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TRUSTED BY GRANTHAM, NH HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon22
    Verified heating and air conditioning services reviews

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

*The Angi rating for Heating And Air Conditioning Service companies in Grantham, 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 Grantham, 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 February 16, 2026

Find Heating and air conditioning pros in Grantham

Avatar for Action Plumbing Heating And Air
Action Plumbing Heating And Air
4.9(
92
)

Serving Grantham, NH and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

"Mike the technician was a pleasure to work with. It took two visits to fix our problem with the AC, but we are very happy customers."
Response time1 day
Response rate87%
18 neighbors recently requested a quote
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Avatar for Walshco LLC
Walshco LLC
5.0(
15
)

Serving Grantham, NH and surrounding areas

Approved

In business since 2024

Free estimates

Emergency services offered

"I had a zone issue with my forced radiant heat system. They were able to quickly diagnose the issue, and came up with a cost effective solution. I highly recommend them to anyone having furnace issues this winter, and they're super friendly!"
roth 275
roth 275
Roth 160 Gallon Tank
Response time9 hrs
Response rate96%
4 neighbors recently requested a quote
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Avatar for Hometown Heating & Air
Hometown Heating & Air
5.0(
3
)

Serving Grantham, NH and surrounding areas

Approved

In business since 2022

Free estimates

Emergency services offered

"Very responsive communicators, helpful with advice, seemed to have my best interests in mind. Installers were very courteous, friendly, efficient, and cleaned up beautifully - explained equipment and coordinated well with other contractors involved. Definitely recommend."
12,000 BTU floor mounted console
cassette style Mini split
Indoor 9,000 BTU high wall head.
36,000 BTU outdoor condenser
Additional Photos

+25

Response time1 day
17 neighbors recently requested a quote
Recommended by50%of homeowners
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Avatar for Total Climate Control
Total Climate Control
3.4(
194
)

Serving Grantham, NH and surrounding areas

Approved

In business since 2008

Free estimates

Warranties offered

"It was awesome. They did the b they did, you know, I mean They did within a week, so within six days they had all they they were here, so that came the 1st day. He gave me a quote right away within 3 h hours so I called all three I called all three of the places you recommended, and this one was the best."
Central AC
New Gas boiler
All new hydronics
All new hydronics
51 neighbors recently requested a quote
Recommended by86%of homeowners
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Avatar for Hatch Family Electric LLC
Hatch Family Electric LLC
5.0(
6
)

Serving Grantham, NH and surrounding areas

Approved

Free estimates

Offers commercial services

"Gabe showed up when he said he would, completed the project in a timely, efficient and professional manner and was truly a pleasure to work with. I would highly recommend Gabe for any electrical work you need done!"
13 neighbors recently requested a quote
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Gotme Under Pressure ?, LLC
4.3(
645
)

Serving Grantham, NH and surrounding areas

Approved

In business since 1987

Free estimates

Emergency services offered

"Exchanged messages with Mike to describe work needed, replace an outdoor faucet and shutoff value (previous faucet was leaking). He gave an estimate, reviewed work to be done. Replaced outdoor spigot with a frost-proof spigot, put on new value. Quick test and validation. Professional, efficient and happy with work done! Thank you Mike !"
1 neighbors recently requested a quote
Recommended by88%of homeowners
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Avatar for PuriferaLLC
PuriferaLLC
5.0(
1
)

Serving Grantham, NH and surrounding areas

Approved

Free estimates

Emergency services offered

Small jobs welcome

"I had a great experience with Purifera Cleaning. They showed up on time, were easy to work with, and did an amazing job. My carpets came out looking so much better than I expected, and they took the time to make sure everything was done right. The whole process was smooth from start to finish. I?ll definitely be using them again and would recommend them to anyone looking for a reliable carpet cleaning company."
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Avatar for Minuteman Heating Cooling Refrigeration, LLC
Minuteman Heating Cooling Refrigeration, LLC
4.9(
55
)

Serving Grantham, NH and surrounding areas

In business since 2021

Free estimates

Emergency services offered

"Jeff did an excellent job. I could not be happier. He determined the issue and installed new parts and my A/C was up and running during this summer heat wave. He took the time to explain what was going on with the unit and what needed to be fixed. Very friendly and honest. Highly recommended."
Response time4 hrs
Response rate93%
Recommended by92%of homeowners
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Heating and Air Conditioning questions, answered by experts

A common HVAC rule is that for every 500 to 600 square feet of living space, you need 1 ton of heating or cooling capacity. Now that you know this common rule, you also need to know that it isn’t very accurate, and a dedicated pro wouldn’t use it for your home. If you talk to a pro who won’t or can’t perform a proper Manual J calculation, consider hiring someone more thorough.

To extend your HVAC system’s lifespan, it’s crucial to keep up with maintenance. This includes changing filters and thermostat batteries, keeping the outside unit clean and clear of clutter, and lubricating moving parts. Watch out for leaks, mold buildup, and blockages to ensure your unit stays in good working order. Spotting these issues early can be the difference between a simple, wallet-friendly repair and an expensive replacement.

Not if you have a standard unit. Because portable AC units actually work to dehumidify the room, you’ll likely need to drain the unit from time to time—but you won’t have to put water into it. There is, however, another type of air conditioner called a swamp cooler that requires water to operate. If you have a swamp cooler, you may need to fill a reservoir with water and potentially ice. But a swamp cooler is different from a standard portable AC unit.

Your heating and cooling systems cost you the most on your electric bill and make up 50% of your bill on average. Your washing machine, dryer, oven, and stove contribute significantly to your electric bill as well. Lights, fans, and smaller electronics add up, but aren’t the biggest energy consumers. You can reduce your power usage by setting optimal temperatures on your thermostat and investing in energy-efficient appliances.

It is normal for the attic to be hotter than the rest of the house in the summer, but only by about 10 or 20 degrees. Attics that aren’t properly insulated or ventilated can reach temperatures of 130 degrees or more which can cause damage to the home’s structure, including the roof, wood framing, and HVAC system.

The Grantham, 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.

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