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TRUSTED BY WALTHAM, MA HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon969
    Verified heating and air conditioning services reviews

Find Heating and air conditioning pros in Waltham

Avatar for Druziako HVAC Inc
Druziako HVAC Inc
4.7(
157
)
Central A/C - InstallElectric Furnace / Forced Air Heating System - InstallHeat Pump - Install or Replace+6 more

Serving Waltham, MA and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

"I have been using Druziako HVAC since I bought my house in 1997. They are excellent to work with consistently provide the highest level of service. I would highly recommend them to anyone in need of HVAC services."
Aprilaire Dehumidifier
Attic Air Handler
Duct Cleaning before and After
Attic Ductwork
Aprilaire Humidifier

+3

Response time11 hrs
17 neighbors recently requested a quote
Recommended by95%of homeowners
Avatar for Peter Paone HVAC
Peter Paone HVAC
4.9(
24
)
Central A/C - Service or RepairCentral Air Cleaner - Repair or ServiceDuctless Mini-split A/C - Install or Replace+9 more

Serving Waltham, MA and surrounding areas

Approved

In business since 2019

Free estimates

Small jobs welcome

"Peter and Mark were very professional. I needed to replace the HVAC dampers and the communication with Peter was excellent and we had all questions answered ahead of time so we didnt have any last minute surprises. They showed up on time and installed the dampers and the HVAC control panel. Very thorough and clean with their work. I've already recommended them to my neighbors."
hvac
Ductwork
air conditioning
Mechanical
hvac

+1

Response time12 hrs
Response rate90%
1 neighbors recently requested a quote
Avatar for Genove Oil & Air Co
Genove Oil & Air Co
4.7(
217
)
Electric Furnace / Forced Air Heating System - InstallCentral A/C - InstallGas Furnace / Forced Air Heating System - Install+47 more

Serving Waltham, MA and surrounding areas

Approved

In business since 1977

Free estimates

Emergency services offered

"Excellent. I've had Genove install both gas and oil heating systems in my properties, most recently oil. They have also installed central air/hydro air and handle my oil delivery. The techs have always been polite & knowledgable. Their customer service is impeccable. As a landlord/home owner, I couldn't be happier with them handling all my HVAC needs and would recommend them to anyone."
Additional Photos
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Pics
Pics

+2

Response time12 hrs
Response rate100%
14 neighbors recently requested a quote
Avatar for Airco Home Comfort Services LLC
Airco Home Comfort Services LLC
4.7(
33
)
Ductless Mini-split A/C - Install or ReplaceBoiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For Business+46 more

Serving Waltham, MA and surrounding areas

Approved

In business since 1998

Free estimates

Warranties offered

"Joe explained various options (models, efficiency rating, attic vs. cellar installation, etc.) thoroughly, promptly followed through on my follow-up questions, and prepared a detailed & accurate quote. He measured the size of the house and cold-air returns to ensure the system was sized properly. He is a patient guy & very pleasant to work with. Scheduling the installation was painless, the installers (Steve and his assistant Derek) started on time, and worked diligently & efficiently.
Everyone is very experienced and knowledgeable, and all clearly take pride in their work. They kept in excellent communication with me throughout the installation. They were respectful of my home, my concerns, my pets, etc.
They stand by what they sell, too. This winter, about 18 months after it was installed, my tankless hot water heater had a factory defect that caused it to shut off. Steve came the day I reported the problem, was on the phone with the manufacturer for hours to diagnose the issue, and came back twice more to finish the repair (3 visits might sound absurd, but it wasn't Airco's problem, it was the manufacturer's, as they were misdiagnosing the issue). The unit is now working perfectly thanks to Steve's persistence. A bonus: Airco charged me for only a small portion of Steve's time from his initial visit. They ate the cost of his additional visits! These guys are golden.
"
Additional Photos
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Additional Photos

+4

Response time2 days
2 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Ace Hardware Home Services
Ace Hardware Home Services
4.5(
53
)
Central A/C - InstallElectric Furnace / Forced Air Heating System - InstallGas Furnace / Forced Air Heating System - Install+47 more

Serving Waltham, MA and surrounding areas

Approved (Corporate)

In business since 1967

Free estimates

Emergency services offered

"Our daughter and her husband are living out of the country, temporarily. When their leasees said the furnace was blowing cold air, we wanted the repair done quickly and at a good price. Unique Indoor Comfort Heating & Cooling responded right away and came to the property the same day we called. Very professional!"
Heat Pump
Mitsubishi Hyper Heat
Multiple Ductless Heat Pump Installation
Additional Photos
Additional Photos

+6

Response time1 day
Response rate100%
5 neighbors recently requested a quote
Avatar for Ken's HVAC Service
Ken's HVAC Service
4.8(
44
)
Central A/C - Service or RepairGas Furnace / Forced Air Heating System - RepairThermostat - Install or Replace+1 more

