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    Average homeowner rating
  • Verified reviews icon97
    Verified heating oil services reviews

Find Heating oil pros in Millis

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
656 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!

"Great, as always. Sila is outstanding. We have a service contract with them for our furnace and AC and they keep them in tip-top shape. And when we have an urgent or emergency situation (heating, cooling, plumbing, electrical), they're who we call."

Jonathan P on November 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!

"Great, as always. Sila is outstanding. We have a service contract with them for our furnace and AC and they keep them in tip-top shape. And when we have an urgent or emergency situation (heating, cooling, plumbing, electrical), they're who we call."

Jonathan P on November 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
245 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 Gervais Plumbing & Heating Inc

Gervais Plumbing & Heating Inc

3.71(
7
)
Approved Pro

Gervais Plumbing & Heating Inc

3.71(
7
)
Approved Pro
Customers say: Quick response
60 local quotes requested

18 Years in Business Gervais Mechanical Service LLC is a fully licensed, local, family-run business. With more than 100 years of combined experience, we strive to bring our customers exceptional repair and installation services they can rely on. We offer turnkey solutions for both residential and commercial customers — no job is too large or complex for our expert team.

"Absolute ripoff, along with shady business practices. They were prompt and courteous, but that's about it. The technician came and had to replace a $200 part on my boiler, it took him under an hour to do the work. A simple Google search showed at least 10 places to buy the exact part, all around $200. No other parts were needed for this repair, I researched what is involved. I was charged almost $1000, including their $89 diagnostic fee just to walk in the door. So apparently it's a $600+/hour labor rate? I'm obviously in the wrong line of work. This was not an off hours emergency call either, it was a scheduled appointment in the middle of a weekday. The shadiest part of the entire thing was that on the invoice (that they email you later) they bury all the cost, it's not itemized i.e. labor vs parts cost. It just says replaced (part) = $1000. A super scummy and shady way to run a "professional" business, taking advantage of people who don't know any better. I wouldn't be surprised if they also sell used cars. Never again Gervais. You've all been warned."

Jeffrey J on January 2025

18 Years in Business Gervais Mechanical Service LLC is a fully licensed, local, family-run business. With more than 100 years of combined experience, we strive to bring our customers exceptional repair and installation services they can rely on. We offer turnkey solutions for both residential and commercial customers — no job is too large or complex for our expert team.

"Absolute ripoff, along with shady business practices. They were prompt and courteous, but that's about it. The technician came and had to replace a $200 part on my boiler, it took him under an hour to do the work. A simple Google search showed at least 10 places to buy the exact part, all around $200. No other parts were needed for this repair, I researched what is involved. I was charged almost $1000, including their $89 diagnostic fee just to walk in the door. So apparently it's a $600+/hour labor rate? I'm obviously in the wrong line of work. This was not an off hours emergency call either, it was a scheduled appointment in the middle of a weekday. The shadiest part of the entire thing was that on the invoice (that they email you later) they bury all the cost, it's not itemized i.e. labor vs parts cost. It just says replaced (part) = $1000. A super scummy and shady way to run a "professional" business, taking advantage of people who don't know any better. I wouldn't be surprised if they also sell used cars. Never again Gervais. You've all been warned."

Jeffrey J on January 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


Avatar for St Joseph Heating And Cooling

St Joseph Heating And Cooling

4.90(
5
)
Approved Pro

St Joseph Heating And Cooling

4.90(
5
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
4 years of experience

St Joseph Heating And Cooling 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.

"Very professional and very good work, super recommended!!"

Larissa L on April 2023

St Joseph Heating And Cooling 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.

"Very professional and very good work, super recommended!!"

Larissa L on April 2023


Forest Hills HVAC

4.91(
11
)
Approved Pro

Forest Hills HVAC

4.91(
11
)
Approved Pro
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
18 local quotes requested

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction, from the start to the completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every client in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"David did a great job clearing out clogged drains on mini splits and servicing all 7 units and 2 condensers. The amount of time he spent and thoroughness was clearly a step above the prior maintenance. Now we know what really needs to be done to keep the units working well, and recommend Forest Hills HVAC for any mini split system. Only drawback was that we got bumped a few times for emergency calls. We were not an emergency because we did have some functional units, so it is fair that we had to wait. If it was an emergency, I could have paid the emergency fee and gotten work done more quickly."

Joleen W on August 2024

We take great pride in our experience, expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction, from the start to the completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every client in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

"David did a great job clearing out clogged drains on mini splits and servicing all 7 units and 2 condensers. The amount of time he spent and thoroughness was clearly a step above the prior maintenance. Now we know what really needs to be done to keep the units working well, and recommend Forest Hills HVAC for any mini split system. Only drawback was that we got bumped a few times for emergency calls. We were not an emergency because we did have some functional units, so it is fair that we had to wait. If it was an emergency, I could have paid the emergency fee and gotten work done more quickly."

