Top-rated heating and air conditioning pros.

Get matched with top heating and air conditioning pros in Merrimack, NH

Enter your zip and get matched with up to 5 pros

TRUSTED BY MERRIMACK, NH HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon240
    Verified heating and air conditioning services reviews

Find Heating and air conditioning pros in Merrimack

Avatar for Granite State Refrigeration Services LLC

Granite State Refrigeration Services LLC

5.00(
10
)
Approved Pro

Granite State Refrigeration Services LLC

5.00(
10
)
Approved Pro
Customers say: Quick response
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
47 local quotes requested

We are a small family owned and operated business with a goal to provide exceptional service at an affordable price. We offer a wide range of HVAC services, including installation and service of Ductless Mini Splits, Conventional Heat Pump/ Air Handlers, Furnaces, Rooftop Package Units, and Refrigeration Systems both in the residential and commercial settings. We strive to exceed expectations by delivering exceptional service, great quality work, and professionalism on every job. Read more below on all the services we offer and contact us with any questions or to schedule a free estimate today!

"Fantastic service!"

Kevin B on May 2025

We are a small family owned and operated business with a goal to provide exceptional service at an affordable price. We offer a wide range of HVAC services, including installation and service of Ductless Mini Splits, Conventional Heat Pump/ Air Handlers, Furnaces, Rooftop Package Units, and Refrigeration Systems both in the residential and commercial settings. We strive to exceed expectations by delivering exceptional service, great quality work, and professionalism on every job. Read more below on all the services we offer and contact us with any questions or to schedule a free estimate today!

"Fantastic service!"

Kevin B on May 2025


Avatar for Pure Temp Heating and Cooling, LLC

Pure Temp Heating and Cooling, LLC

5.00(
15
)
Approved Pro

Pure Temp Heating and Cooling, LLC

5.00(
15
)
Approved Pro
Super Service Award
Customers say: Quick response
13 local quotes requested
2 years of experience

Pure Temp Heating and Cooling is Veteran Owned company dedicated to providing our customers with the best quality and craftsmanship. With over 12 years of experience in the industry ranging from residential, to commercial and light industrial, we are here to build relationships with our customers and communities and to provide our employees with a great place to work. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations.

"This project is fhw not fha"

Michael J on August 2025

Pure Temp Heating and Cooling is Veteran Owned company dedicated to providing our customers with the best quality and craftsmanship. With over 12 years of experience in the industry ranging from residential, to commercial and light industrial, we are here to build relationships with our customers and communities and to provide our employees with a great place to work. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations.

"This project is fhw not fha"

Michael J on August 2025


Current Solutions Electrical, LLC

5.00(
4
)
Approved Pro

Current Solutions Electrical, LLC

5.00(
4
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2 years of experience

With over 6 years of experience CURRENT SOLUTIONS ELECTRICAL is your trusted choice for all of your electrical needs. We take pride in our work and can assure your satisfaction with your project. Give us a call today for a free estimate!

"Replaced 2 deck lights and 2 bathroom fans."

Barbara T on March 2024

With over 6 years of experience CURRENT SOLUTIONS ELECTRICAL is your trusted choice for all of your electrical needs. We take pride in our work and can assure your satisfaction with your project. Give us a call today for a free estimate!

"Replaced 2 deck lights and 2 bathroom fans."

Barbara T on March 2024


E Star HVAC

New on AngiNew on Angi
Approved Pro

E Star HVAC

New on AngiNew on Angi
Approved Pro
3 years of experience
Free onsite estimate

E Star HVAC LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

E Star HVAC LLC is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.


HOLLIS OIL HEAT SERVICE, LLC

5.00(
1
)
Approved Pro

HOLLIS OIL HEAT SERVICE, LLC

5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
19 years of experience

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

"I had problems with my boiler and no one else was able to solve it and he was able to solve it right away without any issues. He really took his time and was very thorough with the work."

Allison R on November 2021

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

"I had problems with my boiler and no one else was able to solve it and he was able to solve it right away without any issues. He really took his time and was very thorough with the work."

