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TRUSTED BY COLD SPRING HARBOR, NY HOMEOWNERS

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    Average homeowner rating
  • Verified reviews icon903
    Verified boiler installation services reviews

Find Boiler installation pros in Cold Spring Harbor

Avatar for Cs mechanical inc

Cs mechanical inc

Based In
4.98(
48
)
Approved Pro

Cs mechanical inc

Based In
4.98(
48
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
36 local quotes requested

With over 15 years of experience, cs mechanical, Inc. is your trusted partner for all your plumbing and home improvements needs -Pipe repairs -New installation -Water Heaters -shower body’s -faucet and sink repair -Toliet install - wash machine install - dishwasher install

"Chris was very professional. He was on time and did a good job. I would use his services again and I would definitely recommend him."

Frank M on August 2025

With over 15 years of experience, cs mechanical, Inc. is your trusted partner for all your plumbing and home improvements needs -Pipe repairs -New installation -Water Heaters -shower body’s -faucet and sink repair -Toliet install - wash machine install - dishwasher install

"Chris was very professional. He was on time and did a good job. I would use his services again and I would definitely recommend him."

Frank M on August 2025


Avatar for Universe Home Services

Universe Home Services

3782 Merrick Rd
4.53(
444
)
Approved Pro

Universe Home Services

3782 Merrick Rd
4.53(
444
)
Approved Pro
Customers say: Super punctual
542 local quotes requested
71 years of experience

Since 1954, Universe Home Services has been proudly serving the Nassau County community and customers throughout the entire region. With Universe Home Services, one call solves it all! Their highly trained technicians offer everything from heating and air conditioning to plumbing to appliance repair and electrical services on Long Island and beyond. Whether you’re dealing with an inefficient heating system, a noisy air conditioner, clogged toilet, broken dishwasher, or outdated electrical service panel, you can get the fast, affordable service you need with Universe Home Services. They go above and beyond to ensure that you’re completely satisfied with the quality of their work, offering service guarantees and parts and labor guarantees on new HVAC installations. As a family owned and operated company, Universe Home Services believes in top-quality customer service. They always treat you and your property with respect, working quickly, cleanly, and efficiently to minimize your inconvenience and leave your home in pristine condition. With more than 60 years of experience under their belt, and a commitment to unmatched quality, honesty, and expertise, Universe Home Services is the trusted name for heating, air conditioning, electrical, plumbing, and appliance repair on Long Island and beyond! Call today!

"Initially, working with Universe went very well when we replaced a central air unit and installed a single-head and triple-head ductless unit... for about 1 season. After that, numerous issues arose (under warranty) from full line-replacement on the ductless units to having to come back to repair a wired connection that was reversed. This caused the AC to not work and have lots of moisture leak through our units. Additionally, pretty much EVERY season we have had an issue with our "brand new efficient systems" not working or failing. We leveraged the warranty and figured all the "kinks" of the installation were worked out over the first few years. Now, with the warranty expired for a year, we have had to have them back to our house several times with a service charge with absolutely zero consideration for the large project we have done with them and our dedicated customer history. We paid for those, thinking we would be done with repairs, as the tech said... Two days ago, with one single-head unit not powering up, they wanted to charge $285 just to show up to take a look at the issue... couldn't even send someone over when convenient to take a quick look... Severely disappointed in this "family business" that treats loyal/dedicated customers as a number. Their installation of ductless systems seems mediocre at best."

Keith M on August 2022

Since 1954, Universe Home Services has been proudly serving the Nassau County community and customers throughout the entire region. With Universe Home Services, one call solves it all! Their highly trained technicians offer everything from heating and air conditioning to plumbing to appliance repair and electrical services on Long Island and beyond. Whether you’re dealing with an inefficient heating system, a noisy air conditioner, clogged toilet, broken dishwasher, or outdated electrical service panel, you can get the fast, affordable service you need with Universe Home Services. They go above and beyond to ensure that you’re completely satisfied with the quality of their work, offering service guarantees and parts and labor guarantees on new HVAC installations. As a family owned and operated company, Universe Home Services believes in top-quality customer service. They always treat you and your property with respect, working quickly, cleanly, and efficiently to minimize your inconvenience and leave your home in pristine condition. With more than 60 years of experience under their belt, and a commitment to unmatched quality, honesty, and expertise, Universe Home Services is the trusted name for heating, air conditioning, electrical, plumbing, and appliance repair on Long Island and beyond! Call today!

