Suffolk County HVACSame-Day Service
Same-day heating & cooling across Huntington, Smithtown, Babylon, Islip and the rest of Western Suffolk. Local to Jericho, NATE-certified, rated 5/5 on Google.
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Home+ Quality Shield
NATE-Certified · Licensed & Insured in NY
"Showed up the same day in Huntington and had our system running before nightfall. Honest pricing, no upsell."
What is the best HVAC company in Suffolk County?
Home+ Air & Heat is a NATE-certified Suffolk County HVAC company headquartered in Jericho, providing same-day heating, cooling, boiler, water heater, and indoor air quality service across Western Suffolk — Huntington, Smithtown, Babylon, Islip, and surrounding hamlets. We answer calls 24/7, give flat-rate quotes upfront, back installs with a 1-year labor and 10-year parts warranty, and hold a 5/5 Google rating from local Long Island homeowners.
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What Happens When You Call
No phone trees. No mystery pricing. Just a clear three-step path.
1. Call or book online
Talk to a real Long Island dispatcher 24/7 — no robots, no phone trees.
2. Same-day diagnosis
A NATE-certified tech inspects, explains, and shows you the options.
3. Honest, flat-rate quote
Upfront pricing before any work begins — repair or replace, your call.
Need help right now?
No heat, no cooling, water leak, or burning smell? Skip the form — we answer the phone 24/7.
Call (516) 259-1191Planning a project?
Replacing a system, scheduling a tune-up, or pricing an oil-to-gas conversion? Book a no-pressure visit.
The HVAC Contractor Western Suffolk Trusts
Suffolk County housing runs the gamut — from pre-war Huntington Village colonials, to mid-century North Shore estates in Smithtown and Northport, to dense post-war ranches across Commack, Deer Park, Brentwood, and Central Islip, to coastal homes in Babylon, Bay Shore, and Lindenhurst. Each one wants a slightly different HVAC system. We've installed in all of them.
Home+ Air & Heat dispatches from Jericho — minutes from the Nassau/Suffolk line — and our trucks are in Western Suffolk every day of the week. We pull Suffolk County mechanical permits, coordinate National Grid for gas conversions, and back every install with a 1-year labor and 10-year parts warranty.
Suffolk County Climate & What It Means for Your HVAC
Western Suffolk summers run 82–86°F highs with 68–74°F dew points along the South Shore, while January lows drop to 22–26°F inland in Commack, Smithtown, and Dix Hills. Coastal homes within a mile of the Great South Bay or Long Island Sound need salt-air-rated condensers; Manual J load calcs and variable-speed equipment are non-negotiable for humidity control.
HVAC Problems Specific to Suffolk County
Coastal South Shore, post-war, and pre-war housing all create issues a national chain won't notice.
Salt-air corrosion on the South Shore
Atlantic-side condensers in Babylon, West Babylon, Bay Shore, and Lindenhurst fail years early without coastal coil coatings and proper pad placement.
Coastal humidity overload
South Shore humidity defeats oversized AC systems — they cool fast, short-cycle, and leave the house clammy. Manual J load calcs and variable-speed equipment fix it.
Oil-to-gas conversions
Older Huntington, Smithtown, and Northport homes still run oil. We coordinate the boiler swap, National Grid gas line, chimney liner, oil-tank removal, and Suffolk permits as one project.
Aging cast-iron steam boilers
Common in Huntington Village and pre-war Northport homes. We service one-pipe and two-pipe steam, and quote modern condensing replacements when the math makes sense.
Undersized post-war ductwork
Commack, Deer Park, Brentwood, and Central Islip ranches were built around small original ducts. Modern higher-CFM systems need rework or static-pressure-friendly equipment.
PSEG Long Island electrical capacity
Heat pump and EV charger upgrades push older 100-amp Suffolk panels past their limit. We flag electrical scope upfront so a replacement isn't derailed by a service-upgrade surprise.
Every HVAC Service, Across Suffolk County
Heating, cooling, hot water, and indoor air quality — one local contractor for it all.
Cooling Services
AC Repair
Same-day diagnosis, transparent pricing on every Suffolk cooling repair.
AC Installation
Right-sized central AC and heat pumps for Suffolk homes.
Mini-Split Installation
Ductless comfort for additions, attics, and historic homes.
Heat Pump Installation
Cold-climate heat pumps that work in Long Island winters.
Heating Services
Furnace Repair
Fast warm-air furnace fixes when winter hits Suffolk hard.
Furnace Installation
High-efficiency gas furnaces installed to NY State code.
Boiler Repair
Steam and hot-water boiler experts — common in older Suffolk homes.
Boiler Installation
Modern condensing boilers and oil-to-gas conversions.
