Comfort You Can Trust.
Limitless Options. One Company.
Comprehensive HVAC Solutions
Air Conditioning Repair
Fast, reliable AC repair services to keep your home cool and comfortable.
Air Conditioning Installation
New central air systems sized to your home with a Manual J load calculation.
Heating Repair
24/7 furnace and boiler repair for gas and oil systems across Long Island.
Heating Installation
Professional installation of high-efficiency heating systems for long-lasting warmth.
Ductless Mini-Split Installation
Single and multi-zone cold-climate mini-splits for additions, attics and homes without ducts.
Heat Pumps
Ducted and ductless cold-climate heat pumps that heat and cool your whole home.
Cost Estimator
- Instant price ranges for different systems
- Customized for your home size
- No commitment required
HVAC Instant Cost Estimate Tool
Why Choose K2
Licensed & Insured
Fully certified technicians you can trust in your home.
24/7 Emergency
We are here when you need us most, day or night.
Expert Repairs
We fix it right the first time, every time.
Fair Pricing
Transparent quotes with no hidden fees.
Special Offers
Limited Time Savings
5% Off All Services (New Clients Only)
Special offer for new clients: Get 5% off on all heating, air conditioning, and indoor air quality services across Long Island.
Valid until: Dec 31, 2026
Refer a friend, get $50 off on your next service
Refer a friend or neighbor to K2 and receive a $50 discount on your next HVAC repair or maintenance service.
Valid until: Dec 31, 2026
$250 off new Installation
Save $250 on any new high-efficiency central air conditioning, heat pump, furnace, or boiler installation.
Valid until: Dec 31, 2026
24/7 Emergency Service
Our technicians are standing by to help restore your comfort.
Areas We Serve
Dispatched 24/7 directly from our central headquarters at 60 S 2nd St V, Deer Park, NY. We proudly serve every community within a 15-mile radius across Suffolk and Nassau counties.
Testimonials
"K2 relocated my thermostat. Great service and polite staff. Fast, efficient, and very neat installation!"
Stacy Seecharan
Verified Homeowner"This was my first time using K2 Cooling & Heating, and I could not be happier with the experience. Waseem arrived on the scheduled day right on time and took the time to listen carefully to the issues I was having with my HVAC unit before beginning any work. He quickly diagnosed the problem and explained everything clearly in a way that was easy to understand. His professionalism, knowledge, and attention to detail were outstanding."
Shahid Ali
Verified Homeowner"This is my second (distinct) job with K2 HVAC and I could not be more appreciative of their prompt and quality services. The first job (a replacement of my heating unit) was handled excellently by Shelby and the second (a replacement of my hot water unit) was amazingly handled by Waseem. The backend customer support is fantastic too, as Sadia is ever responsive by text and phone call. All said, I recommend their services wholeheartedly!"
tobi bell
Verified Homeowner"Waseem is excellent. He checked my heating system, diagnosed the problem and fixed the whole system. Now the heat is working excellently. I am highly recommending this company to any person house. He is very thorough and spent as much as was needed to repair the heat. We are very thankful. He is excellent. Thank you so much to your company."
Tamara Shashiashvili
Verified Homeowner"Nice company, good experience, nice people and nice workers. Very respectful technicians who treat your home with care."
Mevlut Cil
Verified Homeowner"Great customer service, fair prices and good work. Will definitely be using again!"
Ariba Hashmi
Verified Homeowner"K2 relocated my thermostat. Great service and polite staff. Fast, efficient, and very neat installation!"
Stacy Seecharan
Verified Homeowner"This was my first time using K2 Cooling & Heating, and I could not be happier with the experience. Waseem arrived on the scheduled day right on time and took the time to listen carefully to the issues I was having with my HVAC unit before beginning any work. He quickly diagnosed the problem and explained everything clearly in a way that was easy to understand. His professionalism, knowledge, and attention to detail were outstanding."