Allison R on November 2021


Prime Time Mechanical, LLC

5.00(
2
)
Approved Pro

Prime Time Mechanical, LLC

5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
16 years of experience

With over 6 years of experience Prime Time Mechanical, LLC is one of New Hampshire's premier HVAC contractors. We specialize in all types of installations and repairs from gas and oil furnaces, boilers, water heaters, and gas piping. Our staff takes pride in providing our customers with the highest quality of work and customer service. Give us a call today!

"null"

Lori S on October 2019

With over 6 years of experience Prime Time Mechanical, LLC is one of New Hampshire's premier HVAC contractors. We specialize in all types of installations and repairs from gas and oil furnaces, boilers, water heaters, and gas piping. Our staff takes pride in providing our customers with the highest quality of work and customer service. Give us a call today!

"null"

Lori S on October 2019


Avatar for Easy A's Plumbing & Heating, LLC

Easy A's Plumbing & Heating, LLC

4.50(
3
)
Approved Pro

Easy A's Plumbing & Heating, LLC

4.50(
3
)
Approved Pro
Customers say: Terrific value
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
19 years of experience

Welcome to Easy A's Plumbing & Heating, LLC. We are excited to exceed your expectations. As experts, we will handle your needs with the high quality expertise that your home or business deserves. We offer competitive prices, and customer satisfaction is our number one priority. Call us now!

"It took much longer than expected, but they were so much more reasonable price wise, it was worth the wait."

Paula S on July 2019

Welcome to Easy A's Plumbing & Heating, LLC. We are excited to exceed your expectations. As experts, we will handle your needs with the high quality expertise that your home or business deserves. We offer competitive prices, and customer satisfaction is our number one priority. Call us now!

"It took much longer than expected, but they were so much more reasonable price wise, it was worth the wait."

Paula S on July 2019


Avatar for Desmarais HVAC

Desmarais HVAC

5.00(
6
)
Approved Pro

Desmarais HVAC

5.00(
6
)
Approved Pro
Customers say: Terrific value
36 years of experience
Free onsite estimate

With over 30 years of experience serving the Auburn area, Desmarais HVAC is more than ready to handle your heating and cooling needs with professionalism and expertise. Give Dale a call today to experience the Desmarais difference! Fully licensed and insured.

"Dale is professional and reliable. After speaking with Dale on the phone about 15 minutes, I knew he was the guy to do my project. He is very knowledgeable, and speaks concisely to his clients. He is a busy fellow due to his high quality work, yet still affords his clients with his service and talent for HVAC bar none. Thank you Dale for installing our new Daikin unit. It works great and has made the air quality in our home ideal!! Diana & Lance"

Diane S on May 2021

With over 30 years of experience serving the Auburn area, Desmarais HVAC is more than ready to handle your heating and cooling needs with professionalism and expertise. Give Dale a call today to experience the Desmarais difference! Fully licensed and insured.

"Dale is professional and reliable. After speaking with Dale on the phone about 15 minutes, I knew he was the guy to do my project. He is very knowledgeable, and speaks concisely to his clients. He is a busy fellow due to his high quality work, yet still affords his clients with his service and talent for HVAC bar none. Thank you Dale for installing our new Daikin unit. It works great and has made the air quality in our home ideal!! Diana & Lance"

Diane S on May 2021


Avatar for Evan Jones- Master Electrician, LLC

Evan Jones- Master Electrician, LLC

4.38(
17
)
Approved Pro

Evan Jones- Master Electrician, LLC

4.38(
17
)
Approved Pro
Customers say: Quick response
21 years of experience
Free onsite estimate

Evan Jones is a locally owned and operated company that values honesty and integrity in all aspects of our business. A expert for the last 15 years of hands on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!

