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TRUSTED BY JEFFERSON, MA HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon127
    Verified heating and air conditioning services reviews

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

Avatar for NV Heating and Air Conditioning
NV Heating and Air Conditioning
4.7(
237
)
Central A/C - Service or RepairCentral A/C - InstallHeat Pump - Install or Replace+14 more

Serving Jefferson, MA and surrounding areas

Approved

In business since 2013

Free estimates

Emergency services offered

"We hired NV heating to install a ductless split heater/ac system in our house. Right from the beginning Keith was very knowledgeable about the system to be installed. He also helped us navigate financing through Mass Save. The installation team was very professional, courteous and easy to work with. They finished on time and we would highly recommend them to anyone looking HVAC services."
New 275 gallon oil tank
Williamson oil fired warm air furnace
Fujitsu wall mounted unit
Bosch HVAC system
Fujitsu ceiling cassette

+6

Response time2 days
7 neighbors recently requested a quote
Recommended by92%of homeowners
Avatar for Everclean Air LLC
Everclean Air LLC
4.8(
43
)
Air Ducts & Vents - Clean

Serving Jefferson, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Emergency services offered

"I wanted to clean a second floor dryer vent hose that was loaded solid with lint. It was worse than I thought! Packed solid! It became evident that this was a messy and dangerous situation as it was a fire hazard. Through Angi I found Everclean and the co. was a perfect fit. HVAC companies don’t do dryer vents. Justin from Everclean was awesome and got the problem straightened out. He even discovered the dryer vent had become disconnected from outside dryer vent door! I can’t fit through the narrow attic hatchway as my shoulders are a bit too wide, so I depended on Justin. Finally, everything is buttoned up, and our clothes now dry in half the time. Cost was moderate and was money well invested. Dryer vent fire danger is now negligible compared to before. Along with neighbor hatred danger. I would hire Everclean again if needed again."
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+2

Response time7 hrs
Response rate100%
7 neighbors recently requested a quote
Avatar for All HVAC
All HVAC
5.0(
17
)
Central A/C - Service or RepairOil Furnace / Forced Air Heating System - RepairThermostat - Install or Replace+4 more

Serving Jefferson, MA and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"Nick called within an hour and came to my house at the end of his busy day. He was professional and explained everything as he diagnosed multiple issues with the HVAC unit. He had the system up and running before leaving. Highly recommended."
Response time6 hrs
8 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for Rodenhiser Home Services
Rodenhiser Home Services
4.4(
522
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallElectric Furnace / Forced Air Heating System - Install+47 more

Serving Jefferson, MA and surrounding areas

Approved

In business since 1928

Emergency services offered

Warranties offered

"We called during a heat wave on a holiday week when our A/C broke, so we knew it would take a while to get an appointment, especially as first-time customers. They were able to immediately schedule us for just under a week out, and let us know up top about how their services and payments, etc. work. We actually called another provider simultaneously to see if they could come earlier, but they just ended up giving us the runaround for days instead of just saying they were too busy. They confirmed a smaller time window the night before, and showed up first thing the next day. Abner was awesome, and it was such a huge relief to have someone so nice and professional, explaining everything like we didn't know anything about HVAC (because we don't). He broke down 6 options for us to move forward ranging from the minimum service fee for the cleaning all the way up to addressing everything he saw that was weighing down on the system. He explained which options we could wait on and which ones were higher priority, etc. It feels so rare to get a home service provider with this kind of professionalism these days. I wish these guys did automotive! I didn't rate them on price because I don't have a good comparison. But we will definitely be using them moving forward based on reliability, customer service, and professionalism."
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29 neighbors recently requested a quote
Recommended by86%of homeowners
KERO HVAC
4.6(
32
)
Central A/C - Service or RepairDuctless Mini-split Heating System - Install or ReplaceHeat Pump - Repair or Service

Serving Jefferson, MA and surrounding areas

Approved

In business since 2021

Free estimates

Customers say: Quick response

"Thought something was wrong with my Hvac system. Kero hvac called me and came out the next day. He was very honest and gave me great recommendations for my system. I would definitely recommend!"
Response time6 hrs
Response rate94%
Recommended by90%of homeowners
Avatar for Earth Green Dryer Vent & Duct Cleaning
Earth Green Dryer Vent & Duct Cleaning
4.6(
817
)
Air Ducts & Vents - Clean

Serving Jefferson, MA and surrounding areas

Approved

Super Service Award Winner

In business since 1998

Free estimates

Emergency services offered

"Earth Green did an awesome job in cleaning out my HVAC system. Troy and Scotty were very professional and did the job with ease and high quality. I would definitely recommend these guys to anyone!"
 Before cleaning
 After cleaning
Truck Mount Duct Cleaning
Blower Motor Cleaning
Response time5 hrs
102 neighbors recently requested a quote
Recommended by94%of homeowners
Avatar for VVS HVAC & Home Improvement Services LLC
VVS HVAC & Home Improvement Services LLC
5.0(
5
)
Heat Pump - Install or ReplaceCentral A/C - Service or RepairCentral A/C - Install+4 more

Serving Jefferson, MA and surrounding areas

Approved

In business since 2019

Free estimates

Emergency services offered

We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We offer a variety of HVAC services that are customizable to each individual project. You will find us to be competitively priced, paying close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction! \n

Boiler
Furnace installation
Furnace installation
Furnace installation
Furnace installation

+11

3 neighbors recently requested a quote
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Heating and Air Conditioning FAQs, answered by experts

A 10,000-watt generator can run a small to mid-sized central AC unit (typically up to 3 tons or 36,000 BTU) along with a few other appliances. However, larger AC units or additional loads will require a bigger generator. Consult a local generator installer to ensure you add the correct size generator to your home.

Whether an HVAC damper should be open or closed depends on the season, the zone it controls, and the temperature in that zone. In the summer, open upstairs dampers and close lower-level dampers to get the most efficient cooling possible. In the winter, do the opposite. Cool air will naturally flow down to lower levels, while warm air will rise. This keeps your system from working harder and helps prevent common AC problems.

While most air conditioners can last between 10 and 20 years, they will only last this long (or longer) if properly taken care of. Routine maintenance and inspections help keep your AC unit running in tip-top shape but understanding what factors will decrease its lifespan will also help keep your unit running cool.

Some things that shorten your AC’s lifespan include:

  • Extreme outdoor conditions, like high humidity or extensive salt spray 

  • Improper installation

  • Extended run times, either by the unit being too small or the thermostat setting too low

  • Not performing required maintenance

There are several AC unit problems to troubleshoot, but luckily you can identify them by keeping a close eye on your system. Look out for the following signs that your AC needs repair:

  • Unusual noises during operation

  • AC unit blows warm air

  • AC unit doesn’t come on or turn off with temperature changes

  • Strange odors come through the vents

  • AC unit cycles on and off rapidly

  • Indoor air is more humid or less comfortable than usual

  • AC unit keeps tripping your breaker

  • Fan in the outdoor compressor doesn’t operate when the AC is on

Capacitors are the most frequent part of an HVAC system to experience failure. These components are crucial for starting the motors that power the fans and compressor, but over time, they may become worn or fail due to electrical surges or regular wear and tear. When capacitors malfunction, HVAC systems may experience decreased heating or cooling efficiency, or even total system failure. Replacement or maintenance of capacitors is a common requirement for the optimal functioning of HVAC systems.

The Jefferson, 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.