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K2
COOLINGAND HEATING
Residential & Commercial Mechanical Contractors

Our Services

Expert HVAC solutions.

New Client SpecialValid through Dec 31, 2026

5% OFF On All Services

First time calling K2? Receive an exclusive 5% discount on all heating, air conditioning, and indoor air quality services with coupon code NEWCLIENT5. Also ask about SAVE250 for $250 off new HVAC installations. Refer a friend with REFER50 for referral credits!

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Air Conditioning Repair

Air Conditioning Repair

Fast 24/7 diagnostic and repair services across Long Island. We resolve frozen coils, electrical failures, refrigerant leaks, and compressor breakdowns on all major makes and models.

  • 24/7 Emergency Dispatch
  • All Makes & Models Serviced
  • Upfront Flat-Rate Pricing
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Air Conditioning Installation

Air Conditioning Installation

High-SEER2 central cooling systems sized with ACCA Manual J engineering calculations for balanced indoor comfort. Eligible for thousands in PSEG Long Island Clean Heat utility rebates.

  • Precision Manual J Sizing
  • PSEG Rebates Available
  • 10-Year Warranty Coverage
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Heating Repair & Emergency Service

Heating Repair & Emergency Service

Rapid emergency heating diagnostics and repairs for gas furnaces, hydronic boilers, and steam systems across Nassau and Suffolk. Certified combustion safety and carbon monoxide testing on every call.

  • Furnace & Boiler Specialists
  • Emergency Winter Response
  • Certified Combustion Testing
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Heating Installation & Boiler Replacement

Heating Installation & Boiler Replacement

Ultra-efficient condensing gas furnaces and wall-hung combi boilers achieving up to 98% AFUE. Turnkey oil-to-gas conversions with custom near-boiler hydraulic looping.

  • Up to 98% AFUE Efficiency
  • Oil-to-Gas Conversions
  • Near-Boiler Piping Mastery
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Heat Pumps & Ductless Mini-Splits

Heat Pumps & Ductless Mini-Splits

All-in-one year-round heating and cooling engineered for freezing cold climates down to -13°F. Multi-zone independent room controls with PSEG Long Island Clean Heat rebate assistance.

  • Heats Down to -13°F
  • PSEG Clean Heat Rebates up to $7,500
  • Independent Multi-Zone Comfort
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Commercial HVAC Installation & Service

Commercial HVAC Installation & Service

Industrial-grade rooftop packaged units (RTU), custom curb adaptations, crane rigging, and customized preventative maintenance agreements for facilities across Long Island.

  • 2 to 50+ Ton RTU Packages
  • Custom Maintenance Contracts
  • 24/7 Priority Emergency Service
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Long Island Mechanical Excellence

Engineered Cooling & Heating for Long Island's Coastal Climate

Operating heating, ventilation, and air conditioning equipment on Long Island presents unique challenges that generic contractors often overlook. Surrounded by the Atlantic Ocean, Long Island Sound, and the Great South Bay, our homes and commercial facilities endure intense summer humidity waves that demand superior latent moisture removal, paired with harsh coastal nor’easters and sub-freezing winter cold snaps. Moreover, airborne salt spray accelerates galvanic corrosion on outdoor aluminum condenser fins and copper piping, shortening the lifespan of poorly protected equipment.

At K2 Cooling & Heating, our certified mechanical technicians specialize in systems engineered specifically for Long Island properties. Centrally dispatched from our modern operations hub at 60 S 2nd St V in Deer Park, NY, we provide rapid, licensed service across both Suffolk County and Nassau County. From post-war Cape Cod and split-level homes requiring multi-zone ductless mini-split retrofits to center-hall Colonials and commercial retail strip centers, we provide custom-sized installations and precision diagnostics that guarantee balanced, whisper-quiet indoor comfort year-round.

Every service call and installation we perform adheres to rigorous mechanical standards. We calculate exact thermal heating and cooling loads utilizing ACCA Manual J methodologies rather than relying on outdated rules of thumb, preventing premature compressor wear and short-cycling. As an approved PSEG Long Island Clean Heat Participating Contractor, we help local homeowners unlock PSEG Long Island Clean Heat rebates — currently up to $4,000 at market rate and up to $7,500 for income-qualified households. Amounts are set by PSEG and change over time.

