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Best heating and air conditioning pros near West Islip, NY

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TRUSTED BY WEST ISLIP, NY HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon461
    Verified heating and air conditioning services reviews

Top-Rated Heating and air conditioning pros in West Islip - Updated Nov 2026

Avatar for MSD Heating & Cooling
MSD Heating & Cooling
4.9(
74
)
Central A/C - InstallBoiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For Business+47 more

Serving West Islip, NY and surrounding areas

Approved

In business since 2002

Free estimates

Emergency services offered

"Can't speak highly enough of Ali. Prompt, courteous, but most importantly able to get to the bottom of problem without ripping off the customer. AN HONEST MAN! After many years of searching, I've finally found an HVAC repair company that I can trust! Happy days are hear again."
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+1

2 neighbors recently requested a quote
Recommended by96%of homeowners
Just Rite Heating and Cooling
4.9(
132
)
Central A/C - InstallDuctless Mini-split A/C - Install or ReplaceHeat Pump - Install or Replace+6 more

Serving West Islip, NY and surrounding areas

Approved

In business since 1995

Free estimates

Credit card accepted

"I am not a review writer at all, however, I felt it only fair to write a review for Eric and Just Rite HVAC after a wonderful experience. This company and Eric the owner are, in a word, the BEST! I needed main floorâ s central AC replaced. A friend recommended me to Eric. I texted him and he responded with a few hours. setting up an appointment was fast and easy. Eric was knowledgeable and timely. My job was extremely difficult based on the location of my air handler and there was a high chance the ceiling would need to be opened for access. When Eric arrived for the job he inspected further and said he was going to try not to have to open the ceiling for access. He and his crew went well beyond what anybody else would have done and meticulously dismantled the old air handler piece by piece. It was time consuming, difficult and energy consuming. But they were able to do and saved me from having a gaping hole in my ceiling. They did an excellent job setting up the new air handler in the same location and even fixed errors the previous installer had made! The entire crew were highly professional, courteous and clean. They put down drop cloths everywhere and cleaned up everything when they were done. I highly, highly, and without reservation, recommend Eric and Just Rite HVAC and will tell anybody I know about them."
Response time5 hrs
4 neighbors recently requested a quote
Recommended by97%of homeowners
New York HVAC Corporation
4.3(
60
)
Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace+20 more

Serving West Islip, NY and surrounding areas

Approved

In business since 2012

Free estimates

Customers say: Quality work

"I was in need of boiler repairs. Most plumbing companies I contacted wanted to charge by the hour plus parts. I found NY HVAC on Home advisor and phoned them speaking with Vinny. Vinny from NY HVAC was a true professional. He told me over the phone that I would get great work at the price he quoted. When he arrived, he explained everything in detail that should be done to my boiler and maintained the original quote he had given me over the phone even though he was adding in additional repairs for me. Just an overall nice guy and very clean work. It's tough to find an honest plumber that does great work and today I found one. I have already placed New York HVAC phone number in my phone as my go-to Plumbing company. There is a reason this company has solid reviews and I'm adding a 5 STAR to this review and will share my positive experience with friends and family looking for a great Plumbing Company."
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 HVAC
 HVAC
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 HVAC

+54

Response time1 day
1 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Patience HVAC, LLC
Patience HVAC, LLC
4.9(
30
)
Central A/C - InstallCentral A/C - Service or RepairCentral Air Cleaner - Repair or Service+35 more

Serving West Islip, NY and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"Let me just say that I am so lucky to find a Hvac company like Anthony's. I had 3 other contractors say my gas boiler needs to be replaced without really inspecting what was wrong. I found Patience hvac Inc when I was about to lose hope. He is super fair and through, went over explanations of each parts replacement needed, did maintenance clean up of boiler and extra miles on my 30 years old boile now it is back life just like new. I am really thankful to Anthony. He is quick, prompt, sincere and humble. Trust me call this guy, You will save lots of money and headache."
Peerless
Peerless Boiler with Hot Water
Annual Service
Response time4 hrs
Recommended by100%of homeowners
Avatar for Deer Park Ave Heating & Air Conditioning Corporation
Deer Park Ave Heating & Air Conditioning Corporation
4.4(
55
)
Central A/C - InstallCentral A/C - Service or RepairDuctless Mini-split A/C - Install or Replace+7 more

Serving West Islip, NY and surrounding areas

Approved

In business since 2012

Free estimates

Emergency services offered

"Mr. Brunetto and his team was very professional and prompt. We had an issue with our furnace in which they came in the following day to evaluate the issue. They were able to see the problem and give us a solution to solve this issue the same day. They came back the following day to repair and was complete finished within hours. We were impressed with the professionalism, promptness and kindness of the company. Excellent overall and I would recommend."
Work
Work
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+188

Recommended by92%of homeowners
Avatar for N. H. Ross, Inc.
N. H. Ross, Inc.
4.7(
191
)
Central A/C - InstallDuctless Mini-split A/C - Install or ReplaceGas Boiler or Radiator Heating System - Install+2 more

Serving West Islip, NY and surrounding areas

Approved

Super Service Award Winner

In business since 1976

Warranties offered

Small jobs welcome

"A great company to deal with. Regardless of what problem you may have, they have technicians and repair men that will rake care of it. From electric to plumbing, AC/ heat. Great to have one place to call for everything. They are all so proffesional and friendly. I appreciate them using shoe covers when entering your home and the sales people are not pushy. Two things that always bug me. ! They state the facts. They are honest, the prices are fair, And they will give you options. I highly recommend them."
Bathroom Makeover
Bosch Combination Boiler
Gas Conversion
Rinnai Gas Combi Boiler
Old conventional gas boiler

+2

Response time30 mins
3 neighbors recently requested a quote
Recommended by89%of homeowners
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Showing 1-10 of 854
Heating and Air Conditioning FAQs, answered by experts

No, it's not advisable to only replace the outside AC unit connected to your system. AC units are designed to work as a cohesive system, and older units work differently than newer units. Therefore, replacing only one component can lead to incompatibilities that affect the system’s performance. Replacing one component can void your warranty, costing you money for repairs.

No, for two very important reasons. First, it’s illegal to release refrigerant into the air or ground since it can be toxic and cause environmental damage. Technicians typically pump old or extra refrigerant into separate tanks for special disposal. Second, without professional equipment to read refrigerant pressure and levels, plus the AC’s suggested requirements, it’s impossible to know if you’ve removed the right amount of refrigerant. Stay away from a DIY solution here and seek an expert with the right tools.

Indications of an HVAC problem include inconsistent heating or cooling throughout your home, unpredictable temperature changes, or inadequate air flow from vents. Abnormal sounds such as grinding, banging, or hissing, and unpleasant smells like mustiness or burning are also potential warning signs. A rise in energy costs without an increase in usage may also imply decreased efficiency. An HVAC system that frequently cycles on and off or cannot maintain a stable temperature is malfunctioning.

If you’re shopping around for a rooftop AC unit, you may hear them referred to as “package units.” That’s because rooftop AC systems are all-in-one heating and cooling units that connect directly to your home’s ductwork. If your AC repair pro references a package unit, they are referring to the system on your roof.

The best way to compare HVAC quotes is getting a few detailed quotes from local companies with good reputations. Then, go over the quotes line by line. Protect yourself by insisting on in-person estimates that include equipment manufacturer names, model numbers, SEER ratings, amounts and numbers of materials, details of warranties on equipment and labor, and other specifics. 

Knowing the exact equipment and materials is the only way that you can fairly compare quotes. Quotes that are much lower than others can be a sign that the company isn’t providing the best quality service or materials.

The West Islip, NY 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.