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  • Verified reviews icon267
    Verified heating oil services reviews

Find Heating oil pros in Sag Harbor

Avatar for Mayjac Plumbing, Inc.

Mayjac Plumbing, Inc.

4.92(
13
)
Approved Pro

Mayjac Plumbing, Inc.

4.92(
13
)
Approved Pro
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
10 years of experience

At MayJac Plumbing Inc. we're dedicated to providing our clients with the very best service, installation, and repairs for all phases of their plumbing needs. We specialize in a variety of residential and commercial services and take pride in the attention to detail we put into each of the projects we're involved with. Our goal at MayJac is to maintain a relationship with every customer for life. MayJac Plumbing Inc. is fully licensed and insured. We have over 18 years of experience. Call us today at (631) 909-1829 to discuss your all plumbing needs!

"Joe was great."

Nicholas U on June 2024

At MayJac Plumbing Inc. we're dedicated to providing our clients with the very best service, installation, and repairs for all phases of their plumbing needs. We specialize in a variety of residential and commercial services and take pride in the attention to detail we put into each of the projects we're involved with. Our goal at MayJac is to maintain a relationship with every customer for life. MayJac Plumbing Inc. is fully licensed and insured. We have over 18 years of experience. Call us today at (631) 909-1829 to discuss your all plumbing needs!

"Joe was great."

Nicholas U on June 2024


Avatar for Surefire Mechanical Corporation

Surefire Mechanical Corporation

4.68(
146
)
Approved Pro

Surefire Mechanical Corporation

4.68(
146
)
Approved Pro
Customers say: Quick response
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
12 years of experience

Surefire Mechanical Corporation specializes in HVAC repair and is ready to be your go-to Long Island plumber as well! We install and service all forms of residential and light commercial heating and air conditioning equipment, as well as offering various plumbing and electrical services!

"I sent a message to the company in the late evening regarding my broken central AC and Jason was here Tuesday morning to look at it. He tried to repair it but was not able to due to the age of the unit and the damage. We needed a new unit and he was here to put it in first thing Wednesday morning. Took him two hours and our AC was working. He was nice and professional. We felt the price was reasonable. Would use him again and recommend his business."

Janelle L on August 2022

Surefire Mechanical Corporation specializes in HVAC repair and is ready to be your go-to Long Island plumber as well! We install and service all forms of residential and light commercial heating and air conditioning equipment, as well as offering various plumbing and electrical services!

"I sent a message to the company in the late evening regarding my broken central AC and Jason was here Tuesday morning to look at it. He tried to repair it but was not able to due to the age of the unit and the damage. We needed a new unit and he was here to put it in first thing Wednesday morning. Took him two hours and our AC was working. He was nice and professional. We felt the price was reasonable. Would use him again and recommend his business."

Janelle L on August 2022


"I contracted with Grant Heating & Cooling Inc. to install HVAC system in my home in the spring of 2024. They were very professional and did a very good job. In the winter of 2025 I had a minor problem with one of the Mitsubishi heat pump system units. The company was quick to troubleshoot the situation. The technicians were courteous, knowledgeable about the system and thorough. It required several visits to diagnose the problem and fix it. The manager, Nick was very responsive to the situation which required bringing out an expert from Mitsubishi. All of this work was covered under my warranty. The problem was fixed and I could not speak highly enough about the company’s policies and customer service. I would highly recommend them for all facets of their work and standing behind their installations. I am very happy to be working with them for my continued maintenance. They are an excellent company. Sincerely, Susan Coursey"

Susan C on May 2025

Family owned and operated since 1969, Grant Heating & Cooling is a knowledgeable and dependable resource for meeting all your comfort needs. Contact us for installation, maintenance or service

"I contracted with Grant Heating & Cooling Inc. to install HVAC system in my home in the spring of 2024. They were very professional and did a very good job. In the winter of 2025 I had a minor problem with one of the Mitsubishi heat pump system units. The company was quick to troubleshoot the situation. The technicians were courteous, knowledgeable about the system and thorough. It required several visits to diagnose the problem and fix it. The manager, Nick was very responsive to the situation which required bringing out an expert from Mitsubishi. All of this work was covered under my warranty. The problem was fixed and I could not speak highly enough about the company’s policies and customer service. I would highly recommend them for all facets of their work and standing behind their installations. I am very happy to be working with them for my continued maintenance. They are an excellent company. Sincerely, Susan Coursey"

Susan C on May 2025


Avatar for Neversweat Property Management

Neversweat Property Management

5.00(
4
)
Approved Pro

Neversweat Property Management

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

Neversweat Property Management specializes in the care and maintenance of properties in the picturesque East End of Long Island. Our dedicated team offers a comprehensive range of services, including property management, seasonal house care, and handyman repairs. With a passion for excellence and a commitment to property owners, we ensure that each property thrives, allowing our clients to enjoy peace of mind and the full experience of East End living. At Neversweat, we take care of your property as if it were our own, making your investment our responsibility.

