Top-rated furnace / forced air heating system install or replace pros.

Get matched with top furnace / forced air heating system install or replace pros in West Islip, NY

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Find Furnace / forced air heating system install or replace pros in West Islip

Avatar for NJM Mechanical and Contracting Corp.

NJM Mechanical and Contracting Corp.

4.68(
55
)
•Approved Pro

NJM Mechanical and Contracting Corp.

4.68(
55
)
•Approved Pro
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
21 years of experience

At NJM Mechanical & Contracting Corp., we take great pride in our experience, expertise, quality and customer service that we provide to meet the consumers needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to 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 customer in a professional manner. Our reputation is based on service, safety and quality, regardless of how large or small the job. Call us today!

"Professional, timely, clean, and delivered as promised."

Christopher A on November 2021

At NJM Mechanical & Contracting Corp., we take great pride in our experience, expertise, quality and customer service that we provide to meet the consumers needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to 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 customer in a professional manner. Our reputation is based on service, safety and quality, regardless of how large or small the job. Call us today!

"Professional, timely, clean, and delivered as promised."

Christopher A on November 2021

Avatar for Deer Park Ave Heating & Air Conditioning Corporation

Deer Park Ave Heating & Air Conditioning Corporation

4.53(
51
)
•Approved Pro

Deer Park Ave Heating & Air Conditioning Corporation

4.53(
51
)
•Approved Pro
Customers say: Quick response
Recommended by 92% of Angi customers
Recommended by 92% of HomeAdvisor customers
13 years of experience

Deer Park Ave Heating & Air Conditioning Corporation is a family business that offers friendly service from experienced and professional technicians. Our goal is to be the most competitive HVAC Company on Long Island without compromising our quality of work. Call us today for all your heating, air conditioning, humidification and hot water needs. Home Improvement License # - 54823-H (HVAC) Electrical Licence # - 57182-RE (HVAC) Plumbing License # - 57534-RP

"5 star"

Lisa J on June 2022

Deer Park Ave Heating & Air Conditioning Corporation is a family business that offers friendly service from experienced and professional technicians. Our goal is to be the most competitive HVAC Company on Long Island without compromising our quality of work. Call us today for all your heating, air conditioning, humidification and hot water needs. Home Improvement License # - 54823-H (HVAC) Electrical Licence # - 57182-RE (HVAC) Plumbing License # - 57534-RP

"5 star"

Lisa J on June 2022

Eyeris Industries LTD

New on HomeAdvisorNew on HomeAdvisor
•Approved Pro

Eyeris Industries LTD

New on HomeAdvisorNew on HomeAdvisor
•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!

Avatar for Garmer Industries, Inc.

Garmer Industries, Inc.

4.55(
119
)
•Approved Pro

Garmer Industries, Inc.

4.55(
119
)
•Approved Pro
Customers say: Quick response
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
60 years of experience

Garmer Industries is your trusted source for all of your home and business heating and air conditioning needs. With 50 years of experience, quality is a guarantee. We keep you comfortable.

"Honest and were great."

Ankur M on February 2024

Garmer Industries is your trusted source for all of your home and business heating and air conditioning needs. With 50 years of experience, quality is a guarantee. We keep you comfortable.

"Honest and were great."

Ankur M on February 2024

Avatar for Varsity Home Service Company, Inc.

Varsity Home Service Company, Inc.

4.79(
194
)
•Approved Pro

Varsity Home Service Company, Inc.

4.79(
194
)
•Approved Pro
Customers say: Quality work
333 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!

"Joe was great…very professional."

Tricia H on October 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!

"Joe was great…very professional."

Tricia H on October 2025

Avatar for Harbour View Electric

Harbour View Electric

4.92(
117
)
•Approved Pro

Harbour View Electric

4.92(
117
)
•Approved Pro
Customers say: True professional
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
27 years of experience

At Harbour View Electric, Inc., 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!

"Great job! Would definitely hire again. Quick response. Fair price. Professional work. "

Alice B on June 2025

At Harbour View Electric, Inc., 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!

"Great job! Would definitely hire again. Quick response. Fair price. Professional work. "

Alice B on June 2025

New York HVAC Corporation

4.75(
45
)
•Approved Pro

New York HVAC Corporation

4.75(
45
)
•Approved Pro
Customers say: Quality work
Recommended by 91% of Angi customers
Recommended by 91% of HomeAdvisor customers
13 years of experience

Thank you for visiting we have over 30 years of experience in the business. Here at New York HVAC Corporation we pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! We are fully licensed and insured.