What HVAC Service Costs in Suffolk County
Most Suffolk County HVAC repairs cost $150–$850 with same-day diagnostic. Central AC installs run $7,500–$14,000, gas furnaces $4,800–$9,500, condensing boilers $8,500–$16,000, and oil-to-gas conversions $12,000–$22,000. Quotes are flat-rate and in writing.
| Service | Typical Suffolk Range | Notes |
|---|---|---|
| AC repair (diagnostic + most fixes) | $150 – $850 | Same-day across W. Suffolk |
| Furnace repair | $150 – $850 | Most repairs same visit |
| Boiler repair | $200 – $1,200 | Steam & hot-water |
| Central AC installation | $7,500 – $14,000 | Right-sized, Manual J |
| Gas furnace installation | $4,800 – $9,500 | High-efficiency, permits incl. |
| Cold-climate heat pump install | $9,000 – $18,000 | Whole-home or zoned |
| Ductless mini-split (per zone) | $4,500 – $7,500 | Single-zone install |
| Boiler replacement | $8,500 – $16,000 | Condensing gas, vent + permits |
| Oil-to-gas conversion (boiler) | $12,000 – $22,000 | Includes line, chimney, removal |
| Tankless water heater install | $3,800 – $6,500 | Gas, vented to code |
| Annual HVAC tune-up | $199 | Comfort Members included |
Western Suffolk Towns We Serve
Don't see yours? Call us — we likely cover it.
HVAC in Huntington
Central to Western Suffolk — same-day from Jericho. Pre-war Tudors and modern colonials alike.
HVAC in Babylon
South Shore coastal-spec installs and steady summer AC repair work for Babylon homes.
HVAC in Smithtown
North Shore service: oil-to-gas conversions, condensing boilers, and high-efficiency cooling.
HVAC in Islip
Town of Islip — central AC, mini-splits, and boiler service across every hamlet.
HVAC in Northport
Pre-war waterfront homes get steam boiler service and discreet ductless retrofits.
HVAC in Commack
Post-war Commack ranches: duct rework, panel upgrades, right-sized AC swaps.
HVAC in Deer Park
Furnace and AC service for Deer Park and surrounding Suffolk neighborhoods.
HVAC in West Babylon
Coastal coil coatings and dehumidification for South Shore West Babylon homes.
HVAC in Bay Shore
Bay Shore central AC, mini-splits, and boiler service near the Great South Bay.
HVAC in Brentwood
Same-day repair and right-sized installs across Brentwood's residential blocks.
HVAC in Hauppauge
Heat pumps, condensing boilers, and IAQ upgrades for Hauppauge homes.
HVAC in Kings Park
Estate-grade installs on the North Shore — multi-zone systems and smart controls.
HVAC in Melville
Modern Melville homes: high-efficiency installs and seasonal tune-ups.
HVAC in Dix Hills
Premium installs for larger Dix Hills properties — multi-stage and variable-speed equipment.
HVAC in Central Islip
Same-day diagnostic and full installs across Central Islip.
HVAC in Lindenhurst
Coastal Lindenhurst service with corrosion-resistant condensers and Manual J sizing.
Plus every Western Suffolk hamlet
Home+ Air & Heat covers every hamlet across the Towns of Huntington, Babylon, Islip, and Smithtown — same-day dispatch from Jericho, NATE-certified techs, and Suffolk County mechanical permits handled in-house.
Popular Suffolk County HVAC Searches
Why Suffolk County Homeowners Pick Home+
Licensed & Insured in NY
Fully licensed Suffolk County HVAC contractor with full liability and workers' comp coverage.
NATE-Certified Technicians
Every tech holds North American Technician Excellence credentials — the industry gold standard.
24/7 Emergency Service
Nights, weekends, and holidays — we answer the phone when your heat or AC fails.
Upfront, Honest Pricing
Flat-rate quotes before any work begins. No surprises, no overtime gimmicks.
1-Year Labor / 10-Year Parts
Industry-leading warranties on every installation we perform.
Local to Long Island
Headquartered in Jericho — minutes from every Western Suffolk town.
Brands We Service — Any Make, Any Model
Factory-trained technicians for all major HVAC manufacturers
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Don't see your brand? We service all manufacturers. Call us to confirm.
Trusted Across Nassau County
Real reviews from homeowners in your neighborhood
"Home+ came out within an hour when our furnace died on the coldest night of the year. Professional, fast, and fair pricing. They've been our go-to ever since."
Michael R.
"We've used them for both AC installation and annual maintenance. Always on time, always thorough. It's rare to find this level of service anymore."
Jennifer L.
"After getting quotes from 3 companies, Home+ was the most honest and transparent. No upselling, just fixed what needed fixing. Highly recommend."
David S.
"The technician explained everything clearly and even showed me how to maintain my system between visits. That kind of care is why we're now Home+ members."
Maria G.
Suffolk County HVAC Financing
Synchrony financing with low monthly payments and deferred-interest options on qualifying installs. Most decisions in minutes.
Year-Round Comfort. Priority Care.
Join Nassau County homeowners who never worry about HVAC maintenance again. Priority service, exclusive discounts, and peace of mind.
Starting at
or $299/year billed annually
vs. booking tune-ups & diagnostics separately
Suffolk County Coverage Map
Headquartered in Jericho — minutes from the Nassau/Suffolk line.
Suffolk County HVAC FAQs
Real answers about service, permits, brands, and pricing across Western Suffolk.
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Need HVAC Help in Suffolk County?
Call now or book online — same-day appointments across Western Suffolk.