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Avatar for Smart Heating and Air Conditioning, Inc.
Smart Heating and Air Conditioning, Inc.
5.0(
18
)
Central A/C - InstallCentral A/C - Service or RepairCentral A/C - Service or Repair - For Business

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
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+27

Response time1 day
36 neighbors recently requested a quote
Recommended by68%of homeowners
Avatar for Guerrero's Heating & Air Conditioning
Guerrero's Heating & Air Conditioning
4.7(
61
)
Central A/C - Service or RepairCentral A/C - Service or Repair - For Business

Serving Knightsen, CA and surrounding areas

Approved

In business since 2011

Free estimates

Emergency services offered

"I was fortunate to receive service on the same day I called. My issue was difficult to diagnose, as many have tried before. They were willing to step in and try to resolve my issue for good. They were successful at their first attempt. I am grateful to Guerrero Heating & Air this Labor Day weekend of 100*F+ weather."
Response time3 hrs
Response rate87%
7 neighbors recently requested a quote
Avatar for Albert Nahman Plumbing, Heating, and Cooling
Albert Nahman Plumbing, Heating, and Cooling
4.4(
721
)
Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace+3 more

Serving Knightsen, CA and surrounding areas

Approved (Corporate)

In business since 1981

Free estimates

Warranties offered

"This is the third time I have used Albert Nahman. This time was for a water leak with an unclear origin. They did a great job diagnosing the problem and took the time to explain what they found and offer options on potential fixes. I really appreciate the care their plumber took in tracking down the problem and providing a realistic quote for the cost and time to fix the problem. They also arrive on time and do a great job cleaning up after the work is done. A+++ company. Will definitely use them again the in future."
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 rate100%
47 neighbors recently requested a quote
Jim's Air Systems
4.5(
12
)
Central A/C - InstallCentral A/C - Install - For BusinessDuctless Mini-split A/C - Install or Replace

Serving Knightsen, CA and surrounding areas

Approved

In business since 1978

Free estimates

Warranties offered

"I found Jim's Air Systems through HomeAdvisor, and Josh was the first contractor to reach out to me personally, not through an automated service. From the start, communication with him was excellent. I provided him with a detailed description of the job, along with model numbers and photos of my existing system. He reviewed everything carefully rather than giving me a quick, generic quote. I received another bid for comparison, but the other contractor was significantly more expensive and wanted to upsell me. It was refreshing that Josh understood I had done my research, knew what I wanted, and didn't pressure me into unnecessary upgrades. Josh's team arrived on time, completed the work as scheduled, obtained the required permit, and left my home as clean as they found it. Overall, a great experience and a solid value. I wouldn't hesitate to recommend them."
Response time11 hrs
Response rate100%
88 neighbors recently requested a quote
Avatar for Tyndall HVAC, Inc.
Tyndall HVAC, Inc.
4.2(
108
)
Central A/C - InstallDuctless Mini-split A/C - Install or ReplaceCentral A/C - Install - For Business+1 more

Serving Knightsen, CA and surrounding areas

Approved

In business since 2003

Free estimates

Credit card accepted

"My AC stopped working last November, and since then i had 4 contractors i called to fix it, i was turned down by everyone. i called Tyndall and peter came out and talked about it with me, actually troubleshot it, and 2 days later had parts and fixed it. i would give them 6 stars if i could. im so glad to have my ac running again. my recommendation, if you want something done, call Tyndall, because the rest of the contractors seem to just say its not fixable and leave without even looking at it. these guys were the first people that listened, then looked at the unit before declining service, and then actually fixed it. 10/10 great job and thank you."
Response time1 day
13 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Tyndall HVAC Inc.
Tyndall HVAC Inc.
4.4(
23
)
Central A/C - InstallCentral A/C - Install - For BusinessCentral A/C - Service or Repair+3 more

Serving Knightsen, CA and surrounding areas

Approved

In business since 2004

Free estimates

Warranties offered

"Vendor was responsive in scheduling visit.  However, they did not show up until about a couple of hours beyond a 2 hour window so ended up waiting for several hours with my tenant.  Was told coupon could not be used because there was malfunction in AC (ended up using coupon at another rental).  Did not fix problem but quoted replacement unit that turned out to be quite high.  Another vendor eventually addressed the issue by cleaning the unit.
"
Peter Tyndall (Owner)
Our Trucks
New unit Installed
Additional Photos
Additional Photos

+5

Response time11 hrs
Response rate100%
10 neighbors recently requested a quote
Avatar for Bay Area Comfort Solutions HVAC
Bay Area Comfort Solutions HVAC
5.0(
3
)
Central A/C - Service or RepairCentral A/C - Service or Repair - For BusinessDuctless Mini-split A/C - Install or Replace

Serving Knightsen, CA and surrounding areas

Approved

In business since 2017

Free estimates

Credit card accepted

"Mike and his crew are great. We have used them before for smaller repair work and they were excellent for that too. This was a major projectâ ¦ replacing the old, worn out heating and air conditioning units in a house we bought and are renovating to move in. They did a great job!"
Response time2 days
Recommended by100%of homeowners
Avatar for Comfort Home Heating & Air
Comfort Home Heating & Air
5.0(
2
)
Central A/C - InstallCentral A/C - Service or RepairCentral A/C - Service or Repair - For Business+1 more

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%
6 neighbors recently requested a quote
Avatar for Villa Handyman - Unlicensed Contractor
Villa Handyman - Unlicensed Contractor
4.6(
47
)
Air Ducts & Vents - CleanWindow A/C Unit - Service or Relocate

Serving Knightsen, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2010

Free estimates

Customers say: True professional

\nWith over 10 years' experience, we work hard to bring each customer the best possible service and quality available. We look forward to working with you on your next project. We welcome your questions, and thank you for your interest. \n

New remodel kitchen
Main water line replace
All cities projects well
All cities projects well
All cities projects well

+9

Response time4 hrs
Response rate89%
5 neighbors recently requested a quote
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Air Conditioning questions, answered by experts

Yes, adding central air can increase your home value by as much as 10%. Generally speaking, prospective buyers prefer a central AC system over a ductless system or room-by-room AC units. That’s because central air conditioning blends into the home easier than individual room air conditioners and typically has less equipment to maintain.

It depends on the type of AC unit and the extent of the mold growth. For example, if you have a small amount of mold in your central air conditioner, it’s worth cleaning it to protect your HVAC system and your health. In situations like these, you can often remove the mold yourself in a couple of hours. On the other hand, if you have a portable AC unit with a severe mold problem, it makes more sense to buy a new one. On average, replacing a portable AC unit costs $100 to $500.

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.

There are a few ways to determine if a vent is open or closed. You can inspect the vent and examine the position of the fins. If there are spaces between them, the vent is open. If the fins are flat and touching, the vent is closed. You can also stand under the vent when the system is running to see if you feel air flowing through it.

An undersized whole-house generator has the potential to overheat and shut down when you try to run a central AC system. This scenario can not only damage the whole-house generator, but can also trip your home’s breakers or cause electrical damage. To avoid this situation, hire a local generator installer to correctly size your whole-house generator.

The Knightsen, CA homeowners’ guide to air conditioning services

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