Top-rated heating and air conditioning pros.

Best heating and air conditioning pros near Williamstown, MA

Enter your zip and get matched with up to 5 pros

Need a pro for your heating and air conditioning service project in Williamstown, MA?

Select your specific project to find the pro for you.

TRUSTED BY WILLIAMSTOWN, MA HOMEOWNERS

  • Average homeowner rating star icon4.8
    Average homeowner rating
  • Verified reviews icon23
    Verified heating and air conditioning services reviews

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

Avatar for Everclean Air LLC
Everclean Air LLC
4.8(
43
)
Air Ducts & Vents - Clean

Serving Williamstown, 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."
Additional Photos
Additional Photos
Additional Photos
Additional Photos
Additional Photos

+2

Response time7 hrs
Response rate100%
7 neighbors recently requested a quote
Avatar for Hurley Mechanical
Hurley Mechanical
4.8(
17
)
Heat Pump - Install or ReplaceCentral A/C - InstallOil Furnace / Forced Air Heating System - Install+47 more

Serving Williamstown, MA and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

"Cary responded very quickly to my request and came out the next day. He was very thorough and efficient in rooting out the problem and was able to fix our a/c unit within the hour. And gave excellent pointers as well as recommendations for better energy efficient cooling/heating systems for our entire house. Will definitely go back to him in the future."
Heating & A/C Project
Water Heaters Project
Heating and Air Conditioning Project
First Floor Unit
Water Heaters Project

+25

Response time1 day
Response rate100%
13 neighbors recently requested a quote
Avatar for Walshco LLC
Walshco LLC
5.0(
19
)
Oil Boiler or Radiator Heating System - RepairOil Furnace / Forced Air Heating System - Repair

Serving Williamstown, MA and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

"Brady and Casey are an awesome team. They came a long distance when the locals couldn't or wouldn't. They're friendly, extremely knowledgeable and if they were closer, they would be our regular furnace experts!"
roth 275
roth 275
Roth 160 Gallon Tank
Response time9 hrs
Response rate100%
51 neighbors recently requested a quote
Avatar for Pro Services
Pro Services
4.8(
151
)
Air Ducts & Vents - Clean

Serving Williamstown, MA and surrounding areas

Approved

Super Service Award Winner

In business since 2002

Free estimates

Emergency services offered

"We needed chimney sweep & minor repairs. Scheduling was easy and the guys who showed up were on time and very professional. Work was done well and we’re very happy, will be calling them for all future work on our chimney and HVAC."
Chimney Cap Installation
Smoke chamber before
Chimney Sweep Project
Fireplaces Project
Chimney Sweep Project

+36

Response time4 days
Response rate100%
47 neighbors recently requested a quote
Avatar for Walshco LLC
Walshco LLC
5.0(
10
)
Oil Boiler or Radiator Heating System - RepairOil Furnace / Forced Air Heating System - Repair

Serving Williamstown, MA and surrounding areas

Approved

In business since 2024

Free estimates

Credit card accepted

WalshCo is a family-owned heating company specializing in oil-fired heating systems throughout New Hampshire and surrounding communities. \n \nOur services include oil tank installations and replacements, oil boiler and furnace installations, heating system repairs, annual maintenance and tune-ups, diagnostics, emergency no-heat service, water heater installations, and oil tank inspections. \n \nWe take pride in providing honest recommendations, quality workmanship, fair pricing, and dependable service. Whether you need a new oil tank, a complete heating system replacement, or fast repairs to restore your heat and hot water, our licensed technicians are committed to getting the job done right. \n \nAs a family-owned business, we believe in straightforward communication, professional service, and treating every customer?s home with the same care and respect we would our own.

Roth 160 Gallon Oil Tank
Roth 160 Gallon Oil Tank
Roth 160 Gallon Oil Tank
Avatar for Catamount Response
Catamount Response
5.0(
12
)
Air Ducts & Vents - Clean

Serving Williamstown, MA and surrounding areas

Approved

In business since 1987

Free estimates

Emergency services offered

"We have renters staying in a house we list on airbnb. We were hearing mounting complaints from them - the lower level is smelly... it's getting worse... it's damp... the dehumidifier isn't working... someone is allergic and having symptoms. I called for help after business hours and heard back quickly from Dan directly. I sent in the professionals! They evaluated the situation and told us what we hoped (and suspected) - there is no mold/mildew problem! Dan from Catamount offered to leave a powerful dehumidifier there for a week anyway, if we wanted, but although I would have paid him for that, he didn't even recommend it - because it was unnecessary! This is clearly a scrupulous company that will not charge you for work unless you really need it. While I'm glad we don't have a problem, I actually regret that I can't hire him for something. I wish every provider was like this."
3 neighbors recently requested a quote
Recommended by100%of homeowners
Oak and ivory cleaning co
New to Angi
Air Ducts & Vents - Clean

Serving Williamstown, MA and surrounding areas

Approved

Hi! I’m Shelbea, the owner of Oak & Ivory Cleaning Co. 🤍✨\n\nI started my cleaning business with one simple goal: to help make life a little easier by giving my clients a clean, comfortable, and welcoming space to come home to. I take pride in being dependable, detail-oriented, and treating every home as if it were my own.\n\nWhether you need a routine cleaning, deep clean, move-in/move-out service, or just some extra help getting your space back in order, I’d love the opportunity to help! 🧹🫧\n\nThank you for supporting my small business — I can’t wait to make your space shine! 🤍

2 neighbors recently requested a quote
...
Showing 1-10 of 89
Heating and Air Conditioning FAQs, answered by experts

If there’s a freon leak in your home’s AC unit, it will cause the system to work overtime to cool the house. That issue will result in higher energy bills and it will take much longer for cool air to disperse throughout the home. If your system has a freon leak during the summer, it can make hot days miserable. That’s why it’s important to hire an HVAC professional to resolve a freon leak as quickly as possible.

If your home has an existing forced-air heat system, you can add a central air conditioner to it. An HVAC technician can retrofit your forced-air heating system by installing an evaporator coil onto the furnace plenum, the box next to the furnace that draws in air. Once installed, the air conditioning coils use the furnace’s blower to circulate the air.

While your AC unit may still run even if its capacitor is going bad, doing so takes a lot more energy, so it can drive up your electric bill and cause further damage to your AC unit’s parts. If you suspect a bad capacitor, it’s important to have a professional diagnose and fix the problem before you continue to run your AC.

There are a few ways to reduce your electricity bills if you use window AC units to keep cool. Set the unit temperature at least 1 degree higher than it is currently to reduce costs. Keep the unit clean for it to run efficiently. You may want to hire a window AC specialist near you to inspect the unit once a year and keep it in tip-top shape.

If your AC runs constantly, it could be due to a number of things, including a faulty thermostat, incorrect temperature settings, or broken equipment. Alternatively, you might have an airflow problem (for example, blocked vents or leaky ductwork). Either way, an HVAC pro can identify the specific problem and fix it for you.

The Williamstown, 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.