Our Services
Expert HVAC solutions.
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!
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
Air Conditioning Installation
High-SEER2 central cooling systems sized with ACCA Manual J load calculations for balanced comfort, matched to your existing ductwork and electrical service.
- Precision Manual J Sizing
- Ductwork Checked Before Sizing
- 10-Year Warranty Coverage
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
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
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, and a common replacement for aging oil boilers.
- Heats Down to -13°F
- Heats and Cools in One System
- Independent Multi-Zone Comfort
Ductless Mini-Split Installation
Single-zone and multi-zone cold-climate mini-splits for additions, finished attics, garages, sunrooms and homes that have never had ductwork. Heating and cooling with room-by-room control.
- Single & Multi-Zone Systems
- No Ductwork Required
- Cold-Climate Heat Pumps
Indoor Air Quality
Media air cleaners, whole-home humidifiers and dehumidifiers, UV systems and duct sealing for Long Island homes dealing with dust, allergies, musty odors or dry winter air.
- Whole-Home Filtration
- Humidity Control
- Duct Sealing
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
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. Qualifying cold-climate heat pumps may 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.
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.
Cold-Climate Heat Pumps
Sized for Long Island winters. PSEG Long Island Clean Heat rebates are applied for through PSEG Long Island; K2 does not file them.
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.
Still have questions?Chat with our support team
Don't See What You're Looking For?
K2 Mechanical provides custom solutions for complex cooling and heating projects. Contact our specialists for a tailored consultation.