"Initially, working with Universe went very well when we replaced a central air unit and installed a single-head and triple-head ductless unit... for about 1 season. After that, numerous issues arose (under warranty) from full line-replacement on the ductless units to having to come back to repair a wired connection that was reversed. This caused the AC to not work and have lots of moisture leak through our units. Additionally, pretty much EVERY season we have had an issue with our "brand new efficient systems" not working or failing. We leveraged the warranty and figured all the "kinks" of the installation were worked out over the first few years. Now, with the warranty expired for a year, we have had to have them back to our house several times with a service charge with absolutely zero consideration for the large project we have done with them and our dedicated customer history. We paid for those, thinking we would be done with repairs, as the tech said... Two days ago, with one single-head unit not powering up, they wanted to charge $285 just to show up to take a look at the issue... couldn't even send someone over when convenient to take a quick look... Severely disappointed in this "family business" that treats loyal/dedicated customers as a number. Their installation of ductless systems seems mediocre at best."

Keith M on August 2022


Avatar for Varsity Home Service

Varsity Home Service

1610 Ocean Ave
4.30(
83
)
Approved Pro

Varsity Home Service

1610 Ocean Ave
4.30(
83
)
Approved Pro
Customers say: Super punctual
182 local quotes requested
63 years of experience

Practice makes perfect, and Varsity has been at it for over half a century! What began with a Navy veteran’s simple dream — to teach the value of honest, hands-on work to his children — has grown into one of Long Island’s most trusted resource for plumbing, heating and air conditioning services. Varsity’s mission has always been clear: to serve our neighbors with integrity, solve home service challenges with innovative solutions, and provide lasting results. Our dedicated crew is background-checked, rigorously trained in the latest technology, and excited to exceed your expectations. Above all Varsity is here to EARN your trust—not just for today, but for years to come. Let’s tackle your home service needs with the quality and care you deserve!

"Efficient and clear process, nice crew, quick and clean execution. It would score 4.5 as there were a couple of opportunities for improvement identified (including surprising problems with running a communication cable, and a trivial unnoticed misconnection sorted out the next day by a dedicated technical help call), but overall an outstanding service."

Claudio M on September 2025

Practice makes perfect, and Varsity has been at it for over half a century! What began with a Navy veteran’s simple dream — to teach the value of honest, hands-on work to his children — has grown into one of Long Island’s most trusted resource for plumbing, heating and air conditioning services. Varsity’s mission has always been clear: to serve our neighbors with integrity, solve home service challenges with innovative solutions, and provide lasting results. Our dedicated crew is background-checked, rigorously trained in the latest technology, and excited to exceed your expectations. Above all Varsity is here to EARN your trust—not just for today, but for years to come. Let’s tackle your home service needs with the quality and care you deserve!

"Efficient and clear process, nice crew, quick and clean execution. It would score 4.5 as there were a couple of opportunities for improvement identified (including surprising problems with running a communication cable, and a trivial unnoticed misconnection sorted out the next day by a dedicated technical help call), but overall an outstanding service."

Claudio M on September 2025


Avatar for PRIORITY CESSPOOL SEWER & DRAIN, INC

PRIORITY CESSPOOL SEWER & DRAIN, INC

PO Box 450
4.82(
260
)
Approved Pro

PRIORITY CESSPOOL SEWER & DRAIN, INC

PO Box 450
4.82(
260
)
Approved Pro
Customers say: Quality work
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
137 local quotes requested

At Priority Cesspool we Install, service and maintaine cesspool & septic systems as well as providing sewer & drain cleaning services. Priority Cesspool is a full service cesspool, sewer & drain company. N.Y.S. Dec Lic # 1A-873 Member L.I.L.W.A. (L.I. Liquid Waste Ass.) Member B.B.B. Suffolk County License #44528-LW DBA of Clear River Environmental Service Corp

"Everything went well"

