Verified heating and air conditioning services reviews

Find Heating and air conditioning pros in Knightsen

Avatar for Smart Heating and Air Conditioning, Inc.
Smart Heating and Air Conditioning, Inc.
5.0(
16
)

Serving Knightsen, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Emergency services offered

"Smart Heating and Air Conditioning was very responsive and came out when we really needed them. We were without heat as our old furnace no longer worked and our AC was on its last leg. Mike came out to give us a quote which was the best out of three that we had. He went over all options with us and now we are very satisfied to have a new and efficient heating and AC system. They lived up to their name as well, by upgrading my thermostat to a WiFi one that added that SMART touch to my system."
Additional Photos
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+27

Response time1 day
21 neighbors recently requested a quote
Recommended by78%of homeowners
Avatar for Albert Nahman Plumbing, Heating, and Cooling
Albert Nahman Plumbing, Heating, and Cooling
4.4(
719
)

Serving Knightsen, CA and surrounding areas

Approved (Corporate)

In business since 1981

Free estimates

Warranties offered

"The crew from Albert Nahman did a great job from start to finish. The project was to replace the original ductwork in our 60 year old house. Tom provided excellent advice for the estimate then Bryan’s crew did the job, 2 days, within a week of my acceptance of the proposal. Great work."
Living room Mini-Split
Aquasana home Filtration
Almost no disturbance at EBMUD meter
Navien with filtration to protect the heat exchanger
New house valve and Pressure Reducing Valve

+73

Response time8 hrs
Response rate99%
55 neighbors recently requested a quote
Avatar for Tyndall HVAC Inc.
Tyndall HVAC Inc.
4.4(
23
)

Serving Knightsen, CA and surrounding areas

Approved

In business since 2004

Free estimates

Warranties offered

"They showed up early, he had the part on his truck he replaced the device in HVAC unit and had me up and running in no time. He was very nice, very kind and very polite."
Peter Tyndall (Owner)
Our Trucks
New unit Installed
Additional Photos
Additional Photos

+5

Response time1 day
13 neighbors recently requested a quote
Recommended by80%of homeowners
Avatar for Tyndall HVAC, Inc.
Tyndall HVAC, Inc.
4.2(
108
)

Serving Knightsen, CA and surrounding areas

Approved

In business since 2003

Free estimates

Credit card accepted

"Truthfully, we had angst about calling for service because of past experience with other HVAC vendors. They always said the same thing, our system is "old" and we need a new one. Very expensive! We called for service, not a hard sell! Hence, we never used the same one twice. However, Tyndall gave me the impression, whether right or wrong, that they would be less likely to do this so I decided to try them. They kept me informed of their arrival status, since they squeezed me in at the end of their work day the same day I called. So, communicative and accommodating! After running several tests, they determined it was an electrical problem and nothing to do with the unit itself. They also said our unit doesn't need replacing - that's a first! They didn't do any unnecessary service or repair to run up the bill or even try to convince us it was needed. We were only charged the minimum fee as quoted. We were able to repair our air conditioning without the "hard-sell angst". So, thorough and honest! Unlike the other HVAC vendors we've used, we definitely will call them if we need service again!"
Response time1 day
20 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Guerrero's Heating & Air Conditioning
Guerrero's Heating & Air Conditioning
4.7(
61
)

Serving Knightsen, CA and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

"Outstanding customer service. Checked everything out and insured all components working normally. If you are looking for a honest HVAC technician, this is the company to go with."
Response time3 hrs
Response rate87%
12 neighbors recently requested a quote
Avatar for Ramirez Duct Cleaning
Ramirez Duct Cleaning
4.8(
91
)

Serving Knightsen, CA and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"Antonio did a fantastic job. He cleaned every HVAC vent and ducting, the dryer vent and replaced the ducting between the dryer and the wall connection, all bathroom exhaust vents and the furnace blower and exchanger. Super clean. I was amazed on how much crud cam our of our systems. Excellent attention to details."
Response time6 hrs
14 neighbors recently requested a quote
Recommended by97%of homeowners
Avatar for S.C. Home Repair
S.C. Home Repair
4.8(
40
)

Serving Knightsen, CA and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

"Josh did a thoroughly excellent job replacing the flooring in my rental unit. His attention to detail was spectacular, and the floor is meticulously and beautifully installed. He did what he said he'd do, stayed within the estimate, and did just fantastic work."
Handyman Services Project
Kitchen Floor, cabinets appliances.
Carpentry, handrails and decks.
Widened closet opening and replaced doors. Added trim around windows and new Luxury Vinyl Plank flooring
Remodeling - General Project

+136

Response time1 day
Recommended by91%of homeowners
Jim's Air Systems
4.5(
11
)

Serving Knightsen, CA and surrounding areas

Approved

In business since 1978

Free estimates

Warranties offered

"Jim's Air Systems had the best value for my dollar. They supplied me with better equipment than they quoted for the same price. They completed the entire installation in about five hours. They protected my floors with tarps and were very careful to protect my walls as they moved equipment in and out. Josh, the son of the original Jim, was on the job working with the other two installers. They performed above my expectations. They left my home and yard as clean as if they had never been there. The new furnace is wonderful and is already saving me money on my P.G. & E. bill. I would recommend Jim's Air Systems unconditionally to anyone in need of a new furnace and AC system. This is a family business that has been supplying and installing systems since 1976. They take personal pride in doing an excellent job. They did not sell me anything that I did not need and provided me with a much cleaner and easier-to-service installation than my existing system. They are the best!"
Response time11 hrs
Response rate97%
81 neighbors recently requested a quote
Avatar for Comfort Home Heating & Air
Comfort Home Heating & Air
5.0(
2
)

Serving Knightsen, CA and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

"Juan and his team were top tier professional. From the initial consultation to the hvac installation, they handled everything with care. Juan was so thorough answering my questions, the install was done in time, and everything was to spec. When I contacted him with an issue after install, him and his business partner came to take care of things immediately. I wouldn’t hesitate to recommend them in a heartbeat. So grateful for the work they did with removing our furnace and installing a split unit heat pump. Thank you Juan!"
Response time7 hrs
Response rate100%
10 neighbors recently requested a quote
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Heating and Air Conditioning questions, answered by experts

Some HVAC systems tend to use R410A refrigerant, although if you have an older model it may be using R22. R22 is banned due to its harmful environmental and health impacts, and it is a sign that your AC unit is old enough to consider a replacement and the significant efficiency gains that could come with it.

High humidity is one of the most common reasons for air vents to sweat or produce condensation. When the cool, dry air from your HVAC unit meets warm and moist air in your home, it will cause condensation. Insulating your ductwork can help prevent this. If you live in a very humid region, a dehumidifier can also help.

An air conditioner’s watt usage depends on multiple factors, including the type of AC unit, its size, and how often you use it. With that said, most central air conditioners consume between 3,000 and 3,500 watts. Meanwhile, window AC units use 900 to 1,400 watts, and portable air conditioners consume 2,900 to 4,100 watts.

While spending money once or twice a year to tuneup your AC and furnace might seem like a waste of money, think again. The cost of HVAC maintenance is far less than the cost of replacing your furnace or AC unit, regardless of the type of HVAC system you have. Paying this smaller fee now will help you avoid paying much more significant costs in the future. Not to mention, having a serviced AC and heating system will help keep your home comfortable, no matter the season. 

Yes, you can clean your air conditioner filter as a temporary fix for cleaning up dirt, but you’ll eventually need to replace it once the dust starts to accumulate. Use a vacuum with a hose attachment to clean your air filter at least once per year or more often if you have pets.

The Knightsen, 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.