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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 - InstallGas Furnace / Forced Air Heating System - InstallElectric Furnace / Forced Air Heating System - Install+6 more

Serving Waltham, MA and surrounding areas

Approved

In business since 1990

Free estimates

Emergency services offered

"I have a two-story single family house. Last year, Druziako HVAC replaced my first floor AC with a Carrier heat pump. I quoted 5 companies, and Druziako was honest and gave me best pricing. The heat pump worked great in summer and winter. This year I hired them again to replace my 2nd floor AC. The whole team are friendly, helpful, and very patient. Installation went smoothly and quickly. I cannot be happier with the pricing and quality of the work. I will recommend them without any doubt. Thank you very much!"
Aprilaire Dehumidifier
Attic Air Handler
Duct Cleaning before and After
Attic Ductwork
Aprilaire Humidifier

+3

Response time11 hrs
18 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 did an excellent job tuning up my A/C system. He was extremely diligent in making sure my A/C unit was up to speed for cooling for the upcoming summer weather. I know I will most likely need a new system installed in the near future as this one is on it's last legs. I know who to call when I need a new A/C unit installed and it will be Peter!"
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
Additional Photos
Additional Photos
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
)
Gas Furnace / Forced Air Heating System - RepairBoiler 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

"We installed a Fujitsu mini-split A/C and heat pump because installing duct work was not an option. The entire process from getting a quote to completing the installation couldn't have been any better. Joe went over the full scope of the project including the ramifications if any additional work was needed. I don't think one could find a better HVAC company than Airco!"
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+4

Response time2 days
1 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

"I've used this company for a few years, beginning with an issue I had where I needed some emergency assistance with an a/c system leaking water into the house. They fixed the issue and it cost far less than I thought it would. I've also used them for a couple heating repairs, annual furnace cleaning and a/c maintenance. I am about to hire them again since the a/c system is dying and it will need replacement since it's more than 20 years old. I would highly recommend Unique Indoor Comfort to anyone in need of a good HVAC/Heating company."
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 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

"Excellent. 2 perfectionist electricians, Sam and Steve affiliated with Cotti Johnson HVAC & Electrical, completed the comprehensive work with meticulous attention to details in half a day. They are knowledgeable, kind professionals. If I need any electrical work in the future, they are the first to contact in my list."
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

"John responded immediately with my request to have all my ducts and dryer vents cleaned. I also wanted to have my 3-bathroom fans and two ceiling fans done. John sent me a quote for the work that needed to be completed. I hired him, he immediately gave me several days that he had available to choose from to come and do the work. John arrived on time with Steve, they were great, friendly, professional, and very thorough. John explained everything and communicated with me on things that he found during the work. There are very few professionals around that care about their customers, John is one of them who cares, I mean that sincerely. If you are looking for a professional to do this work, I definitely recommend John and Steve. I am recommending John to anyone that I know who is looking to have this work done. Thank you, John and Steve, for everything you did to make our home cleaner."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Response time11 hrs
Response rate100%
9 neighbors recently requested a quote
Avatar for Emerald HVAC LLC
Emerald HVAC LLC
5.0(
15
)
Central A/C - Service or RepairHeat Pump - Repair or ServiceHeat Pump - Repair or Service - For Business

Serving Waltham, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Small jobs welcome

"My central AC unit has been broken for several years. intermittently working during hot summers. I've had several HVAC companies come to diagnose and all of them told me different things: replace the whole system, new lines, etc. potentially costing tens of thousands of dollars. So I decided to troubleshoot by myself and pinpointed the issue: the filter dryer needed to be replaced. No company wanted to do this small job. I called Emerald HVAC and told them about my issue, they sent in José, who diagnosed the issue to be what I said. He replaced the filter dryer and the AC unit works perfectly now after several years! In short, Emerald HVAC will be my first choice for any HVAC work in the future. They are honest, professional, and reasonably priced. I recommend them without reservation!"
Response time1 day
Response rate93%
27 neighbors recently requested a quote
CJC HVAC
4.9(
26
)
Central A/C - Service or RepairThermostat - Install or ReplaceThermostat - Repair or Reprogram

Serving Waltham, MA and surrounding areas

Approved

In business since 2016

Emergency services offered

Small jobs welcome

"Chris was fantastic! Our usual HVAC company couldn't come out until over 48 hours later, and it was in the 90's out - the house was getting hot! Chris was recommended on a local FB page and he was able to come that day. He was professional and answered all our questions in terms we could understand. We hadn't had out unit cleaned in the 4 years we've lived in our home. Chris offered to come out and give it a good cleaning the following week for a very reasonable price. When he was finished, the unit was quieter and it honestly seems more efficient. Chris will be our new "regular" HVAC person! I will recommend Chris to my friends and family needing HVAC service."
Refrigeration leak repair
Hard Start Kit
Rebuild
Response time2 hrs
Recommended by100%of homeowners
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Heating and Air Conditioning questions, answered by experts

Most HVAC surge protectors last about three to five years, depending on how often your home experiences blackouts or brownouts. If your unit is susceptible to more frequent electrical surges, consider replacing your surge protector every two years. Consult your HVAC professional to determine when and how often to replace your HVAC surge protectors.

A frozen coil can cause permanent damage to your HVAC system and lead to costly repairs if not fixed. It can cause the unit to overheat and also cause the compressor to fail. It’s vital to turn the unit off if the coil is frozen and address the issue as soon as possible. 

If your AC condenser is nearing the end of its life, it might leak fluid or make loud or unusual sounds (like grinding or hissing). You might also notice that it isn’t heating your home as evenly or effectively as it once did. Also, an aging condenser will have to work harder to cool your home, which may force it to use more power and drive up your utility bills.

Yesh, heat pumps can easily cool homes when the weather reaches over 100 degrees Fahrenheit, just as powerful air conditioners can. The key is sizing the heat pump correctly for the size of your home and your climate. A local heat  pump professional can help you determine the right size and type for your home.

Most AC repair technicians will take between two and six hours to carry out repairs, depending on the work needed and the accessibility of the unit. For example, recharging refrigerant lines should take one to two hours to service, while replacing a compressor, blower fan, or other major components can take five to eight hours. You can ask your AC repair technician how long they expect the job to take, but just in case, you should plan on being home and available for most of the day.

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.