"Everything went great, went over and above to make sure that we were pleased with the job."

Carlos F on November 2023

Neversweat Property Management specializes in the care and maintenance of properties in the picturesque East End of Long Island. Our dedicated team offers a comprehensive range of services, including property management, seasonal house care, and handyman repairs. With a passion for excellence and a commitment to property owners, we ensure that each property thrives, allowing our clients to enjoy peace of mind and the full experience of East End living. At Neversweat, we take care of your property as if it were our own, making your investment our responsibility.

"Everything went great, went over and above to make sure that we were pleased with the job."

Carlos F on November 2023



Avatar for Pop Audio

Pop Audio

5.00(
19
)
Approved Pro

Pop Audio

5.00(
19
)
Approved Pro
Customers say: Quality work
22 local quotes requested
2 years of experience

At POP Audio, we believe in keeping things real and straightforward. When it comes to your Residential A/V needs, we've got you covered with a no-nonsense approach. We take the time to understand your unique requirements and budget, ensuring you get the perfect audio and visual setup without any unnecessary frills. We're not about flashy sales pitches; we're about delivering top-notch products and services that fit seamlessly into your home, elevating your entertainment experience. With our reliable solutions, personalized guidance, and genuine passion for A/V, you can trust us to bring your home entertainment dreams to life without the hassle. Choose POP Audio and experience residential A/V done right.

"Ken and Nick were super professional and very nice/easy to work with! I will definitely be using them again :)."

Allison D on October 2025

At POP Audio, we believe in keeping things real and straightforward. When it comes to your Residential A/V needs, we've got you covered with a no-nonsense approach. We take the time to understand your unique requirements and budget, ensuring you get the perfect audio and visual setup without any unnecessary frills. We're not about flashy sales pitches; we're about delivering top-notch products and services that fit seamlessly into your home, elevating your entertainment experience. With our reliable solutions, personalized guidance, and genuine passion for A/V, you can trust us to bring your home entertainment dreams to life without the hassle. Choose POP Audio and experience residential A/V done right.

"Ken and Nick were super professional and very nice/easy to work with! I will definitely be using them again :)."

Allison D on October 2025


Avatar for Housitive Pbc

Housitive Pbc

5.00(
7
)
Approved Pro

Housitive Pbc

5.00(
7
)
Approved Pro
Super Service Award
Customers say: Quick response
31 local quotes requested
2 years of experience

We are bringing our years of experience with mini-split heat pumps from Central New York to Long Island. Properly installed and maintained mini-splits are an efficient heating and cooling solution for most Long Island homes. At Housitive, we seek to serve our communities by providing the best mini-split installations and the best customer experience. We are committed to raising the bar for quality and efficiency and to creating a smooth, transparent process from first contact to completed project. We believe that mini-splits are a great choice for our homes, our communities, and our environment–and we want you to be as excited about them as we are, so we can together accelerate our transition away from fossil fuels!

"Communication and honestly was great from start to finish. They aligned to the vision we wanted with agreeable recommendations. They were clean and timely with the project and the final outcome was more than what was expected. I recommend them."

Christopher O on June 2025

We are bringing our years of experience with mini-split heat pumps from Central New York to Long Island. Properly installed and maintained mini-splits are an efficient heating and cooling solution for most Long Island homes. At Housitive, we seek to serve our communities by providing the best mini-split installations and the best customer experience. We are committed to raising the bar for quality and efficiency and to creating a smooth, transparent process from first contact to completed project. We believe that mini-splits are a great choice for our homes, our communities, and our environment–and we want you to be as excited about them as we are, so we can together accelerate our transition away from fossil fuels!

"Communication and honestly was great from start to finish. They aligned to the vision we wanted with agreeable recommendations. They were clean and timely with the project and the final outcome was more than what was expected. I recommend them."