"I never leave bad reviews but feel compelled to warn people not to use this man's service. The most unprofessional, short tempered and hostile man. I am a young mother with a 3 month old infant, so getting our hvac fixed is crucial. Vinny canceled on us last minute and rescheduled twice, he bad mouthed other companies who had worked on our system previously, he told us to run our own wires, and then called my father in law stupid for doing it wrong. When I interjected saying that that wasn't very nice and asked my father if we should call someone else, he became irate, yelled at me for saying something, said i ?should mind my business? in my own home, raised his voice loud enough to startle my infant and made him cry, said he ?should have pushed us down the stairs?, and stormed out of the house like a disgruntled prima-donna. The whole situation left me and my baby rattled. This man thinks that the demand for his trade entitles him to speak down to and mistreat customers.Go elsewhere."

amy m on April 2025

Thank you for visiting we have over 30 years of experience in the business. Here at New York HVAC Corporation we pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! We are fully licensed and insured.

"I never leave bad reviews but feel compelled to warn people not to use this man's service. The most unprofessional, short tempered and hostile man. I am a young mother with a 3 month old infant, so getting our hvac fixed is crucial. Vinny canceled on us last minute and rescheduled twice, he bad mouthed other companies who had worked on our system previously, he told us to run our own wires, and then called my father in law stupid for doing it wrong. When I interjected saying that that wasn't very nice and asked my father if we should call someone else, he became irate, yelled at me for saying something, said i ?should mind my business? in my own home, raised his voice loud enough to startle my infant and made him cry, said he ?should have pushed us down the stairs?, and stormed out of the house like a disgruntled prima-donna. The whole situation left me and my baby rattled. This man thinks that the demand for his trade entitles him to speak down to and mistreat customers.Go elsewhere."

amy m on April 2025

Avatar for Abstract Plumbing, Heating and A/C

Abstract Plumbing, Heating and A/C

4.81(
35
)
•Approved Pro

Abstract Plumbing, Heating and A/C

4.81(
35
)
•Approved Pro
Customers say: Quality work
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
17 years of experience

Abstract Plumbing, Heating and Air Conditioning is a locally owned and operated business. We take pride in every job we do and guarantee 100% customer satisfaction. Call now for a free estimate. 631-698-9600

"Everything went according to schedule. Work was neat and completed on time. Would do business with abstract again."

Tony F on February 2022

Abstract Plumbing, Heating and Air Conditioning is a locally owned and operated business. We take pride in every job we do and guarantee 100% customer satisfaction. Call now for a free estimate. 631-698-9600

"Everything went according to schedule. Work was neat and completed on time. Would do business with abstract again."

Tony F on February 2022

Avatar for Elm Air Conditioning Corp

Elm Air Conditioning Corp

4.40(
77
)
•Approved Pro

Elm Air Conditioning Corp

4.40(
77
)
•Approved Pro
Customers say: Super punctual
74 local quotes requested
73 years of experience

We prioritize your comfort and satisfaction above all else. With over 70 years of industry experience and a dedicated team of professionals, we offer reliable HVAC solutions tailored to meet your specific needs. Our commitment to quality craftmanship ensures that your system operates efficiently and effectively, saving you money in the long run. Whether you need installation, maintenance, or repairs, you can trust us to keep your home comfortable year-round. A consumer looking to make an investment in their home normally solicits bids from a number of contractors, especially when they’re considering a large purchase, like a new furnace or air conditioner. More often than not, it’s the shop that provides the lowest reasonable price that wins the job. But is that really the way to think when making a purchase on something as important as a new heating and cooling system? Lower priced equipment usually means lower quality and it may not have a long, efficient life-cycle and could end up costing you more in utility bills. Elm Air Conditioning is a full-service residential and light commercial HVAC company based in Freeport, New York, serving Nassau, Suffolk, and the East End of Long Island. The company has been a trusted regional leader for more than 70 years, known for its blend of traditional craftsmanship and modern energy-efficient solutions.

"They installed a new air handler and compressor,my old system,also installed by them,18 years ago,had some serious repair issues. i have dealt with them for 18 years,with maintenance and checkups,have always been tyreated with courtesy,respect and top notch serice,the team that came yesterday,was prepared,knowledgeable and took extra care to not damge my home.very satisfied with the crew,installation...and never in my 80 yeras have so many nice young man,called me sir."

Michael P on May 2024

We prioritize your comfort and satisfaction above all else. With over 70 years of industry experience and a dedicated team of professionals, we offer reliable HVAC solutions tailored to meet your specific needs. Our commitment to quality craftmanship ensures that your system operates efficiently and effectively, saving you money in the long run. Whether you need installation, maintenance, or repairs, you can trust us to keep your home comfortable year-round. A consumer looking to make an investment in their home normally solicits bids from a number of contractors, especially when they’re considering a large purchase, like a new furnace or air conditioner. More often than not, it’s the shop that provides the lowest reasonable price that wins the job. But is that really the way to think when making a purchase on something as important as a new heating and cooling system? Lower priced equipment usually means lower quality and it may not have a long, efficient life-cycle and could end up costing you more in utility bills. Elm Air Conditioning is a full-service residential and light commercial HVAC company based in Freeport, New York, serving Nassau, Suffolk, and the East End of Long Island. The company has been a trusted regional leader for more than 70 years, known for its blend of traditional craftsmanship and modern energy-efficient solutions.

