Long Island HVACSame-Day Service
Same-day heating & cooling across Nassau County and 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
"Quoted three other contractors for a new central AC. Home+ was the only one who did a Manual J load calc before pricing the job."
Who is the best HVAC and AC repair company on Long Island, NY?
Home+ Air & Heat is a NATE-certified HVAC and AC repair company on Long Island, NY, headquartered in Jericho and providing same-day heating, cooling, boiler, water heater, and indoor air quality service across Nassau County and Western Suffolk County. 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, NY homeowners.
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People Also Ask
Quick answers to the questions Long Island, NY homeowners search most about HVAC and AC repair.
How much does HVAC service cost on Long Island?
Long Island HVAC repairs typically run $150–$850 with same-day diagnostic. Central AC installation ranges $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 including the National Grid line and chimney work. We provide flat-rate, in-writing quotes after an in-home assessment.
Who is the best HVAC contractor on Long Island?
Home+ Air & Heat is consistently rated among the best Long Island HVAC contractors — NATE-certified technicians, 5/5 on Google, headquartered in Jericho with same-day service across Nassau and Western Suffolk. We lead with Trane, Mitsubishi Electric, and Bosch installs and back every job with a 1-year labor and 10-year parts warranty.
What HVAC brands are best for Long Island homes?
For Long Island, the best HVAC brands balance reliability, coastal-corrosion resistance, and parts availability. Trane and American Standard lead for central AC and furnaces, Mitsubishi Electric and Fujitsu for ductless mini-splits and cold-climate heat pumps, and Bosch and Weil-McLain for high-efficiency boilers. Salt-air zones near the South Shore should always spec coastal coil coatings.
How fast can you get to me on Long Island?
Most Nassau and Western Suffolk addresses are within a 25–45 minute drive of our Jericho dispatch base. For emergency no-heat or no-cooling calls we prioritize same-day dispatch and frequently arrive the same morning when you call early.
How fast can you install a new HVAC system on Long Island?
Most Long Island central AC and furnace replacements are installed in a single day. Boiler swaps and oil-to-gas conversions typically take one to two days. We confirm the install timeline in writing before any work begins so you know exactly what to expect.
Pick Your County
Home+ Air & Heat covers all of Nassau County and Western Suffolk — from Great Neck and Long Beach east through Huntington, Smithtown, Babylon, and Islip. Pick the hub that matches your address for town-level pricing, ZIP coverage, and same-day dispatch from our Jericho headquarters.
Nassau County HVAC
Every town from Great Neck to Long Beach. Pricing, ZIPs, neighborhood pages, and same-day dispatch from Jericho.
Open Nassau County hubSuffolk County HVAC
Huntington, Babylon, Smithtown, Islip, and the Western Suffolk hamlets. Same-day dispatch east through the Smithtown/Islip line.
Open Suffolk County hubLong Island, NY Climate at a Glance
Long Island summers run hot and humid (~84°F July highs, 65–72°F dew points), winters dip to ~26°F, and homes within a mile of the Atlantic or Sound face year-round salt-air corrosion. That mix is why Long Island HVAC sizing, brand selection, and coastal coil coatings all need a local hand — not a national rule of thumb.
What Long Island HVAC Needs, Quarter by Quarter
Long Island HVAC priorities shift four times a year: fall heating prep before the first Nor'easter, winter no-heat dispatch, spring AC tune-ups in the quiet shoulder window, and summer humidity plus salt-air load management. Booking inside each window — not after the failure — is the difference between a tune-up and an emergency.
Pre-Nor'easter heating prep
Furnace and boiler tune-ups, oil-tank top-offs, thermostat calibration, and heat-pump defrost checks before the first Nor'easter pushes inland temps into the 20s.
No-heat dispatch + safety
Same-day no-heat calls peak Dec–Feb. We prioritize carbon-monoxide checks on older Nassau boilers and cold-climate heat-pump performance below 20°F.
Shoulder-season AC tune-up
The quietest window for AC tune-ups, coil cleaning, and refrigerant top-offs — book in April to avoid the May heat-wave backlog and lock in current parts pricing.
Humidity + salt-air load
South-shore dew points hit 72°F and condensers near the Atlantic or Sound corrode fastest. We inspect coastal coil coatings, check capacitors, and right-size for humid Long Island load — not just temperature.
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.
Call us or Book online?
Call (516) 259-1191 for emergencies and same-day service; book online for planned installs, tune-ups, and quotes. Our office answers 24/7 — phone calls always reach a real Long Island dispatcher first.
