Top-rated heating and air conditioning pros.

Get matched with top heating and air conditioning pros in South Lancaster, MA

There are 21 highly-rated local heating and air conditioning pros.

TRUSTED BY SOUTH LANCASTER, MA HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon167
    Verified heating and air conditioning services reviews

Find Heating and air conditioning pros in South Lancaster

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
242 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 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


"Top notch vikki had her guys here asap to check my old a/c unit out when the tech said it was gone that Monday the appraiser came out 2 days after that had quote and a week after that install in 1 day . Guys where awesome new what they where doing had it done in no time... highly recommend for any a/c our heating issues awesome people..thank you advance especially vikki she was awesome. "

Leo B on July 2025

Advanced Energy Concepts was established in your community in 1990. Our main focus is energy conservation. Advanced Energy concepts also does a variety of plumbing services for your residential home

"Top notch vikki had her guys here asap to check my old a/c unit out when the tech said it was gone that Monday the appraiser came out 2 days after that had quote and a week after that install in 1 day . Guys where awesome new what they where doing had it done in no time... highly recommend for any a/c our heating issues awesome people..thank you advance especially vikki she was awesome. "

Leo B on July 2025


Avatar for Modern Energy

Modern Energy

5.00(
4
)
Approved Pro

Modern Energy

5.00(
4
)
Approved Pro
Customers say: Quick response
610 local quotes requested
8 years of experience

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 Endless Energy

Endless Energy

4.86(
14
)
Approved Pro

Endless Energy

4.86(
14
)
Approved Pro
Customers say: Quality work
316 local quotes requested
45 years of experience

Endless Energy is the #1 trusted local HVAC and Plumbing Company servicing the majority of the state of Massachusetts. Specializing in Furnaces, Boilers, and Heat Pumps we have Master Plumbers, Electricians, and HVAC Technicians all under one roof reducing your need to find multiple contractors! We are also a Mass Save partner and can conduct your no cost Mass Save Home Energy Assessment and install any recommended insulation. We can help you with: *Heating Repairs, Installation, & Service *AC Repairs, Installation, & Service *Plumbing Repairs, Installation & Service *Water Heater Replacement & Service *Indoor Air Quality Solutions *Ductwork & Line Set Solutions *Electrical Panel Upgrades and Replacement *Insulation *No Cost Home Energy Assessments A Mass Save certified contractor with an A+BBB rating. All of our skilled technicians undergo an extensive background and drug screening prior to being hired to our team!

"Seamless. From the moment of making the appointment with the sales rep to come out to the follow-up phone call, I could not have asked for this installation to go better at a difficult time. They listened to my concerns regarding the look on the outside of the house and the location of units inside. They assisted with all aspects of the Mass Save program making the application process easy. They took care of actual submission of the paperwork where most companies wanted to provide the info to me to then submit."

Jonathan S on July 2020

Endless Energy is the #1 trusted local HVAC and Plumbing Company servicing the majority of the state of Massachusetts. Specializing in Furnaces, Boilers, and Heat Pumps we have Master Plumbers, Electricians, and HVAC Technicians all under one roof reducing your need to find multiple contractors! We are also a Mass Save partner and can conduct your no cost Mass Save Home Energy Assessment and install any recommended insulation. We can help you with: *Heating Repairs, Installation, & Service *AC Repairs, Installation, & Service *Plumbing Repairs, Installation & Service *Water Heater Replacement & Service *Indoor Air Quality Solutions *Ductwork & Line Set Solutions *Electrical Panel Upgrades and Replacement *Insulation *No Cost Home Energy Assessments A Mass Save certified contractor with an A+BBB rating. All of our skilled technicians undergo an extensive background and drug screening prior to being hired to our team!

"Seamless. From the moment of making the appointment with the sales rep to come out to the follow-up phone call, I could not have asked for this installation to go better at a difficult time. They listened to my concerns regarding the look on the outside of the house and the location of units inside. They assisted with all aspects of the Mass Save program making the application process easy. They took care of actual submission of the paperwork where most companies wanted to provide the info to me to then submit."

Jonathan S on July 2020


Avatar for Emerald HVAC LLC

Emerald HVAC LLC

5.00(
13
)
Approved Pro

Emerald HVAC LLC

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

Here at Emerald HVAC LLC, we pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all of our projects no matter how big or small. We are experts in our trade and will always keep you educated on your particular task or project. We look forward to earning your business!

