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    Verified heating and air conditioning services reviews

Find Heating and air conditioning pros in Ayer

Avatar for Modern Energy

Modern Energy

5.00(
3
)
Approved Pro

Modern Energy

5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
589 local quotes requested

Modern Energy is a top rated Mass Save contractor that specializes in Whole Home Heat Pump installation for both residential and commercial customers. With deep roots in the energy efficiency world, we always make sure to install the most efficient, cost-effective products on the market. Plus - we have in house staff to help our customers handle the rebate and financing process!

"The guys at Modern Energy did an excellent job, Ryan was VERY responsive and got me the best deal possible. These past two summers showed how beneficial this type of system mini-splits are. Highly recommend!"

Michael T on September 2025

Modern Energy is a top rated Mass Save contractor that specializes in Whole Home Heat Pump installation for both residential and commercial customers. With deep roots in the energy efficiency world, we always make sure to install the most efficient, cost-effective products on the market. Plus - we have in house staff to help our customers handle the rebate and financing process!

"The guys at Modern Energy did an excellent job, Ryan was VERY responsive and got me the best deal possible. These past two summers showed how beneficial this type of system mini-splits are. Highly recommend!"

Michael T on September 2025


Avatar for NETR Inc

NETR Inc

4.79(
76
)
Approved Pro

NETR Inc

4.79(
76
)
Approved Pro
Customers say: Super punctual
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
250 local quotes requested

For emergency services, please call 781-933-6387. N.E.T.R., Inc. is here to help homeowners install the best heating and cooling systems that fits their needs. Since 1989, we’ve installed heating and cooling systems in Boston and its surrounding areas, tackling tough problems that our clients face. Our goal is to ensure our clients have energy efficient, quiet, reliable systems so they can live their lives to the fullest both at home and at work. Our dedication to our customers’ needs is what drives us each and every day. Our approach to temperature control and comfort has helped us become one of the most respected names in heating, cooling, and refrigeration in New England

"Before installing a mini-split, the sales person told me that I'd need to cut down an interior shelf to a specific height. I paid a handyman $400 to do exactly what the sales person instructed. Later on, N.E.T.R. came and did the installation; however, AFTER the installation, a technician told me that they hadn't accounted for the vent opening and closing and that the shelf would need to be further cut down. As you can imagine, this type of service is rather ridiculous. If they knew that the shelf would need further cutting, they should have NOT installed the unit. I have called N.E.T.R. six (6) times in three weeks, and no one has called me back about this issue. After paying for the unit and for a handyman, it's ridiculous that I have AC that is compromised because no one with the company thought to properly measure the space so that the work by the handyman could be done once. At this point, I'd like for N.E.T.R. to take care of this for me."

Linda O on June 2025

For emergency services, please call 781-933-6387. N.E.T.R., Inc. is here to help homeowners install the best heating and cooling systems that fits their needs. Since 1989, we’ve installed heating and cooling systems in Boston and its surrounding areas, tackling tough problems that our clients face. Our goal is to ensure our clients have energy efficient, quiet, reliable systems so they can live their lives to the fullest both at home and at work. Our dedication to our customers’ needs is what drives us each and every day. Our approach to temperature control and comfort has helped us become one of the most respected names in heating, cooling, and refrigeration in New England

"Before installing a mini-split, the sales person told me that I'd need to cut down an interior shelf to a specific height. I paid a handyman $400 to do exactly what the sales person instructed. Later on, N.E.T.R. came and did the installation; however, AFTER the installation, a technician told me that they hadn't accounted for the vent opening and closing and that the shelf would need to be further cut down. As you can imagine, this type of service is rather ridiculous. If they knew that the shelf would need further cutting, they should have NOT installed the unit. I have called N.E.T.R. six (6) times in three weeks, and no one has called me back about this issue. After paying for the unit and for a handyman, it's ridiculous that I have AC that is compromised because no one with the company thought to properly measure the space so that the work by the handyman could be done once. At this point, I'd like for N.E.T.R. to take care of this for me."

