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TRUSTED BY SULLIVAN, NH HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon42
    Verified heating and air conditioning services reviews

Verified Reviews for Heating And Air Conditioning Service pros in Sullivan, NH

*The Angi rating for Heating And Air Conditioning Service companies in Sullivan, NH is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.

*The HomeAdvisor rating for Heating And Air Conditioning Service companies in Sullivan, NH is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Heating And Air Conditioning Service needs.

Last update on July 15, 2026

Find Heating and air conditioning pros in Sullivan

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

Serving Sullivan, NH 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
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Avatar for Walshco LLC
Walshco LLC
5.0(
15
)
Oil Boiler or Radiator Heating System - InstallOil Boiler or Radiator Heating System - Install - For BusinessOil Furnace / Forced Air Heating System - Install

Serving Sullivan, NH 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%
21 neighbors recently requested a quote
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Avatar for McGinley & Sons
McGinley & Sons
4.0(
23
)
Central A/C - InstallDuctless Mini-split A/C - Install or ReplaceHeat Pump - Install or Replace+45 more

Serving Sullivan, NH and surrounding areas

Approved

In business since 2005

Free estimates

Emergency services offered

"Good job at a good price"
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+5

64 neighbors recently requested a quote
Recommended by59%of homeowners
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Avatar for Chimney Experts
Chimney Experts
4.9(
141
)
Air Ducts & Vents - Clean

Serving Sullivan, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2002

Emergency services offered

Warranties 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%
25 neighbors recently requested a quote
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Avatar for County Line Plumbing and Heating
County Line Plumbing and Heating
5.0(
11
)
Gas Boiler or Radiator Heating System - InstallGas Boiler or Radiator Heating System - Install - For BusinessOil Boiler or Radiator Heating System - Install+1 more

Serving Sullivan, NH and surrounding areas

Approved

In business since 2019

Free estimates

Credit card accepted

"I highly recommend Justin from County Line Plumbing and Heating. He recently replaced a hot water heater at a rental property I manage and did a fantastic job from start to finish. He’s prompt, reliable, and always responsive—especially during emergencies. His customer service is excellent, communication is clear, and the work is done right the first time. A true professional and someone I trust with my properties and my own home."
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Recommended by18%of homeowners
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Avatar for AS Plumbing & Heating LLC
AS Plumbing & Heating LLC
5.0(
5
)
Electric Boiler or Radiator Heating System - Install

Serving Sullivan, NH and surrounding areas

Approved

Free estimates

Credit card accepted

Offers commercial services

"The new walk-in shower looks and works great! I would definitely recommend AS Plumbing and Heating!"
3 neighbors recently requested a quote
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Avatar for A2K Electric, LLC
A2K Electric, LLC
5.0(
5
)
Electrical Baseboard or Wall Heater - InstallThermostat - Install or Replace

Serving Sullivan, NH and surrounding areas

Approved

In business since 2022

Free estimates

Small jobs welcome

"Andy came right out and was very professional, answered all our questions and did an outstanding job. We highly recommend A2K Electrical."
New Panel Install
Recommended by100%of homeowners
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Showing 1-10 of 93
Heating and Air Conditioning questions, answered by experts

AC leaks are common, and an HVAC pro can usually fix them. You may be able to resolve some leaks on your own, but a professional HVAC technician should handle most AC leak repair. If left ignored, an AC leak could cause serious damage to your system or leave you with expensive water damage, usually leading to more costly repairs or replacements.

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.

It depends on the size of the space you’re cooling down. If you’re looking for the most affordable way to cool an entire house over a long period of time, then central air will be more cost-effective. But when it comes to cooling down a couple of rooms or one floor, a window unit may be the cheaper option, with both a lower cost to install and less energy used to run.

Yes, AC coil cleaning is definitely worth it. Cleaning your AC coils ensures your AC unit will function efficiently for the long term. Dirty and grimy AC coils make your unit work harder to cool your home, resulting in higher electric bills. Additionally, having your coils professionally cleaned regularly will reduce the possibility of extensive maintenance and repair costs.

To make the most out of your AC, consider implementing the following best practices: 

  • Choose the right size AC for your home to ensure your unit runs as efficiently as possible.

  • Choose a window with shade, as direct sunlight can cause your AC unit to overheat. 

  • Clean or replace the filter at least every two months. 

  • Inspect the AC’s fan and straighten it if necessary. 

  • Discontinue use immediately if you suspect a malfunction, as running the AC while broken can lead to significant issues. 

  • Turn off (or adjust the temperature) when you leave the house.

The Sullivan, NH 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.

See all articles