"Talked to George and Jose and everything was great. On time, and minimal fuss! Only took about half a day to complete, so this was perfect. They bought the pump with no involvement from us, and works so much better than the old one. "

Hilja V on August 2025

Here at Emerald HVAC LLC, we pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all of our projects no matter how big or small. We are experts in our trade and will always keep you educated on your particular task or project. We look forward to earning your business!

"Talked to George and Jose and everything was great. On time, and minimal fuss! Only took about half a day to complete, so this was perfect. They bought the pump with no involvement from us, and works so much better than the old one. "

Hilja V on August 2025


Avatar for Accurate Heat-Air Services, Inc

Accurate Heat-Air Services, Inc

4.30(
10
)
Approved Pro

Accurate Heat-Air Services, Inc

4.30(
10
)
Approved Pro
Customers say: Super punctual
31 local quotes requested
36 years of experience

At Accurate Baker Elman we strive to provide prompt, professional quality service to our customers, suppliers and builders as well as encouraging the personal and professional growth of our employees.Accurate Heat-Air Services, Inc is a Certified Trane Comfort Specialist requiring us to be held to the highest performance standards in the industry.Trane Comfort Specialist are highly trained heating, air conditioning and air quality professionals who can transform indoor air like no one else. We are consistently rated 90% or higher in customer satisfaction surveys, and take great pride in exceeding every customer expectation. We pride ourselves on our Professionalism, Quality Service, Promptness, Excellant Customer Relations,and Highly Skilled and Trained Technicians. Our Sales Department provides FREE in home estimates, Friendly qualified professionals,Ease in helping you select the comfort system that best fits your needs and your budget and Customized Quotes. Accurate Heat-Air Services, Inc services the following counties in Massachusetts,Norfolk, Plymouth, Middlesex,Bristol and Worcester. we offer both Commercial and residential service and installations. We also offer Service Agreements.

"Very well, Frank Fitch quickly diagnosed the problem and gave me a quote for repairs and expertly made the repairs. Re-establishing the proper pressure and making the boiler ready to go. Felt like I had expert service and a fair price."

Stephen W on January 2025

At Accurate Baker Elman we strive to provide prompt, professional quality service to our customers, suppliers and builders as well as encouraging the personal and professional growth of our employees.Accurate Heat-Air Services, Inc is a Certified Trane Comfort Specialist requiring us to be held to the highest performance standards in the industry.Trane Comfort Specialist are highly trained heating, air conditioning and air quality professionals who can transform indoor air like no one else. We are consistently rated 90% or higher in customer satisfaction surveys, and take great pride in exceeding every customer expectation. We pride ourselves on our Professionalism, Quality Service, Promptness, Excellant Customer Relations,and Highly Skilled and Trained Technicians. Our Sales Department provides FREE in home estimates, Friendly qualified professionals,Ease in helping you select the comfort system that best fits your needs and your budget and Customized Quotes. Accurate Heat-Air Services, Inc services the following counties in Massachusetts,Norfolk, Plymouth, Middlesex,Bristol and Worcester. we offer both Commercial and residential service and installations. We also offer Service Agreements.

"Very well, Frank Fitch quickly diagnosed the problem and gave me a quote for repairs and expertly made the repairs. Re-establishing the proper pressure and making the boiler ready to go. Felt like I had expert service and a fair price."

Stephen W on January 2025


Avatar for Talf Builders

Talf Builders

5.00(
2
)
Approved Pro

Talf Builders

5.00(
2
)
Approved Pro
Customers say: Quick response
96 local quotes requested
5 years of experience

TALF Builders is a construction company based in Worcester, MA. We are specialize in both residential and commercial projects, offering a wide range of services including new construction, renovations, and remodeling. Our team is dedicated to delivering high-quality work, exclusive designs and ensuring customer satisfaction on every project.

"I recently hired them to fix a furnace that had stopped working and a smoke alarm that was not wired correctly. Cesar's responsiveness was excellent—he came out quickly and assessed the situation thoroughly. He even went into the attic space to locate and repair a faulty wire, which resolved the issue completely. The pricing was fair and transparent, and I felt the overall value of the service was outstanding. [Company Name] demonstrated professionalism, skill, and attention to detail throughout the process. I highly recommend them for anyone needing reliable and high-quality construction or repair work.""