Linda O on June 2025


Avatar for Sila Heating, Cooling, Plumbing and Electrical

Sila Heating, Cooling, Plumbing and Electrical

4.54(
5,210
)
Approved Pro

Sila Heating, Cooling, Plumbing and Electrical

4.54(
5,210
)
Approved Pro
Customers say: Super punctual
655 local quotes requested
36 years of experience

Live Your Most Comfortable Life with a Company You Trust. We offer Same Day Service and Next Day Installation! Sila has been the center of delighting homeowners since 1989, with our team of engineers, certified technicians, and system designers that are proud to deliver the highest level of expertise in the HVAC industry. Whether it’s a repair, replacement, installation, or service, we have an unwavering commitment to keeping you and your family comfortable and safe — season after season. We guarantee satisfaction and are proud to have earned over 7,000 “A” ratings on Angie’s List and its prestigious Super Service Award!

"Charged $2,000 (that's right, $2,000!) to install a new sprayer faucet and soap dispenser in Boston. $1,500 went to labor, which took less than 2 hours. I'm sorry, but $750/hr is outrageous. I did pay it because I wanted to expedite solving the problem for the tenants, but I now regret as their dishwasher is not working and I suspect the plumber failed to reconnect everything probably."

Joel R on August 2025

Live Your Most Comfortable Life with a Company You Trust. We offer Same Day Service and Next Day Installation! Sila has been the center of delighting homeowners since 1989, with our team of engineers, certified technicians, and system designers that are proud to deliver the highest level of expertise in the HVAC industry. Whether it’s a repair, replacement, installation, or service, we have an unwavering commitment to keeping you and your family comfortable and safe — season after season. We guarantee satisfaction and are proud to have earned over 7,000 “A” ratings on Angie’s List and its prestigious Super Service Award!

"Charged $2,000 (that's right, $2,000!) to install a new sprayer faucet and soap dispenser in Boston. $1,500 went to labor, which took less than 2 hours. I'm sorry, but $750/hr is outrageous. I did pay it because I wanted to expedite solving the problem for the tenants, but I now regret as their dishwasher is not working and I suspect the plumber failed to reconnect everything probably."

Joel R on August 2025


Avatar for ACCUTEMP ENGINEERING INC

ACCUTEMP ENGINEERING INC

4.88(
17
)
Approved Pro

ACCUTEMP ENGINEERING INC

4.88(
17
)
Approved Pro
Customers say: Quick response
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
21 local quotes requested

Accutemp Engineering is a Heating, Venting and Air Conditioning Company with 40 Years serving the greater Boston area. We provide Reliable, Efficient, Friendly Service with an Outstanding Maintenance Program designed to save you money. Bob Webster has owned this company from the start and has hired Top Technicians and Staff to provide second to none Service and Installations for our customers. We set a high bar for our technicians, providing many hours of training and evaluation every month. We provide 24 Hr service 365 days a year. Accutemp Engineering is where Comfort counts all year around.

"Excellent for maintenance service and emergency work. I subscribed to their maintenance service for several years before they raised the rate, and they always did fine work. When I switched to another maintenance company that missed a flaw in my furnace which caused it to fail on season startup, AccuTemp came out to diagnose the problem the same day with no contract, got the large expensive replacement part for free under warranty, and had it fully installed and working again within 2 calendar days. All that for just the cost of a day's labor!"

William H on October 2024

Accutemp Engineering is a Heating, Venting and Air Conditioning Company with 40 Years serving the greater Boston area. We provide Reliable, Efficient, Friendly Service with an Outstanding Maintenance Program designed to save you money. Bob Webster has owned this company from the start and has hired Top Technicians and Staff to provide second to none Service and Installations for our customers. We set a high bar for our technicians, providing many hours of training and evaluation every month. We provide 24 Hr service 365 days a year. Accutemp Engineering is where Comfort counts all year around.