"This company wasted several weeks of our time without providing a sufficient apology or explanation. They initially scheduled service while asking in a voicemail if I wanted to base the estimate on the detailed specs in my email or if I preferred to have the owner walk through. I followed up within 2 business days to confirm the date at the end of July and mentioned either option would be okay with me, but I wanted to confirm whether my specification was sufficient with the owner as I felt there were some non standard parts involved. I patiently waited and followed up from time to time. This is the full timeline: June 30 at 4:18 p.m.: I called. The owner (Evan) picked up and mentioned the company was finishing up for the day and just taking emergency calls then, while adding that his secretary would follow up with me the following week. I mentioned that I sent an email the same day with a full breakdown of the work. July 6, 1:48 p.m.: The secretary left a voicemail to confirm a July 26 appointment with an arrival time of 8:15 a.m. and sent an email to confirm the scheduled date and time. In the voice mail, I was asked to follow up to see if I wanted an in-person estimate or if an estimate based on my email specs was sufficient. July 10, 11:41 a.m. I called to follow up, but received an automated message indicating the number has calling restrictions that prevented completion of my call. I followed up via email (below). July 11, 2:47 p.m.: I sent a text message to a 978 area code number, which seemed to be the number that the main number forwards to, to confirm receipt of my email while mentioning the automated message issue. July 12, 10:22 a.m. I called to follow up as I did not receive a response to the email. I wanted to make sure they knew I confirmed the date and time, and I wanted to discuss the estimate options. I immediately received a text message back from the 978 area code operated by the secretary, adding that she was on another call. I did not receive a call back that day. July 14, 9:23 p.m. I followed up via text message, asking when would be a good moment to catch up regarding the upcoming work. I received a call back from the secretary at 9:30 a.m. I summarized my July 6 email. The secretary indicated she would get back to me that day after discussing the project with Evan. I did not hear back. ** July 18, 9:54 p.m.: followed up again over email for when the team arrived the following day while providing the above breakdown so they understood my frustration from a customer perspective. July 19, 7:55 p.m.: I received an email from the owner indicating he cancelled the appointment while being sorry that our communication has not met your expectations, which I felt was interesting as the lack of communication would be frustrating to any customer, and his response incorrectly suggested that it was just my expectations at issue. Frankly, when a company commits to a job, they should always follow up. I emailed the owner back right after and asked for clarification, but I never received one. I should note that this electrician has worked for me before. I was overall happy with the service, with some caveats. On a job at my new residence, they installed new outlets as some existing outlets installed by someone else prior had safety concerns. During the install, I noticed that some new outlets were not as eye-level as they were before (this was not an issue with the available leeway around the outlet, as there was some). I asked one of his installers nicely if some could be moved a bit to be eye level, and the owner (Evan) overheard this and announced that this was a safety visit and not a cosmetic one. This did not make sense to me."

Curtis C on July 2023

Evan Jones is a locally owned and operated company that values honesty and integrity in all aspects of our business. A expert for the last 15 years of hands on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today!

"This company wasted several weeks of our time without providing a sufficient apology or explanation. They initially scheduled service while asking in a voicemail if I wanted to base the estimate on the detailed specs in my email or if I preferred to have the owner walk through. I followed up within 2 business days to confirm the date at the end of July and mentioned either option would be okay with me, but I wanted to confirm whether my specification was sufficient with the owner as I felt there were some non standard parts involved. I patiently waited and followed up from time to time. This is the full timeline: June 30 at 4:18 p.m.: I called. The owner (Evan) picked up and mentioned the company was finishing up for the day and just taking emergency calls then, while adding that his secretary would follow up with me the following week. I mentioned that I sent an email the same day with a full breakdown of the work. July 6, 1:48 p.m.: The secretary left a voicemail to confirm a July 26 appointment with an arrival time of 8:15 a.m. and sent an email to confirm the scheduled date and time. In the voice mail, I was asked to follow up to see if I wanted an in-person estimate or if an estimate based on my email specs was sufficient. July 10, 11:41 a.m. I called to follow up, but received an automated message indicating the number has calling restrictions that prevented completion of my call. I followed up via email (below). July 11, 2:47 p.m.: I sent a text message to a 978 area code number, which seemed to be the number that the main number forwards to, to confirm receipt of my email while mentioning the automated message issue. July 12, 10:22 a.m. I called to follow up as I did not receive a response to the email. I wanted to make sure they knew I confirmed the date and time, and I wanted to discuss the estimate options. I immediately received a text message back from the 978 area code operated by the secretary, adding that she was on another call. I did not receive a call back that day. July 14, 9:23 p.m. I followed up via text message, asking when would be a good moment to catch up regarding the upcoming work. I received a call back from the secretary at 9:30 a.m. I summarized my July 6 email. The secretary indicated she would get back to me that day after discussing the project with Evan. I did not hear back. ** July 18, 9:54 p.m.: followed up again over email for when the team arrived the following day while providing the above breakdown so they understood my frustration from a customer perspective. July 19, 7:55 p.m.: I received an email from the owner indicating he cancelled the appointment while being sorry that our communication has not met your expectations, which I felt was interesting as the lack of communication would be frustrating to any customer, and his response incorrectly suggested that it was just my expectations at issue. Frankly, when a company commits to a job, they should always follow up. I emailed the owner back right after and asked for clarification, but I never received one. I should note that this electrician has worked for me before. I was overall happy with the service, with some caveats. On a job at my new residence, they installed new outlets as some existing outlets installed by someone else prior had safety concerns. During the install, I noticed that some new outlets were not as eye-level as they were before (this was not an issue with the available leeway around the outlet, as there was some). I asked one of his installers nicely if some could be moved a bit to be eye level, and the owner (Evan) overheard this and announced that this was a safety visit and not a cosmetic one. This did not make sense to me."