Cheryl C on January 2025

TALF Builders is a construction company based in Worcester, MA. We are specialize in both residential and commercial projects, offering a wide range of services including new construction, renovations, and remodeling. Our team is dedicated to delivering high-quality work, exclusive designs and ensuring customer satisfaction on every project.

"I recently hired them to fix a furnace that had stopped working and a smoke alarm that was not wired correctly. Cesar's responsiveness was excellent—he came out quickly and assessed the situation thoroughly. He even went into the attic space to locate and repair a faulty wire, which resolved the issue completely. The pricing was fair and transparent, and I felt the overall value of the service was outstanding. [Company Name] demonstrated professionalism, skill, and attention to detail throughout the process. I highly recommend them for anyone needing reliable and high-quality construction or repair work.""

Cheryl C on January 2025


Avatar for Domination Plumbing and Heating

Domination Plumbing and Heating

4.80(
22
)
Approved Pro

Domination Plumbing and Heating

4.80(
22
)
Approved Pro
Customers say: True professional
12 local quotes requested
14 years of experience

Domination Plumbing and Heating is a locally owned and operated company based in Leominster MA, that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have 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! "We plumb it nice for a good price!"

"Domination Plumbing came out to my house on a Friday morning, provided an estimate that day, and scheduled the work for Monday morning. All work was performed quickly and efficiently. I absolutely recommend them and will call them again for any plumbing needs."

Jessica M on July 2025

Domination Plumbing and Heating is a locally owned and operated company based in Leominster MA, that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have 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! "We plumb it nice for a good price!"

"Domination Plumbing came out to my house on a Friday morning, provided an estimate that day, and scheduled the work for Monday morning. All work was performed quickly and efficiently. I absolutely recommend them and will call them again for any plumbing needs."

Jessica M on July 2025


Avatar for Village Home Services

Village Home Services

5.00(
13
)
Approved Pro

Village Home Services

5.00(
13
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
121 local quotes requested

Village Home Services formally known as Village Electric and Village HVAC. We stand at the intersection of expertise and community spirit. With our plumbing, electrical, and HVAC services, we go beyond fixing problems; we enrich lives, one home at a time. In our village, your comfort and safety are our top priorities.

"Addressed quickly and professionally"

Mary W on October 2025

Village Home Services formally known as Village Electric and Village HVAC. We stand at the intersection of expertise and community spirit. With our plumbing, electrical, and HVAC services, we go beyond fixing problems; we enrich lives, one home at a time. In our village, your comfort and safety are our top priorities.

"Addressed quickly and professionally"

Mary W on October 2025

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Heating and Air Conditioning questions, answered by experts

Is mold in an air conditioner dangerous? Running an air conditioner with mold isn’t safe because it can spread harmful mold spores throughout your home. These spores may cause respiratory problems, allergies, or aggravate asthma in household members and guests. If you suspect there is mold hiding in your air conditioner, it’s best to stop using the HVAC system until the mold is cleaned to avoid health risks and further contamination.

During the summer, it’s best to set your AC to 78 degrees when you’re home and awake, according to the Department of Energy (DOE). For better energy efficiency, raise the temperature slightly to 85 degrees while you’re out of the house. The National Sleep Foundation advises lowering your thermostat to between 60 and 67 degrees when you’re asleep.

Most HVAC companies charge a flat service call fee of between $75 and $150, which includes traveling to your home and inspecting your system to find the underlying problem. Keep in mind that these prices only include diagnostics and the actual repairs will usually be billed separately. If you’re calling for routine service, the service call will be included in your inspection and tune-up, with the total sitting around $150. Your prices could be a little higher if you have a very large home with multiple condensers and air handlers, as inspections and servicing take longer.

Window AC units use a fair amount of electricity during use, but the usage pales in comparison to central units. As a matter of fact, window units use around a third of the amount of energy as a central AC. On average, a window air conditioner costs between $15 and $40 per month to run, though this depends on a number of external factors.

It depends on the type of AC unit and the extent of the mold growth. For example, if you have a small amount of mold in your central air conditioner, it’s worth cleaning it to protect your HVAC system and your health. In situations like these, you can often remove the mold yourself in a couple of hours. On the other hand, if you have a portable AC unit with a severe mold problem, it makes more sense to buy a new one. On average, replacing a portable AC unit costs $100 to $500.

The South Lancaster, 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.