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TRUSTED BY PRINCETON, MA HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon154
    Verified heating and air conditioning services reviews

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

Avatar for Emerald HVAC LLC
Emerald HVAC LLC
4.9(
16
)
Central A/C - Service or RepairHeat Pump - Repair or ServiceHeat Pump - Repair or Service - For Business

Serving Princeton, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2024

Free estimates

Small jobs welcome

"Customer service was good, stayed in contact with me and updated me on arrival time of technician. Technician was courteous, professional, and gave good insight on how to maintain system, helped troubleshoot some things. Looking forward to working with Emerald HVAC again."
Response time1 day
Response rate93%
31 neighbors recently requested a quote
Avatar for Dr. Clean-Air Restoration
Dr. Clean-Air Restoration
4.9(
99
)
Air Ducts & Vents - Clean

Serving Princeton, MA and surrounding areas

Approved

In business since 2014

Free estimates

Emergency services offered

"Prompt response from initial quote request to showing up to do the work. Work was explained prior to start and any questions that I asked during the cleaning were professionally answered."
Before
After
Response time1 day
1 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for Everclean Air LLC
Everclean Air LLC
4.8(
43
)
Air Ducts & Vents - Clean

Serving Princeton, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2023

Free estimates

Emergency services offered

"Great !! Gabriel was on time and went right to work. He took pictures of duct work before and after. He supplied my wife and I N95 masks to wear during the cleaning keeping us safe. Gabriel was a true professional."
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+2

Response time7 hrs
Response rate100%
7 neighbors recently requested a quote
Avatar for Duct Kings
Duct Kings
4.7(
410
)
Air Ducts & Vents - Clean

Serving Princeton, MA and surrounding areas

Approved

Super Service Award Winner

In business since 1999

Free estimates

Emergency services offered

"Duct Kings came to clean out a dryer vent. They were very quick with their work and did a great job. They even documented the job with before and after pictures and videos which we appreciated. I would highly recommend if you're looking for a fast and reliable duct company"
Additional Photos
Response time2 days
Response rate100%
16 neighbors recently requested a quote
KERO HVAC
4.6(
32
)
Central A/C - Service or RepairDuctless Mini-split Heating System - Install or ReplaceHeat Pump - Repair or Service

Serving Princeton, 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 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 Princeton, 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

This is a bit of a trick question. Even though the seasons arrive at the same time every year, the weather doesn’t always behave according to the calendar. So, while it’s fair to say that you can expect to turn on your AC starting in late May or early June, it all depends on the outside temperature and how cool you like to keep your home.

Yes, you can clean your air conditioner filter as a temporary fix for cleaning up dirt, but you’ll eventually need to replace it once the dust starts to accumulate. Use a vacuum with a hose attachment to clean your air filter at least once per year or more often if you have pets.

While it is possible to add Freon to your AC unit yourself, it is not recommended. In fact, the U.S. Environmental Protection Agency (EPA) prohibits the handling of Freon without a license. Freon is a dangerous gas that can cause irreversible damage to your AC or yourself if not installed correctly. It is worthwhile to hire a professional to add Freon to your AC.

At a minimum, an HVAC system should be serviced once per year. However, a twice-a-year service schedule—once in the spring for the cooling system and once in the fall for the heating system—is often recommended, especially for older systems, heat pumps, or in climates with extreme temperatures. Regular service, which includes inspection, cleaning, and maintenance, ensures the system runs efficiently, helps prevent costly breakdowns during peak seasons, and can extend the unit's lifespan. You can also schedule a service if you notice issues like poor performance or strange noises.

The time it takes for an air conditioner to dry fully after cleaning depends on the unit's size and humidity levels. Most units will dry within two to four hours after cleaning, but check the manufacturer's recommendations for drying times. Make sure to leave the unit off until it's completely dry.

The Princeton, 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.