"Excellent for maintenance service and emergency work. I subscribed to their maintenance service for several years before they raised the rate, and they always did fine work. When I switched to another maintenance company that missed a flaw in my furnace which caused it to fail on season startup, AccuTemp came out to diagnose the problem the same day with no contract, got the large expensive replacement part for free under warranty, and had it fully installed and working again within 2 calendar days. All that for just the cost of a day's labor!"

William H on October 2024


Arctic Heating and Cooling

New on AngiNew on Angi
Approved Pro

Arctic Heating and Cooling

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

At Arctic Heating and Cooling, our company is based on the belief that our customers' needs are of the utmost importance. Our team is committed to meeting those needs. We welcome the opportunity to earn your trust and deliver you the best service. No job is too big or too small for our experienced team. Call today for a quote.

At Arctic Heating and Cooling, our company is based on the belief that our customers' needs are of the utmost importance. Our team is committed to meeting those needs. We welcome the opportunity to earn your trust and deliver you the best service. No job is too big or too small for our experienced team. Call today for a quote.


Avatar for Elemental Heating & Cooling

Elemental Heating & Cooling

5.00(
11
)
Approved Pro

Elemental Heating & Cooling

5.00(
11
)
Approved Pro
Customers say: Terrific value
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
5 years of experience

At Elemental Heating & Cooling, we're excited to earn your business! Locally owned and operated, we are known in the area for our prompt service and attention to detail. Customer satisfaction is always our primary concern, so be sure to give us a call today!

"These guys were great. AC stopped working last night, all I could think was there goes a thousand dollars. They got back to me super fast and had my AC working in no time., for much less than I was afraid of."

Yuri S on May 2024

At Elemental Heating & Cooling, we're excited to earn your business! Locally owned and operated, we are known in the area for our prompt service and attention to detail. Customer satisfaction is always our primary concern, so be sure to give us a call today!

"These guys were great. AC stopped working last night, all I could think was there goes a thousand dollars. They got back to me super fast and had my AC working in no time., for much less than I was afraid of."

Yuri S on May 2024


Avatar for D Day Plumbing

D Day Plumbing

4.96(
38
)
Approved Pro

D Day Plumbing

4.96(
38
)
Approved Pro
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
13 years of experience

- Closely follow the average True Cost Rate furnished on the Homeowners section of Home Advisor for labor costs - Show up on time and give up front estimates - Focus on service work and limited multi-day projects so my schedule remains fluid - Advocate on the customer's behalf shopping for best prices on quality materials and best practices to get jobs done to code at the best rate possible

"We had an issue with a Dry Well periodically backing up. Damian and the D Day Plumbing team were very professional and knowledgeable and provided an estimate with a couple different options and their related costs. They installed a new utility sink, sink pump, and needed piping and valves with tie ins to the main septic. They made improvement above and beyond the initial job breakdown, all the while staying within budget. I will certainly consider them again for any future work. Thank you Damian and the D Day Plumbing Team for a job very done!"

Jim K on July 2024

- Closely follow the average True Cost Rate furnished on the Homeowners section of Home Advisor for labor costs - Show up on time and give up front estimates - Focus on service work and limited multi-day projects so my schedule remains fluid - Advocate on the customer's behalf shopping for best prices on quality materials and best practices to get jobs done to code at the best rate possible

"We had an issue with a Dry Well periodically backing up. Damian and the D Day Plumbing team were very professional and knowledgeable and provided an estimate with a couple different options and their related costs. They installed a new utility sink, sink pump, and needed piping and valves with tie ins to the main septic. They made improvement above and beyond the initial job breakdown, all the while staying within budget. I will certainly consider them again for any future work. Thank you Damian and the D Day Plumbing Team for a job very done!"