Jeanne D on August 2024

At Priority Cesspool we Install, service and maintaine cesspool & septic systems as well as providing sewer & drain cleaning services. Priority Cesspool is a full service cesspool, sewer & drain company. N.Y.S. Dec Lic # 1A-873 Member L.I.L.W.A. (L.I. Liquid Waste Ass.) Member B.B.B. Suffolk County License #44528-LW DBA of Clear River Environmental Service Corp

"Everything went well"

Jeanne D on August 2024


Eyeris Industries LTD

PO Box 1112
New on AngiNew on Angi
Approved Pro

Eyeris Industries LTD

PO Box 1112
New on AngiNew on Angi
Approved Pro
19 years of experience

At Eyeris Industries LTD, we pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all the work we perform. We are experts, and will always keep you educated about the work process. We look forward to earning your business!

At Eyeris Industries LTD, we pride our company on reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all the work we perform. We are experts, and will always keep you educated about the work process. We look forward to earning your business!


Z-Rite Plumbing & Heating, Corp.

615 Acorn Street, Suite G
3.58(
6
)
Approved Pro

Z-Rite Plumbing & Heating, Corp.

615 Acorn Street, Suite G
3.58(
6
)
Approved Pro
24 years of experience
Free onsite estimate

We are a family owned and operated business! With over 21 years of experience in the plumbing industry, we are the experts you need to take care of your home or business. We will treat your home or business as we would treat our own. Give us a call today, we look forward to working with you for all your plumbing needs!

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Roy W on June 2020

We are a family owned and operated business! With over 21 years of experience in the plumbing industry, we are the experts you need to take care of your home or business. We will treat your home or business as we would treat our own. Give us a call today, we look forward to working with you for all your plumbing needs!

"null"

Roy W on June 2020


"Granville House Victorians L.L.C. is extremely skilled and professional. My Victorian style house came out better than I could have dreamed. Granville took care of everything and they are extremely knowledgeable in what they do."

Jonathan P on January 2023

The linkedin site will tell our Story. Clients will take advantage of Granville's in house Design capabilities with CAD. see granvillevictorians.com for examples of our work

"Granville House Victorians L.L.C. is extremely skilled and professional. My Victorian style house came out better than I could have dreamed. Granville took care of everything and they are extremely knowledgeable in what they do."

Jonathan P on January 2023


Avatar for AAA Dependable Cesspool, Sewer & Drain Service, Inc.

AAA Dependable Cesspool, Sewer & Drain Service, Inc.

PO Box 772
4.88(
267
)
Approved Pro

AAA Dependable Cesspool, Sewer & Drain Service, Inc.

PO Box 772
4.88(
267
)
Approved Pro
Super Service Award
Customers say: Quality work
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
62 local quotes requested

We aren't just a Cesspool Company – We're your neighbors, and we’ve been proudly serving the Suffolk community for over 28 years. Being a Family owned company we understand how important it is to have a reliable team you can trust. From emergencies to routine maintenance we’ve got you. Our customers satisfaction is our number one priority, and we’re always here to help with honest, affordable service. We run frequent maintenance specials. As a special thank you, we offer discounts for Military, First Responders, and Seniors because we appreciate all that you do. Give us a call today – we’re ready to help!

"Melissa was wonderful to work with. Easy going,professional Made me feel comfortable. The prices are very good. Jeff who came to my home was again wonderful, very knowledgeable. Explained everything in detail. They are coming to do the work.thiscus someone yiu can trust to do the right job. Highly recommend them. "

Christine T on September 2025

We aren't just a Cesspool Company – We're your neighbors, and we’ve been proudly serving the Suffolk community for over 28 years. Being a Family owned company we understand how important it is to have a reliable team you can trust. From emergencies to routine maintenance we’ve got you. Our customers satisfaction is our number one priority, and we’re always here to help with honest, affordable service. We run frequent maintenance specials. As a special thank you, we offer discounts for Military, First Responders, and Seniors because we appreciate all that you do. Give us a call today – we’re ready to help!