"They installed a new air handler and compressor,my old system,also installed by them,18 years ago,had some serious repair issues. i have dealt with them for 18 years,with maintenance and checkups,have always been tyreated with courtesy,respect and top notch serice,the team that came yesterday,was prepared,knowledgeable and took extra care to not damge my home.very satisfied with the crew,installation...and never in my 80 yeras have so many nice young man,called me sir."

Michael P on May 2024

Airtech LLC

5.00(
1
)

Airtech LLC

5.00(
1
)
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

Airtech LLC has been servicing the New Jersey counties of Warren, Morris, and Essex for fifteen years in the HVAC field. Our goal is to provide 100% customer satisfaction at affordable rates. Airtech LLC prides itself with high standards and professional service including customized installations and replacements by qualified mechanics certified by the Eastern Heating and Cooling Council. Airtech LLC services all makes and models providing 24 hour emergency repairs. Airtech LLC will provide referral upon request and extend discounts to seniors and veterans.

"The HVAC in our new home has been problematic since day one until finally the heat pump quit. We called Airtech and they came in and identified the problem. Basically we had an over powered system with too many zones for the square footage and size of ductwork in the home. They installed a new heat pump, removed our electric backup heat and zones then coupled our heat pump to propane heat as the back up. Works like a champ now! Knowledgeable and easy to deal with."

Mark H on May 2018

Airtech LLC has been servicing the New Jersey counties of Warren, Morris, and Essex for fifteen years in the HVAC field. Our goal is to provide 100% customer satisfaction at affordable rates. Airtech LLC prides itself with high standards and professional service including customized installations and replacements by qualified mechanics certified by the Eastern Heating and Cooling Council. Airtech LLC services all makes and models providing 24 hour emergency repairs. Airtech LLC will provide referral upon request and extend discounts to seniors and veterans.

"The HVAC in our new home has been problematic since day one until finally the heat pump quit. We called Airtech and they came in and identified the problem. Basically we had an over powered system with too many zones for the square footage and size of ductwork in the home. They installed a new heat pump, removed our electric backup heat and zones then coupled our heat pump to propane heat as the back up. Works like a champ now! Knowledgeable and easy to deal with."

Mark H on May 2018

...
Showing 1-10 of 1008

FAQs for furnace / forced air heating system install or replace projects in West Islip, NY

Pinpointing an HVAC problem often involves several components, heavy equipment, and high-voltage conditions best left to a licensed technician. Instead of guessing, hire a pro who can diagnose the issue and repair it safely. When requesting estimates from HVAC repair companies near you, share detailed notes about the symptoms, ask what the visit covers, and compare at least two or three quotes before making a decision.

With proper upkeep, most HVAC systems last 15 to 25 years. Annual inspections, filter changes, and coil cleanings help ease the strain on key parts and prevent major breakdowns. Staying on a regular maintenance schedule also protects efficiency and indoor air quality, resulting in lower energy bills and fewer unexpected repairs. In short, plan on at least one professional tune-up each year if you want your system to hit that two-decade mark.

Most manufacturers recommend professional service at least once a year, and twice a year if you own a heat pump system that handles both heating and cooling. These tune-ups let a technician test safety controls, check refrigerant levels, and clean components before minor issues snowball into expensive repairs. Sticking to that schedule keeps warranties valid, boosts efficiency, and can extend the system’s lifespan by several years.

Installing a new HVAC system averages $7,500, but the exact figure hinges on the type of equipment you choose and the size of your home. Swapping out just the AC runs roughly $2,200 to $5,500, while a furnace replacement ranges from $3,200 to $6,000. Although that outlay is significant, newer units deliver better performance and energy savings, so you’ll start earning some of the money back on your utility bills.

Expect to spend between $450 and $2,000 to repair existing ductwork, or between $1,200 and $4,500 for a full replacement. More minor fixes—such as patching leaks, adding insulation, or replacing a damaged vent—cost between $200 and $700. Healthy ducts are crucial to proper airflow, so addressing issues promptly helps your HVAC system run efficiently, keeps energy bills in check, and maintains optimal indoor air quality.

The West Islip, NY homeowners’ guide to furnace / forced air heating system installs or replaces

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

See all articles