Christopher O on June 2025


Avatar for MSD Heating & Cooling

MSD Heating & Cooling

4.92(
60
)
Approved Pro

MSD Heating & Cooling

4.92(
60
)
Approved Pro
Customers say: Quality work
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers
207 local quotes requested

NOTE I M SORRY FOR ALL , WE NOT DOING ANY TYPE OF PLUMBING, WORK. OIL FURNACE,OIL BOILER , OIL HOT WATER HEATER, WE ARE DOING GAS FURNACE, AND HEAT PUMP SYSTEM HEATING AND AIR CONDITIONING.THAT'S ALL , WE DONT DO BASEBOARD, RADIANT,ANY OIL APPLIANCE OR PLUMBING WORK . THANKS FOR UNDERSTANDING. MSD Heating and Cooling is now offering free estimates for all AC replacements and new installations. We have been in the business for over 18 years and we've been lucky enough to learn a thing or two over those years. We've even worked hard to make sure that our staff knows the most up-to-date information about all of your heating and cooling needs. Keeping you cool and warm is our goal!

"Reasonable price great work friendly and very clean staff"

Huseyin A on May 2022

NOTE I M SORRY FOR ALL , WE NOT DOING ANY TYPE OF PLUMBING, WORK. OIL FURNACE,OIL BOILER , OIL HOT WATER HEATER, WE ARE DOING GAS FURNACE, AND HEAT PUMP SYSTEM HEATING AND AIR CONDITIONING.THAT'S ALL , WE DONT DO BASEBOARD, RADIANT,ANY OIL APPLIANCE OR PLUMBING WORK . THANKS FOR UNDERSTANDING. MSD Heating and Cooling is now offering free estimates for all AC replacements and new installations. We have been in the business for over 18 years and we've been lucky enough to learn a thing or two over those years. We've even worked hard to make sure that our staff knows the most up-to-date information about all of your heating and cooling needs. Keeping you cool and warm is our goal!

"Reasonable price great work friendly and very clean staff"

Huseyin A on May 2022


Avatar for AUREO BUILDING TECHNOLOGIES

AUREO BUILDING TECHNOLOGIES

5.00(
6
)

AUREO BUILDING TECHNOLOGIES

5.00(
6
)
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

We are a full service HVAC company. We service, repair, maintain and install all types of Air Conditioning, Heating and Air distribution systems. Central Air and Heat, Package roof top units, Split units, Glycol, Chilled water, Hydronic, Steam, Heat pump and Ductless units are all a part of what we do! We offer excellent service at competitive, fair pricing and deliver results with a well rounded, professional staff.

"They did a great job and they were very thorough. They had a great customer service. They were very responsible and always on time."

Kelvin T on September 2021

We are a full service HVAC company. We service, repair, maintain and install all types of Air Conditioning, Heating and Air distribution systems. Central Air and Heat, Package roof top units, Split units, Glycol, Chilled water, Hydronic, Steam, Heat pump and Ductless units are all a part of what we do! We offer excellent service at competitive, fair pricing and deliver results with a well rounded, professional staff.

"They did a great job and they were very thorough. They had a great customer service. They were very responsible and always on time."

Kelvin T on September 2021


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Heating Oil questions, answered by experts

It’s a better use of energy (and your money) NOT to run an ERV system all the time. Most experts recommend that you cycle your ERV system on and off throughout the year. However, the recommended advice could change based on your climate, the number of people in your home, the size and style of your home, and your heating and cooling system. Contact a local pro for more specific advice.

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

For most systems, an annual HVAC system service is more than enough. Some homeowners prefer a twice-a-year visit to ensure the system is ready for the upcoming summer and winter seasons. If you need to call an HVAC pro more often than this, it may be time to check if your system is getting old enough for a replacement.

If a geothermal heat pump is installed correctly, then you shouldn’t have to worry about having a backup heat source such as a furnace or oil boiler. However, there are geothermal systems installed that include a backup in case the heat pump fails due to extreme cold. This is simply a backup heat pump you’ll likely never need and not an alternative heat source.

NATE-certified technicians may charge slightly higher service fees compared to non-certified technicians. This is because NATE certification signifies a higher level of expertise and professionalism, often leading to more efficient and effective HVAC repairs and installations. While the upfront cost may be marginally higher, NATE-certified technicians can potentially save you money in the long run by reducing energy consumption, preventing frequent breakdowns, and extending the life span of your HVAC system. When looking for a local HVAC company to hire, it never hurts to ask about NATE certifications.

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