"Melissa was wonderful to work with. Easy going,professional Made me feel comfortable. The prices are very good. Jeff who came to my home was again wonderful, very knowledgeable. Explained everything in detail. They are coming to do the work.thiscus someone yiu can trust to do the right job. Highly recommend them. "

Christine T on September 2025


"Very professional. He assessed the problem then explained to me the cost and we went ahead and he fixed in all in a few hours. Very satisfied"

Darlene W on July 2025

With over 30 years of experience, we work hard to bring each customer the best possible service and quality available. We look forward to working with you on your next project. We welcome your questions and thank you for your interest.

"Very professional. He assessed the problem then explained to me the cost and we went ahead and he fixed in all in a few hours. Very satisfied"

Darlene W on July 2025


Avatar for P.J. Fitzpatrick, LLC

P.J. Fitzpatrick, LLC

21 Industrial Boulevard
4.48(
432
)
Approved Pro

P.J. Fitzpatrick, LLC

21 Industrial Boulevard
4.48(
432
)
Approved Pro
Customers say: Quality work
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
142 local quotes requested

Why? Quite simply, because we strive for perfection. If you are hoping we will use cheaper materials, hurry through an installation, or overlook restrictions, P.J. Fitzpatrick, LLC, is not the company for you. We believe that when it comes to your home, the job should be done perfectly and last a lifetime. This might not make us the cheapest company in the area, but we stand behind our work and leave our customers extremely satisfied. So much that they refer friends, family and neighbors without hesitation. If something goes wrong with our installation, it's not your fault, it's ours. Our responsibility doesn't end once we pack up our tools and leave. If something breaks, malfunctions, or just plain doesn't make you happy, we'll fix it - for as long as you live in your home. Full lifetime warranties are included with many of our services. We also have 18 Repair Experts who do repairs all day, every day and love it! Experience the P.J. Fitzpatrick, LLC., difference today!

"Very professional and curteous"

Wilbur B on February 2023

Why? Quite simply, because we strive for perfection. If you are hoping we will use cheaper materials, hurry through an installation, or overlook restrictions, P.J. Fitzpatrick, LLC, is not the company for you. We believe that when it comes to your home, the job should be done perfectly and last a lifetime. This might not make us the cheapest company in the area, but we stand behind our work and leave our customers extremely satisfied. So much that they refer friends, family and neighbors without hesitation. If something goes wrong with our installation, it's not your fault, it's ours. Our responsibility doesn't end once we pack up our tools and leave. If something breaks, malfunctions, or just plain doesn't make you happy, we'll fix it - for as long as you live in your home. Full lifetime warranties are included with many of our services. We also have 18 Repair Experts who do repairs all day, every day and love it! Experience the P.J. Fitzpatrick, LLC., difference today!

"Very professional and curteous"

Wilbur B on February 2023

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Install Boiler questions, answered by experts

Coolant and antifreeze are technically not the same thing. The difference between the two is the ratio of water to other chemicals. True antifreeze is mainly made up of either ethylene glycol or propylene glycol, while coolant comprises one part antifreeze and one part water. However, the terms coolant and antifreeze are often used interchangeably, even by pros.

Once you install your boiler, you can expect it to last for at least 10 to 15 years. Maximize the lifespan of your boiler by choosing a quality boiler, installing it properly, and having it professionally maintained each year. In the event that your boiler does need repair, address any issues immediately.

On average, you’ll need about two gallons of oil per day to heat your house when it’s 50 degrees Fahrenheit outside. Most oil tank capacity is about 275 gallons, and heating your house with two gallons of oil per day will last about four and a half months. This consumption will vary depending on the climate and average temperature in your location. For example, if the winters are longer and colder where you live, you’ll probably need to refill your oil tank at least once to get through the winter.

It is almost always more affordable to repair a radiator than it is to replace one. The average radiator repair cost is around $150, and it’s typically about ten times as expensive—around $1,500—to replace a radiator. A repair usually takes under an hour, too, while a replacement can take several hours, making it less of a time commitment to repair one.

If you're often struggling with radiator issues like chilly spots, leaks, or annoying noises, those are common indications that your radiator may need to be replaced. Corrosion, uneven heating, and persistent hissing sounds are common issues as well. When repairs become a regular chore and your home’s energy bills start to rise, a new radiator will bring the comfort and savings you need.

The Cold Spring Harbor, NY homeowners’ guide to boiler installation services

From average costs to expert advice, get all the answers you need to get your job done.