Jim K on July 2024


Avatar for Gotme Under Pressure ?, LLC

Gotme Under Pressure ?, LLC

4.49(
580
)
Approved Pro

Gotme Under Pressure ?, LLC

4.49(
580
)
Approved Pro
Customers say: Quick response
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
38 years of experience

Gotme under pressure? LLC IS A Plumbing, Heating & Gasfitting, Drain Cleaning professional in your area. We will meet all of your plumbing needs. We take the pressure off all your plumbing issues. As our company is built off of honesty, integrity and leadership, this is what you can expect.

"Great work with the inspection. Will go back for future plumbing work"

Antonio S on September 2022

Gotme under pressure? LLC IS A Plumbing, Heating & Gasfitting, Drain Cleaning professional in your area. We will meet all of your plumbing needs. We take the pressure off all your plumbing issues. As our company is built off of honesty, integrity and leadership, this is what you can expect.

"Great work with the inspection. Will go back for future plumbing work"

Antonio S on September 2022


Avatar for Addario, Inc.

Addario, Inc.

3.99(
233
)
Approved Pro

Addario, Inc.

3.99(
233
)
Approved Pro
Customers say: True professional
1506 local quotes requested
27 years of experience

Over 70,000 Massachusetts homeowners trust Addario's for peace of mind. For nearly 30 years, we've kept homes comfortable with heat that stays on, clean water, and reliable systems. We've served 50,000+ families with true craftsmanship and integrity. A+ BBB rated with the region's strongest warranty, we're the company your neighbors recommend. As one of the state's fastest-growing companies, we're licensed, insured, and fully equipped for plumbing, heating, cooling, electrical, drain cleaning, sewer replacement, generators, bathroom remodels, and more. Our 50+ expert team doesn't just fix problems—we prevent them. Every service includes a personalized Homeowner's Maintenance Checklist to protect your investment. When your heating or cooling isn't working right, we don't guess. We fix it fast, completely, and correctly the first time. You just call Addario's—and consider it handled.

"Outstanding and highly recommended!"

Shawn R on November 2025

Over 70,000 Massachusetts homeowners trust Addario's for peace of mind. For nearly 30 years, we've kept homes comfortable with heat that stays on, clean water, and reliable systems. We've served 50,000+ families with true craftsmanship and integrity. A+ BBB rated with the region's strongest warranty, we're the company your neighbors recommend. As one of the state's fastest-growing companies, we're licensed, insured, and fully equipped for plumbing, heating, cooling, electrical, drain cleaning, sewer replacement, generators, bathroom remodels, and more. Our 50+ expert team doesn't just fix problems—we prevent them. Every service includes a personalized Homeowner's Maintenance Checklist to protect your investment. When your heating or cooling isn't working right, we don't guess. We fix it fast, completely, and correctly the first time. You just call Addario's—and consider it handled.

"Outstanding and highly recommended!"

Shawn R on November 2025


Avatar for Milltown Plumbing, Heating, Cooling and Electrical - HVAC

Milltown Plumbing, Heating, Cooling and Electrical - HVAC

4.49(
311
)
Approved Pro

Milltown Plumbing, Heating, Cooling and Electrical - HVAC

4.49(
311
)
Approved Pro
Customers say: Quick response
59 local quotes requested
46 years of experience

Since 1979, we've provided the highest quality protection against plumbing, heating, cooling, electrical and drain problems for residential and commercial and properties in the Merrimack Valley. At MillTown Plumbing, Heating, Cooling and Electrical, we're a family owned and operated business. We know the value of fast service, from a professional and reliable team. Give us a call today at (617) 725-2674! We look forward to serving you. Our Commitment to You Our fully licensed and bonded technicians are committed to answering your questions directly and honestly and solving your plumbing problems to your satisfaction. We'll even suggest the most cost effective solutions. Our plumbers are courteous, friendly and will always leave your home clean and work-sites tidy.