Serving Waltham, MA and surrounding areas

Approved

In business since 2021

Free estimates

Credit card accepted

"Ken's HVAC was immediately responsive to my call and came the next day. When we noticed an additional heating issue I called on Sunday and Ken picked up and scheduled to come out on Monday. He did, and we now have heat. Ken was thorough, professional, and explained everything he was doing. I felt very confident in his work."
Business card
My work
My work
My work
My work

+12

Response time8 hrs
Response rate93%
Recommended by93%of homeowners
Avatar for H L Bowman
H L Bowman
4.6(
420
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallElectric Furnace / Forced Air Heating System - Install+12 more

Serving Waltham, MA and surrounding areas

Approved (Corporate)

In business since 1946

Free estimates

Emergency services offered

"The appointment was made within 2 days of contacting them. The technician (Brian) was punctual for a 7:30 am appointment. Once there, Brian did a fantastic job of communicating the services that he was performing and kept me very informed about the status of the AC system. He found some issues that had been previously overlooked by former HVAC technicians and provided me with a very detailed understanding of what the outlook for my unit should be in the future. I noticed an immediate improvement in the cooling of the house as well as the air quality. I can't thank this company and this technician enough for being so professional in the way they conduct their business. I would recommend them to anyone in need of HVAC service."
Additional Photos
Additional Photos
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Additional Photos
Additional Photos

+6

744 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for Cotti-Johnson Heating-Cooling-Electrical
Cotti-Johnson Heating-Cooling-Electrical
4.7(
168
)
Gas Furnace / Forced Air Heating System - InstallElectric Furnace / Forced Air Heating System - InstallDuctless Mini-split Heating System - Install or Replace+4 more

Serving Waltham, MA and surrounding areas

Approved (Corporate)

Super Service Award Winner

In business since 1948

Free estimates

Emergency services offered

"I called the company on Sunday evening and they responded promptly early in the morning. My system was installed by them 3 years ago but somehow I missed last year's annual servicing. With the current heat wave it was severely underperforming. They sent out Robert Duclos within the hour. He diagnosed the problem---not enough Freon in the system, grass and mulch build-up in the compressor, valves buried under the landscaping--and fixed it all for the price of the annual service contract. I would definitely recommend them for anyone needing central a/c work."
Navien Install
Backflow
Outdoor Shower
Well Tank Replacement
Filtration Installation

+62

Response time10 hrs
76 neighbors recently requested a quote
Recommended by88%of homeowners
Avatar for JC Duct Cleaning
JC Duct Cleaning
4.9(
33
)
Air Ducts & Vents - Clean

Serving Waltham, MA and surrounding areas

Approved

Super Service Award Winner

Customers say: True professional

At John Carroll Duct Cleaning we are experts in the field, possessing over 35 years of experience and customer satisfaction. We offer free estimates, deep duct cleaning, and dryer vent cleaning performed with state of the art equipment and unparalleled customer service.

Additional Photos
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Response time11 hrs
Response rate100%
9 neighbors recently requested a quote
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Heating and Air Conditioning questions, answered by experts

No, a furnace is not the same thing as an AC, or air conditioner, but these are both parts of an HVAC system. They both use air ducts to transport cool or hot air around your home to achieve a comfortable temperature set by your thermostat. An AC runs on electricity, while a furnace can use different fuel sources.

If refrigerant levels are low, it can cause the evaporator coil to freeze up. Low freon causes a drop in pressure, which will make the coil too cold and cause moisture to freeze on the coil. Your system may be low on refrigerant because of a leak. 

Make sure to have maintenance performed twice a year, and contact your local HVAC technician if you suspect your system has low freon levels.

Here’s how AC professionals will clean your AC coils:

  1. Unplug the AC unit or turn off the breaker to the unit in your circuit breaker box.

  2. Remove the faceplate.

  3. Spray a vacuum hose attachment or compressed air can to remove debris, dust, dirt, and grime.

  4. Use a soft-bristled fin comb to remove stubborn caked-on debris.

  5. Use the vacuum hose to suck up any extra debris.

  6. Take a coil-safe cleaning solution and spray it onto the coils. Try to choose a no-rinse solution.

  7. Let the solution sit for at least 15 minutes.

  8. Gently wipe away loosened grime and debris with a microfiber cloth.

  9. Reattach the faceplate, plug in your AC system, or turn the breaker back on.

There are a few things you can do to make your AC repair technician’s job easier and your home more comfortable while you wait for AC repair:

  • Cut back trees, shrubs, and weeds around the outdoor compressor 

  • Clear a pathway inside and outside to your AC components

  • Set up a ladder for attic access if necessary

  • Pull your window AC out of the window and place in an easily accessible spot

  • Supplement with fans and open windows to help keep your house comfortable

If your AC suddenly stops working, the first thing to check is your thermostat settings. Ensure the thermostat is set to the appropriate temperature and mode (cooling). Sometimes, a simple adjustment or replacing the batteries in the thermostat can resolve the issue. If that’s not the issue, look to see if the circuit breaker tripped. These basic checks can often identify simple fixes before you need to call for professional assistance.

The Waltham, MA 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.