HVAC Installation & Replacement
in Long Island, NY
HVAC Installation & Replacement in Long Island. Expert HVAC installation & full system replacement across Nassau & Suffolk. Call ART HVAC for a free quote.
24/7 Emergency Service
Con Edison Rebates
5.0 Google & Yelp
Up to 12-Year Warranty
Long Island HVAC Replacement Is a Bigger Decision Than It Looks more than you think
Larger Long Island homes mean bigger systems, higher costs, and more at stake if the installation is sized wrong, permitted incorrectly, or finished with equipment that does not match the house.
Town permits stall the job
Nassau and Suffolk towns each have their own permit rules, so a quick install can stall waiting on a town inspector.
Big homes are hard to size
A ranch and a colonial in the same town need different systems, and an eyeballed load leaves rooms that never feel right.
A serious money decision
A full Long Island system can top $15k, so the payment, the rate, and year-two service deserve careful answers first.
Will it add resale value?
A new system helps your sale only if it was properly permitted and there's paperwork a buyer's inspector can verify.
OUR SERVICES
Long Island HVAC, Properly Sized
Nassau and Suffolk homeowners trust us for HVAC installs that clear local town permits, meet efficiency standards, and handle every step of the process.
Commercial HVAC Installation
Offices, Retail & Multi-Unit
Long Island commercial buildings in Nassau and Suffolk face town-specific permit requirements on top of state codes. We navigate local approvals, handle load calculations, and install commercial systems built to last in the region.
Residential HVAC Installation
Houses, Co-ops & Condos
Long Island homes range from compact Cape Cods to large colonials, each needing a system matched to its actual square footage and insulation. We run Manual J calcs and install high-efficiency systems with full town permit support.
HVAC Replacement & Upgrade
Swap Out Aging Equipment
Replacing an aging system on Long Island means navigating Nassau or Suffolk town permits alongside rebate applications. We remove old equipment, complete all filings, and install efficient replacements — often within a day or two.
TRUSTED PARTNERS
Brands We Work With
We install and service equipment from the world's leading HVAC and refrigeration manufacturers.
Daikin VRV multi-zone systems, FIT line ductless heat pumps, and Atmosphera air handlers — installed and serviced by Art HVAC's experienced Daikin installers. Installed and serviced across Nassau and Suffolk County homes and businesses. 
Fujitsu Halcyon ductless mini-splits, Airstage VRF, and Cold Climate H-series heat pumps — installed and serviced by Art HVAC's experienced Fujitsu technicians. Installed and serviced across Nassau and Suffolk County homes and businesses. 
Mitsubishi Electric M-Series and P-Series ductless mini-splits, Hyper-Heat (H2i) cold-climate heat pumps, and City Multi VRF — installed and serviced by Art HVAC's experienced technicians. Installed and serviced across Nassau and Suffolk County homes and businesses. 
LG Therma V air-to-water heat pumps, Multi V VRF, and Art Cool wall units — installed and serviced by Art HVAC. Installed and serviced across Nassau and Suffolk County homes and businesses. 
Carrier Infinity series gas furnaces, Greenspeed heat pumps, central AC, and commercial rooftop units — installed and serviced by Art HVAC's experienced Carrier installers. Installed and serviced across Nassau and Suffolk County homes and businesses. 
York YXV variable-capacity heat pumps, Affinity series, and Sunline commercial RTUs — installed and serviced by Art HVAC's experienced technicians. Installed and serviced across Nassau and Suffolk County homes and businesses. 
Heil Ion variable-speed gas furnaces, heat pumps, and central AC — Art HVAC delivers full design, install, and warranty service. Installed and serviced across Nassau and Suffolk County homes and businesses. 
Trane XV20i variable-speed heat pumps, gas furnaces, and Voyager commercial rooftop units — installed and serviced by Art HVAC's experienced technicians. Installed and serviced across Nassau and Suffolk County homes and businesses. 
Lennox Signature series heat pumps, SLP99V furnaces, and Solar-Ready inverter ACs — installed and serviced by Art HVAC's experienced Lennox installers. Installed and serviced across Nassau and Suffolk County homes and businesses. 
Samsung Wind-Free wall and ceiling cassettes, DVM S VRF, and EHS air-to-water heat pumps — Art HVAC installs Samsung HVAC across residential and commercial sites. Installed and serviced across Nassau and Suffolk County homes and businesses. 