Whether you need urgent 24/7 emergency air conditioning repair on a ninety-degree August weekend, a comprehensive seasonal furnace tune-up, or a full commercial rooftop packaged unit replacement with custom curb adapters and crane rigging, K2 Cooling & Heating is your dedicated pair of hands. We stand behind every job with upfront flat-rate pricing, transparent diagnostic reporting, zero hidden travel fees, and comprehensive 10-year warranty options.

24/7 Fast Dispatch

Centrally based in Deer Park for 45–90 min emergency arrival across Long Island.

Licensed & EPA Certified

Master mechanical contractors with comprehensive county and municipal licensing.

PSEG Clean Heat Partner

Instant point-of-sale utility rebates up to $7,500 filed directly on your behalf.

Upfront Flat-Rate Pricing

Straightforward quotes before work begins with zero overtime or travel surcharges.

Frequently Asked Questions

Have questions about your HVAC system? Explore our common inquiries or reach out for personalized expert advice.

In spring and fall, schedule HVAC system maintenance to prepare for temperature changes. Our personnel can inspect and clean vents to ensure heating and cooling components are safe.
Change most air filters every 30 to 60 days, but if your home has a lot of pet hair and other allergens, change them more often.
Indoor air quality affects house air temperature, humidity, freshness, and purity. Having your home’s IAQ checked on each service visit is critical for safety since bad or wet air can have long-term health consequences.
Programmable thermostats conserve energy by controlling temperature during work, school, and vacation hours.
An increasingly common cooling solution for houses without central air ducts is the ductless mini-splitter. The “split” system operates without the need for ducting by drawing air in, cooling it, and then venting it back out. It consists of one large unit mounted outside and one or more smaller units mounted on a wall inside.
A malfunctioning meter or faulty wiring may be the culprit. If your electricity prices keep rising despite your best efforts, consult a licenced electrician.
Never run your air conditioner if it is frozen. You can turn off the breaker switch in your home, manage the AC to allow the coils to thaw, and then contact the air conditioning specialists at BC Express. We’ll assist you in defrosting and drying the coils thoroughly so they may be used safely.
If your air conditioner makes weird noises, contact our specialists for an assessment. We’ll fix the noise, saving you time and trouble. DIY repairs without training could do more damage.
A furnace that is properly maintained has a lifespan of ten years. During a maintenance visit, our professionals may assess the age and maintenance history of your furnace and provide recommendations.
Yes. One notable distinction is that gas is directly provided to your residence whenever it is required, whereas oil boilers require you to purchase and store oil for refills. In areas without access to public gas, oil may be a more suitable alternative
Stoves and furnaces use gas, making them risky. Maintaining your furnace regularly protects your warranty and decreases fire danger.
Instead of 15–20 years like household HVAC systems, commercial HVAC systems might last 25 years or more. Avoid surprises and costs while updating your HVAC system by planning ahead.
Most indoor air quality issues are caused by pollution sources that release gases or particles. Indoor pollutant levels grow when ventilation is insufficient to remove interior air pollutants or bring in enough outside air to offset indoor source emissions.
Regular AC maintenance can tell you when repairing it is more expensive than buying a new one. With proper upkeep, you can even enjoy lower energy expenses. Thus, it’s wise to arrange a tune-up and think about a new system if you’re experiencing a surge in your electricity bills or your AC is no longer able to keep you comfy.
A. The following are the things that you should do immediately: • Please disconnect the HVAC system • Call our helpline immediately. • If you’re not qualified, don’t fix anything yourself—you could make things worse.
A reliable Long Island HVAC service is quite important to find. You can find it by • Online Directories • Consumer Evaluations • Word-of-mouth recommendations are good places to start.
The services that we provide in Deer Park and Long Island are: • Installation • Maintenance • Repairs and emergency services for HVAC systems
HVAC maintenance costs depend on its breadth. If you just need a cleaning and air filter, $100 is acceptable. Long Island parts and labour expenses are greater if you need to repair or replace a broken part.

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