Curtis C on July 2023


Chad Woods

4.92(
71
)
Approved Pro

Chad Woods

4.92(
71
)
Approved Pro
Customers say: Quality work
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
23 years of experience

Call Chad Woods for all of your electrical needs. I have over 20+years experience in the electrical trade. I strive for perfection on workmanship & never leave a job until it is 100% completed exactly to customer specifications. Call today and let my expertise make your idea's possible!

"Chad worked with my husband and I on installation of a bathroom fan and we can’t recommend him highly enough! His expertise was highly valued- took the time to discuss pros and cons of the project and answer any and all questions we had. We also greatly appreciated his transparency (e.g. helped us to cut some of the labor costs if we were interested in doing some prep work ourselves) and communication (e.g. very timely and responsive with all texts, calls and scheduled visits). We were couldn’t be happier with the results and process! "

Sarah C on June 2025

Call Chad Woods for all of your electrical needs. I have over 20+years experience in the electrical trade. I strive for perfection on workmanship & never leave a job until it is 100% completed exactly to customer specifications. Call today and let my expertise make your idea's possible!

"Chad worked with my husband and I on installation of a bathroom fan and we can’t recommend him highly enough! His expertise was highly valued- took the time to discuss pros and cons of the project and answer any and all questions we had. We also greatly appreciated his transparency (e.g. helped us to cut some of the labor costs if we were interested in doing some prep work ourselves) and communication (e.g. very timely and responsive with all texts, calls and scheduled visits). We were couldn’t be happier with the results and process! "

Sarah C on June 2025

...
Showing 1-10 of 230
Heating and Air Conditioning questions, answered by experts

Yes, adding central air can increase your home value by as much as 10%. Generally speaking, prospective buyers prefer a central AC system over a ductless system or room-by-room AC units. That’s because central air conditioning blends into the home easier than individual room air conditioners and typically has less equipment to maintain.

Choosing between a ductless mini-split and central AC depends on your specific needs. Ductless mini-splits are ideal for targeted cooling, providing zoned comfort and energy efficiency. They are perfect for smaller spaces or homes lacking ductwork. In contrast, central AC offers consistent cooling throughout the entire house but requires ductwork and may be less energy-efficient for smaller spaces. 

Consider factors like budget, home size, and cooling preferences to make the right choice. Combining both systems, with a ductless mini-split in specific areas, can also be a viable solution for tailored comfort and overall efficiency.

Signs of a damaged evaporator coil include warm air from vents, frequent starts and stops without proper cooling, failure to turn on, refrigerant leaks, and unusual noises. If you suspect issues with your AC system or its components, it’s best to call an AC repair technician for proper diagnosis and repairs.

As mentioned above, not all HVAC Schrader valves are necessarily the same. While the valve core and pin or spring size on Schrader valves used for HVAC are generally similar, the valves are not all universal and interchangeable. The size of Schrader valves varies depending on whether it's used in an air conditioner, bicycle tire, or motor vehicle tire.

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.

The Merrimack, 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.

What do you need done? We’ll find top pros.
  • 🌱 "Mow a small front yard"
  • 🛠 "Fix a leaking pipe under the sink"
  • 🏠 "Repair shingles on an asphalt roof"