Panasonic Aquarea air-to-water heat pumps, ETHEREA wall units, and Nanoe X air purification — Art HVAC handles Panasonic install, service, and warranty. Installed and serviced across Nassau and Suffolk County homes and businesses. 
Bosch IDS series inverter heat pumps, Greenstar gas boilers, and Climate 5000 ductless — installed and serviced by Art HVAC for residential and commercial projects. Installed and serviced across Nassau and Suffolk County homes and businesses. Long Island homes vary widely in size and age — our process starts with measurement and ends with a system your household understands.
Right System, Right the First Time
No hassle, no surprises. We handle everything so you can sit back and enjoy a perfectly climate-controlled space.
Site Survey & Load Calculation
We visit your Long Island property, measure every zone, and run a Manual J load calculation — particularly important in older Long Island homes where insulation and window quality vary considerably by decade.
System Design & Quote
We design a system scaled to your Long Island home's actual square footage and zoning needs, then produce a written quote with town permit costs included — no estimate-to-invoice inflation after the job starts.
Professional Installation
Our crews file with the relevant Long Island town building department, remove and dispose of old equipment, and complete installation with full protection of your home's interior surfaces and landscaping.
Commissioning & Walkthrough
We balance airflow across all zones, verify refrigerant charge, and walk you through your Long Island system's thermostat, warranty documentation, and the inspection process required by your town permit.
CLIENT TESTIMONIALS
Why Long Island Chooses ART HVAC
Real clients. Real jobs. Real results — not marketing copy.
David M.
1/28/2025
John Mckenzie
Jun 2025
Andrey K.
Jul 31
Rimma Y.
1/7/2025
Jade B.
12/7/2024
FAQ
Questions We Hear Every Day
Honest, engineer-level answers — no sales fluff.
What is the average cost of a new hvac system on Long Island? Installed, it runs $9,000–$20,000 for a typical single-family home. Nassau County homes tend toward the lower end; larger Suffolk County colonials or Capes requiring full duct retrofits push toward the top. PSEG Long Island rebates for qualifying heat pump installations reduce net cost by $800–$3,500, and the federal 25C tax credit applies on top of that for eligible HVAC equipment.
How long to install hvac system on Long Island? A straight swap with existing ductwork takes one to two days. Adding a new duct system to a previously unducted Long Island ranch or Cape Cod runs three to five days. Town permit processing in Nassau or Suffolk County adds one to three weeks of lead time — unlike NYC's online DOB filings, many Long Island towns require in-person or mailed permit applications before HVAC installation can begin.
Asking what to consider when buying a new hvac system on Long Island: prioritize SEER2 and HSPF2 efficiency ratings, since PSEG Long Island rebates are tied to minimum thresholds. Verify ductwork condition before committing to a system — older Long Island homes with fibrous or undersized ducts may need duct replacement to realize efficiency gains. Confirm whether your town requires a separate permit for electrical work tied to the HVAC installation. Manual J sizing is mandatory.
How much to install hvac in old house on Long Island without existing ductwork? Typically $12,000–$25,000 depending on home size and routing complexity. Many Nassau and Suffolk County homes built before the 1970s have no central duct system, so the HVAC installation includes new supply and return trunks, room diffusers, and an air handler. Ductless multi-zone systems are a competitive alternative that avoids duct runs and may qualify for additional PSEG Long Island rebates.
How much does a new hvac system increase home value on Long Island? Typically 5–7 percent of appraised value, and it meaningfully accelerates sale timelines. In Nassau and Suffolk County's active resale market, buyers flag aging heating and cooling equipment as a negotiating point; a recently installed high-efficiency system removes that objection. Appraisers treat HVAC replacement as a documented value-add when the system is under five years old with permits and warranty paperwork on file.
For Long Island homeowners asking how to finance hvac replacement, PSEG Long Island's on-bill financing program is the first place to look — payments appear on the utility bill with no upfront cost. Manufacturer same-as-cash offers and home-equity lines are also common. NYSERDA Clean Heat provides upfront incentives that reduce the financed amount. The federal 25C credit covers 30 percent of qualifying HVAC installation costs; for income-qualified Nassau or Suffolk households, NYSERDA's EmPower+ may cover a portion outright.
Still have questions? Contact us
A Proper Fit for Your Long Island Home
Get a Free Installation Estimate.
We visit your Long Island property, account for square footage and local permit requirements, and give you an itemized quote with available rebates clearly explained. Straightforward from start to finish.