Joleen W on August 2024


Avatar for FL Home Services

FL Home Services

4.86(
7
)
Approved Pro

FL Home Services

4.86(
7
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
88 local quotes requested

We have the experience and dedication to get the job done right! Specializing in handyman services; We guarantee your satisfaction, and we won't leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Call or click for your FREE estimate today!

"Our deck looks great again!"

Heather M on August 2023

We have the experience and dedication to get the job done right! Specializing in handyman services; We guarantee your satisfaction, and we won't leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Call or click for your FREE estimate today!

"Our deck looks great again!"

Heather M on August 2023


Lightfoot Remodeling Company

4.14(
7
)
Approved Pro

Lightfoot Remodeling Company

4.14(
7
)
Approved Pro
39 years of experience
Free onsite estimate

We are a family run business with 38 years of service. Our specialty is interior remodeling. Kitchens, baths structural work, from demo to finish. All American crew. We provide quality work at a reasonable price. We do not use subcontractors. We have customers that have us back every year for scheduled maintenance of their homes and businesses.

"Excellent - highly recommend"

Mike K on March 2024

We are a family run business with 38 years of service. Our specialty is interior remodeling. Kitchens, baths structural work, from demo to finish. All American crew. We provide quality work at a reasonable price. We do not use subcontractors. We have customers that have us back every year for scheduled maintenance of their homes and businesses.

"Excellent - highly recommend"

Mike K on March 2024


Avatar for David M. Clay Plumbing& Heating

David M. Clay Plumbing& Heating

5.00(
16
)
Approved Pro

David M. Clay Plumbing& Heating

5.00(
16
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
81 local quotes requested

Clay Plumbing & Heating a locally owned and operated family business, has established itself as a reliable and leading provider of plumbing and heating services for the Central Massachusetts area since 2007 with over 20 years of experience. Our team provides a full range of plumbing services including boiler and water heater installation and repair. Every member of our team is fully trained to quickly and accurately diagnose any plumbing work that needs to be done. That way, when you have a situation that requires a professional plumber, you’ll feel confident in calling the Clay Plumbing & Heating team for help. Give us a call or click to request a quote today! We are just around the corner to help you with any problem! We also offer up to 100% financing up to $65,000.

"Very pleased with his service. He was competent and capable."

Jum B on September 2025

Clay Plumbing & Heating a locally owned and operated family business, has established itself as a reliable and leading provider of plumbing and heating services for the Central Massachusetts area since 2007 with over 20 years of experience. Our team provides a full range of plumbing services including boiler and water heater installation and repair. Every member of our team is fully trained to quickly and accurately diagnose any plumbing work that needs to be done. That way, when you have a situation that requires a professional plumber, you’ll feel confident in calling the Clay Plumbing & Heating team for help. Give us a call or click to request a quote today! We are just around the corner to help you with any problem! We also offer up to 100% financing up to $65,000.

"Very pleased with his service. He was competent and capable."

Jum B on September 2025


"Scott was great, offered a fair price, was flexible for scheduling, and finished the job quickly and well. We had a Bath fan install + an exterior electrical outlet installed and he was able to get it done within a few hours. The install looks clean and he took care to clean up afterwards too. Great work Scott! Thank you!"

Pawel L on September 2025

Are you looking for a quality electrician? If so, call Bettinger Electric, LLC today for excellent service. I will personally be on the job from start to finish. Hire a electrician not a salesman.

"Scott was great, offered a fair price, was flexible for scheduling, and finished the job quickly and well. We had a Bath fan install + an exterior electrical outlet installed and he was able to get it done within a few hours. The install looks clean and he took care to clean up afterwards too. Great work Scott! Thank you!"

Pawel L on September 2025

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Heating Oil questions, answered by experts

DIY maintenance like filter cleaning is possible, but professional servicing ensures proper pressure, refrigerant levels, and loop performance.

The most obvious downside is the high upfront cost of buying and installing one of these systems. Additionally, sometimes the system can take a longer time to heat than alternatives like a boiler. Also, if something goes wrong with the geothermal pump, repairs are often significantly more expensive than repairing traditional, above-ground heat pumps.

You need to service an HVAC system about twice per year, with a service including an inspection and basic maintenance. It’s best to schedule maintenance in the spring (after the furnace has been running and before the AC kicks on) and in the fall (after the AC worked hard all summer and before winter’s first chill arrives). 

Regular HVAC services will keep the system working as efficiently as possible, saving you money on utilities and larger repairs. HVAC maintenance costs around $250 per visit, while bigger repairs from forgotten upkeep could cost thousands.

Your HVAC manufacturer will give you instructions on how often you should service your system. Have your unit professionally serviced at least once a year when in doubt. 

Heat pump systems are different because they provide heating and cooling solutions for your home. In this case, you should have it serviced at least twice a year.

Costs depend on system age, type, labor, and whether part replacements are necessary.

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