Shahid Ali
Verified Homeowner"This is my second (distinct) job with K2 HVAC and I could not be more appreciative of their prompt and quality services. The first job (a replacement of my heating unit) was handled excellently by Shelby and the second (a replacement of my hot water unit) was amazingly handled by Waseem. The backend customer support is fantastic too, as Sadia is ever responsive by text and phone call. All said, I recommend their services wholeheartedly!"
tobi bell
Verified Homeowner"Waseem is excellent. He checked my heating system, diagnosed the problem and fixed the whole system. Now the heat is working excellently. I am highly recommending this company to any person house. He is very thorough and spent as much as was needed to repair the heat. We are very thankful. He is excellent. Thank you so much to your company."
Tamara Shashiashvili
Verified Homeowner"Nice company, good experience, nice people and nice workers. Very respectful technicians who treat your home with care."
Mevlut Cil
Verified Homeowner"Great customer service, fair prices and good work. Will definitely be using again!"
Ariba Hashmi
Verified Homeowner"K2 relocated my thermostat. Great service and polite staff. Fast, efficient, and very neat installation!"
Stacy Seecharan
Verified Homeowner"This was my first time using K2 Cooling & Heating, and I could not be happier with the experience. Waseem arrived on the scheduled day right on time and took the time to listen carefully to the issues I was having with my HVAC unit before beginning any work. He quickly diagnosed the problem and explained everything clearly in a way that was easy to understand. His professionalism, knowledge, and attention to detail were outstanding."
Shahid Ali
Verified Homeowner"This is my second (distinct) job with K2 HVAC and I could not be more appreciative of their prompt and quality services. The first job (a replacement of my heating unit) was handled excellently by Shelby and the second (a replacement of my hot water unit) was amazingly handled by Waseem. The backend customer support is fantastic too, as Sadia is ever responsive by text and phone call. All said, I recommend their services wholeheartedly!"
tobi bell
Verified Homeowner"Waseem is excellent. He checked my heating system, diagnosed the problem and fixed the whole system. Now the heat is working excellently. I am highly recommending this company to any person house. He is very thorough and spent as much as was needed to repair the heat. We are very thankful. He is excellent. Thank you so much to your company."
Tamara Shashiashvili
Verified Homeowner"Nice company, good experience, nice people and nice workers. Very respectful technicians who treat your home with care."
Mevlut Cil
Verified Homeowner"Great customer service, fair prices and good work. Will definitely be using again!"
Ariba Hashmi
Verified HomeownerTrusted Brands We Work With
Latest HVAC News
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Frequently Asked Questions
What HVAC services does K2 Cooling & Heating provide across Long Island?
K2 Cooling & Heating provides complete heating, ventilation, and air conditioning solutions, including 24/7 emergency AC repair, high-efficiency heat pump and ductless mini-split installations, natural gas and oil furnace diagnostics, hydronic boiler repairs, commercial RTU mechanical service, and annual preventative tune-ups.
How quickly can K2 dispatch an emergency technician to my Long Island home?
We answer 24/7 and dispatch from our shop at 60 S 2nd St V in Deer Park to homes within 15 miles. For urgent heating and cooling problems we send the nearest available technician and give you an arrival window when you call (631) 414-7141; most of our service area is a short drive from the shop.
What communities are included in K2's primary 15-mile service radius?
Our core 15-mile radius encompasses Western Suffolk County (Deer Park, Babylon, Huntington, Islip, and Smithtown townships) and Eastern Nassau County (Farmingdale, Massapequa, Plainview, Levittown, Hicksville, and surrounding hamlets).
Are your technicians licensed, certified, and insured in New York?
Yes. K2 Mechanical Corp. is fully licensed, insured, and bonded. All technicians are EPA Section 608 certified and factory-trained on major heating and cooling equipment including Carrier, Mitsubishi Electric, Daikin, Bosch, Trane, and Rheem.
What rebates and financing options are available for new HVAC systems?
Financing is available through Rheem KwikComfort (credit provided by Synchrony Bank), subject to credit approval. Qualifying cold-climate heat pumps may also be eligible for PSEG Long Island Clean Heat rebates. Rebates are applied for through PSEG Long Island, and amounts and eligibility change, so confirm current terms at psegliny.com.