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Best heating and air conditioning pros near Syosset, NY

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  • Average homeowner rating star icon4.4
    Average homeowner rating
  • Verified reviews icon431
    Verified heating and air conditioning services reviews

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

Avatar for AR AIR CORP
AR AIR CORP
4.9(
85
)
Central A/C - InstallElectric Furnace / Forced Air Heating System - InstallBoiler or Radiator Heating System - Install or Replace+31 more

Serving Syosset, NY and surrounding areas

Approved

Super Service Award Winner

In business since 1999

Free estimates

Emergency services offered

"Rafael is an amazing HVAC technician. I have been using him exclusively in both of my businesses and my personal home. He won me over when he came in the middle of zero degree weather to service my heat as it broke that day. I work with children so that was very important to have. He was the only one to answer and come right away. I have used him for over several years. As I write this he also just serviced my unit today for the AC. Couldn’t say enough good things about him!"
Heating and Air Conditioning Project
Heating and Air Conditioning Project
Heating and Air Conditioning Project
Heating & A/C Project
Installation of Merv13 Pleated filters I’m order to comply with State regulations.

+173

Response time9 hrs
Response rate100%
6 neighbors recently requested a quote
Avatar for K.N. Heating and Cooling
K.N. Heating and Cooling
4.8(
353
)
Oil Boiler or Radiator Heating System - RepairCentral A/C - InstallDuctless Mini-split A/C - Install or Replace+1 more

Serving Syosset, NY and surrounding areas

Approved

In business since 2009

Free estimates

Emergency services offered

"My a/c circuit breaker kept tripping upon start-up of the unit. I read the positive reviews about KN, so I requested a quote and Kevin responded with a text within an hour. He was even able to come the same day and spent 2 hours to thoroughly inspect and test the various components of the system (including the connector in my attic), and replace the hard start. Kevin was very professional and thoroughly explained how the system functions and what he was doing each step of the way, which I really appreciated. I would highly recommend Kevin for your HVAC needs!"
a/c change out
steam oil boiler replacement
steam oil boiler replacement
indirect hot water heater
indirect hot water heater

+13

Response time2 hrs
3 neighbors recently requested a quote
Recommended by96%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 Syosset, NY and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"The team of Patience HVAC, Anthony who scheduled the appointment to Cesar the technician were great. They accommodated schedules . Did excellent work, Cesar spent his time with his tools for diagnostics , and then made recommendations. He spent the time needed to do the work , never in a rush . He interacted professionally with us . They are a gem , and the name says it all. They are patient, with clients, patient with there work . I highly recommend them . Rohit Verma"
Peerless
Peerless Boiler with Hot Water
Annual Service
Response time4 hrs
Recommended by100%of homeowners
Avatar for MassAir
MassAir
4.9(
64
)
Central A/C - InstallDuctless Mini-split A/C - Install or ReplaceGas Furnace / Forced Air Heating System - Install+11 more

Serving Syosset, NY and surrounding areas

Approved

In business since 2007

Free estimates

Warranties offered

"Joe and his crew did excellent work, they were very professional and clean. The job was completed when promised and the owner was on the job site for the whole project. The cost of the central air conditioning system was very reasonable. We were very satisfied with the whole install and would definitely use them again."
Furnace
Ductless mini-split
Air Handler
Condenser
Condenser

+9

Response time3 hrs
14 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Arvada Mechanical Corp.
Arvada Mechanical Corp.
4.8(
18
)
Boiler or Radiator Heating System - Install or ReplaceBoiler or Radiator Heating System - Install or Replace - For BusinessBoiler or Radiator Heating System - Repair or Service+39 more

Serving Syosset, NY and surrounding areas

Approved

In business since 2010

Free estimates

Emergency services offered

"This Company is top notch! They quickly responded to my urgent message in regard to no heat in the house and had the service guy arrive to the door right after completing another job. They were very professional and did the repair in no time and price quoted over the phone was exactly what was charged for the service. We will definitely call this Company again for any boiler repairs. Thank you!"
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+4

Response time8 hrs
Recommended by87%of homeowners
Avatar for AC Air Duct Cleaning
AC Air Duct Cleaning
5.0(
30
)
Air Ducts & Vents - Clean

Serving Syosset, NY and surrounding areas

Approved

Super Service Award Winner

In business since 2020

Free estimates

Emergency services offered

"The assigned technician, John, was on-time, knowledgeable, provided suggestions, and thorough. Oftentimes, people don’t realize how important this service is. If I were you, I would book AC Air Duct cleaning!"
Additional Photos
Additional Photos
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Additional Photos
Additional Photos

+29

Response time7 hrs
Response rate100%
2 neighbors recently requested a quote
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Heating and Air Conditioning FAQs, answered by experts

As mentioned above, not all HVAC Schrader valves are necessarily the same. While the valve core and pin or spring size on Schrader valves used for HVAC are generally similar, the valves are not all universal and interchangeable. The size of Schrader valves varies depending on whether it's used in an air conditioner, bicycle tire, or motor vehicle tire.

DIY is possible for basic cleaning. Professional services handle advanced maintenance like recharging the refrigerant.

They can, but it’s not as common. Window AC units are much smaller than whole-house systems and less likely to develop refrigerant leaks or similar issues. As a result, you will rarely need to add a new refrigerant, limiting overcharging problems. However, it’s still important to leave refrigerant management in the hands of professionals when window units need work.

Yes, but they don’t feel the same as an AC-cooled room. You’ll feel cool, moist air, opposite from an HVAC system that dries the air as it cools. Ventless units also have less tonnage than alternatives like ductless and central air, which means they aren’t as capable of quickly cooling large spaces or circulating cold air.

For the most part, you should leave your AC fan in “auto” mode so that it only runs during a heating or cooling cycle. Keeping it in this position uses less energy, which equals lower utility bills. However, there are some situations where it’s better to leave your AC fan on, including if you have allergies or there are lots of people in your home.

The Syosset, 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.