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Top-Rated Air conditioning pros in Jefferson - Updated Nov 2026

Avatar for New England Quality Air Solutions
New England Quality Air Solutions
4.7(
296
)
Air Ducts & Vents - Clean

Serving Jefferson, MA and surrounding areas

Approved

In business since 2005

Free estimates

Offers commercial services

"New England Quality Air Solutions is a small family-run operation. our ducts hadn't been cleaned in a few years and I needed to have it done before going in for a lung transplant. Debbie in the office called me right back and gave me a very detailed quote. I scheduled the duct cleaning, along with cleaning the dryer vent. Debbie gave me a window during which the workmen would arrive and that they would call when they were on their way from their previous job. They called and showed up right on time during that window. Mario and Sergio explained how they do the work, verified the number of vents, mains, and returns, and were able to do most of the cleaning from the basement, using a rotating brush and vacuum. Then they went to each room and inspected those vents to ensure that they were clean. They showed us pictures of what was in the vents! They also did a treatment for mold, mildew, etc., and made sure I was not in the house for the few minutes that the treatment was being done, due to my lungs. Their pictures of the dryer vent showed almost complete clogging and they cleaned that also. I found them very professional and thorough, both in their explanations and in their work. I will definitely use them again and will recommend them to everyone."
Before Cleaning-Air Ducts
Air Duct - After Cleaning
Before-Air Duct Cleaning
Air Duct Cleaning
Before-Air Duct Cleaning-Commercial

+6

Recommended by98%of homeowners
KERO HVAC
4.6(
32
)
Central A/C - Service or Repair

Serving Jefferson, MA and surrounding areas

Approved

In business since 2021

Free estimates

Customers say: Quick response

"We had a major problem with our A/C and we contacted Kero. We were very satisfied with the service quality, response, honesty, punctuality and cost. A few months later, we contacted him for our Heating system maintenance. And as usual he did a very professional service. We highly recommend Kero for any HVAC services you might need."
Response time6 hrs
Response rate94%
Recommended by90%of homeowners
Avatar for Emerald HVAC LLC
Emerald HVAC LLC
4.9(
16
)
Central A/C - Service or Repair

Serving Jefferson, 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%
34 neighbors recently requested a quote
Avatar for Dr. Clean-Air Restoration
Dr. Clean-Air Restoration
4.9(
99
)
Air Ducts & Vents - Clean

Serving Jefferson, MA and surrounding areas

Approved

In business since 2014

Free estimates

Emergency services offered

"Ruben was on time and extremely thorough in his explanation of my overall system and the services I requested he perform. I had air duct cleaning and sanitizer with dryer vent. He completed the job in about for 3 hours which is exactly the time frame I expected. He left my home in the condition in which found, no mess. He even swept my garage and the mess was all mine!! Very pleasant experience and I will continue to hire Ruben for ongoing service and maintenance. Highly recommend!!!"
Before
After
Response time1 day
1 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for DG Heating & Air Conditioning, Inc.
DG Heating & Air Conditioning, Inc.
4.5(
29
)
Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace

Serving Jefferson, MA and surrounding areas

Approved

In business since 2017

Free estimates

Customers say: Quality work

"Derek was quick to respond to my request for a quote and had our mini split installed within a week. He was friendly, professional, respectful of our property and meticulous. I highly recommend hiring DH Heating and Air Conditioning, you won’t regret it!!"
Response time1 day
1 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Landry Mechanical, Inc.- HVAC
Landry Mechanical, Inc.- HVAC
4.5(
108
)
Central A/C - InstallCentral A/C - Service or Repair

Serving Jefferson, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2008

Emergency services offered

Warranties offered

"Our central air unit died during the hottest days of the year so far. It is a new unit . We called a few places desperate for service and were told it would be a few weeks for most companies to make it out. Called Landrys after finding them on google. A woman called me back less than 20 minutes after first phone call and said they would be out today. Tyler came and was great. Fixed our unit and saved our life! We will be using them in the future for sure. 5 stars for service and their customer service is without a doubt 5 stars as well."
Mitsubishi Ductless
Furnace install
Water filtration
Stretching out during a hvac install
New heat pump and furnace

+50

Response time11 hrs
Response rate97%
23 neighbors recently requested a quote
Avatar for All HVAC
All HVAC
5.0(
17
)
Central A/C - Service or Repair

Serving Jefferson, MA and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"Nick came out that evening he tested all the equipment, electrical and hvac cleaned out the filters and got both ac units ready for this summer! I highly recommend him!"
Response time6 hrs
7 neighbors recently requested a quote
Recommended by87%of homeowners
Avatar for Earth Green Dryer Vent & Duct Cleaning
Earth Green Dryer Vent & Duct Cleaning
4.6(
818
)
Air Ducts & Vents - Clean

Serving Jefferson, MA and surrounding areas

Approved

Super Service Award Winner

In business since 1998

Free estimates

Emergency services offered

"Cleaned all ductwork for heating and air conditioning and left them immaculate. Cleaned dryer vent inside and outside and dry works so much better Truly professional and neat I would highly recommend"
 Before cleaning
 After cleaning
Truck Mount Duct Cleaning
Blower Motor Cleaning
Response time5 hrs
125 neighbors recently requested a quote
Recommended by94%of homeowners
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Air Conditioning FAQs, answered by experts

Ideally, an AC system should never need more Freon (a popular refrigerant) because it circulates in a closed loop. However, refrigerant leaks are not uncommon and may occur gradually over 5 to 15 years. If your system has a leak, it will need to be topped up in a process known as an AC recharge. Signs of a refrigerant leak include weakened AC performance, increased humidity in your home, higher utility bills, and a hissing sound from the unit. The cost of an AC recharge will depend on the size and type of your AC unit, as well as the type of refrigerant it uses.

Mold in your air conditioner isn't a good thing, as it can be harmful to your health. If the mold travels through the ductwork or is blown out of the A/C, you and your family can inhale mold spores and develop respiratory illnesses and other problems. Preventing mold from growing in the air conditioner will help protect your health.

When faced with HVAC issues, it's best to begin by ensuring the thermostat settings are correct for either heating or cooling. If the system isn't responding, check the thermostat for proper function and power supply. It's also important to examine air filters, as clogged ones can decrease performance. Confirm the power supply to the system by checking the circuit breakers and fuses. If these basic steps fail to resolve the issue, contact an HVAC professional for a more detailed diagnosis and repair.

Most HVAC companies recommend against setting your AC below 70 as it could freeze up the system and cause more problems. Regardless of how hot it is outside, there is generally a 20 degree difference between the outside and inside temperatures, so even if it’s 100 degrees outside, your AC will likely not be able to cool your home to 70 degrees.

Setting your AC unit to 78 degrees can, indeed, help you save energy. In fact, according to experts, every degree you turn the unit up could save you between 1% and 3% on your energy bills. That said, turning your unit off entirely while you’re out might actually be less efficient than keeping it on at a higher temperature. Why? The unit will need to work extra hard to cool the house back off again after all those hot hours. 

The Jefferson, MA homeowners’ guide to air conditioning services

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