"Young man who came to do the job told us that they sent him to 3 wrong houses before they found ours. He proceeded to unclog the drain in the basement using the mechanical drain. Took him maybe an hour to clear it and also ran our sinks and toilets to make sure we wouldn?t have another problem. The young man left our house, however proceeded to sit in his running van, parked in my parking spot. I had no issues with this service until I saw the bill. $1000 to snake a drain for an hour? When we inquired about the bill they told us that their rate is 300$ an hour and that the job took 3 hours. In my opinion, if it takes you 3 hours to snake a drain, then someone should be fired or retrained at their job. My assumption is that their scheme involved sending this young man to multiple wrong houses and him sitting in my driveway for a prolong period of time, so that they could charge us for 3 hours of ?work.? "

M L on February 2025

Since 1979, we've provided the highest quality protection against plumbing, heating, cooling, electrical and drain problems for residential and commercial and properties in the Merrimack Valley. At MillTown Plumbing, Heating, Cooling and Electrical, we're a family owned and operated business. We know the value of fast service, from a professional and reliable team. Give us a call today at (617) 725-2674! We look forward to serving you. Our Commitment to You Our fully licensed and bonded technicians are committed to answering your questions directly and honestly and solving your plumbing problems to your satisfaction. We'll even suggest the most cost effective solutions. Our plumbers are courteous, friendly and will always leave your home clean and work-sites tidy.

"Young man who came to do the job told us that they sent him to 3 wrong houses before they found ours. He proceeded to unclog the drain in the basement using the mechanical drain. Took him maybe an hour to clear it and also ran our sinks and toilets to make sure we wouldn?t have another problem. The young man left our house, however proceeded to sit in his running van, parked in my parking spot. I had no issues with this service until I saw the bill. $1000 to snake a drain for an hour? When we inquired about the bill they told us that their rate is 300$ an hour and that the job took 3 hours. In my opinion, if it takes you 3 hours to snake a drain, then someone should be fired or retrained at their job. My assumption is that their scheme involved sending this young man to multiple wrong houses and him sitting in my driveway for a prolong period of time, so that they could charge us for 3 hours of ?work.? "

M L on February 2025

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Heating and Air Conditioning questions, answered by experts

If your AC condenser is nearing the end of its life, it might leak fluid or make loud or unusual sounds (like grinding or hissing). You might also notice that it isn’t heating your home as evenly or effectively as it once did. Also, an aging condenser will have to work harder to cool your home, which may force it to use more power and drive up your utility bills.

NATE (North American Technician Excellence) certification is not legally required for HVAC technicians in most areas, but hiring a professional with this certification is highly recommended. NATE-certified technicians demonstrated their expertise and proficiency in different types of HVAC systems, offering assurance of quality service. It's a voluntary certification, yet it indicates a commitment to professionalism and ongoing training. Choosing a NATE-certified technician often means you're working with someone who is up-to-date on industry standards and best practices, which can lead to better service, energy efficiency, and long-term cost savings.

The DOE is phasing out AC units with SEER ratings that fall below 14 or 15. The exact minimum rating depends on your region. In the northern United States, new ACs must have a minimum SEER rating of 14, though you can still buy and install older systems as long as they were compliant when they were manufactured. In the southern and southwestern United States, you cannot buy or install older air conditioners with lower SEER ratings. The minimum rating is between 14.5 and 15, depending on the power of the unit.

Air filters with a high MERV rating, 11 or above, shouldn't cause airflow problems in most residential systems. However, the airflow can be restricted in some HVAC systems if they aren't designed for high MERV ratings. If in doubt, a local duct installer should inspect your ductwork so that you know what your system can handle.

An undersized whole-house generator has the potential to overheat and shut down when you try to run a central AC system. This scenario can not only damage the whole-house generator, but can also trip your home’s breakers or cause electrical damage. To avoid this situation, hire a local generator installer to correctly size your whole-house generator.

The Ayer, 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.