Call when…
- No heat, no cooling, or water leaking from a system
- Burning smell, gas smell, or breaker keeps tripping
- You need same-day service or an after-hours visit
- You'd rather talk to a person than fill out a form
Book online when…
- Pricing a new install or replacement system
- Scheduling an annual AC or boiler tune-up
- Quoting an oil-to-gas conversion or heat-pump upgrade
- Picking your own appointment window
The Local HVAC Contractor Long Island Trusts
Long Island homes are not like the rest of the country. Coastal humidity off the Long Island Sound and the Atlantic stresses cooling systems all summer long. Winter Nor'easters push older boilers and furnaces past their limits. And the housing stock — from pre-war Tudors in Garden City and Huntington Village, to post-war Levittown and Commack ranches, to North Shore estates — means there is no single "right" HVAC system for the Island.
Home+ Air & Heat operates as a Long Island-local company. Our trucks are dispatched from Jericho, geographically central between Nassau and Western Suffolk. We have installed in practically every neighborhood from the Queens border out through the Smithtown/Islip line.
Heating across Long Island
A huge share of Long Island homes still run on cast-iron oil or gas boilers from the 1970s and 80s. We handle steam and hot-water boiler repairs, modern condensing boiler swaps, gas furnace installs, and full oil-to-gas conversions in coordination with National Grid. When sizing matters, we run the heat loss calc — not a square-footage guess.
Cooling across Long Island
Coastal humidity changes how AC should be sized and dehumidified. We install central AC, cold-climate heat pumps, and ductless mini-splits — and protect coastal-zone condensers against salt-air corrosion with the right coil coatings and pad placement. Right-sized systems run quieter, last longer, and actually pull humidity out of the air.
Indoor air quality on Long Island
Tight modern envelopes plus seasonal pollen and salt-air particulates put extra demand on filtration. We design IAQ upgrades — high-MERV filtration, UV, fresh-air ventilation, and whole-home dehumidification — that match the system instead of being bolted on.
Code, quality, and warranties
Every Long Island install is performed to NY State mechanical code and backed by our 1-year labor and 10-year parts coverage. Workmanship that's built to last — and documented so factory warranties stay valid for the full term.
HVAC Problems Specific to Long Island
Coastal, post-war, and pre-war housing all create issues a national chain won't notice. We see them every week.
Salt-air corrosion on both shores
Atlantic-side condensers in Long Beach, Lido, Babylon, and Bay Shore — and Sound-side units from Manhasset to Northport — fail years early without coastal coil coatings and proper pad placement.
Coastal humidity overload
Long Island Sound and Atlantic humidity defeat oversized AC systems. Manual J load calcs and variable-speed equipment finally pull the moisture out instead of short-cycling around it.
Oil-to-gas conversions
Tens of thousands of pre-1970 Long Island homes still run oil. We coordinate the boiler/furnace swap, National Grid gas line, chimney liner, and oil-tank removal as one project.
Aging cast-iron steam boilers
Common in Garden City, Rockville Centre, Huntington Village, and pre-war Long Beach homes. We service one-pipe and two-pipe steam, and quote modern condensing replacements when the math makes sense.
Undersized post-war ductwork
Levittown, Hicksville, Plainview, Commack, and Deer Park ranches were built around small original ducts. Modern higher-CFM systems need rework or static-pressure-friendly equipment to perform as rated.
PSEG Long Island electrical capacity
Heat pump and EV charger upgrades push older 100-amp panels past their limit. We flag the electrical scope upfront so a replacement isn't derailed by a service-upgrade surprise.
Every HVAC Service, Across Long Island
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 Long Island cooling repair.
AC Installation
Right-sized central AC and heat pumps for Long Island 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 Long Island hard.
Furnace Installation
High-efficiency gas furnaces installed to NY State code.
Boiler Repair
Steam and hot-water boiler experts — common in older Long Island homes.
Boiler Installation
Modern condensing boilers and oil-to-gas conversions.
What HVAC Service Costs on Long Island
Most Long Island 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. All quotes are flat-rate, in writing, before any work begins.
| Service | Typical Long Island Range | Notes |
|---|---|---|
| AC repair (diagnostic + most fixes) | $150 – $850 | Same-day across Long Island |
| 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 to NY State code |
| 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, properly vented |
| 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 |
Ranges reflect typical Long Island pricing for standard residential work. Actual cost depends on tonnage/BTU, efficiency tier, accessibility, ductwork condition, and electrical capacity. Installation quotes are free and based on an in-home assessment.
How Long Island HVAC Contractors Compare
Three options most Long Island homeowners weigh — and what each one actually delivers.
| What you get | Big national chain | Handyman / one-truck | Home+ Air & Heat |
|---|---|---|---|
| Local to Long Island | |||
| NATE-certified technicians | |||
| Manual J load sizing | sometimes | ||
| Coastal coil coating option | |||
| Flat-rate, in-writing pricing | sometimes | ||
| 1-yr labor / 10-yr parts | varies | ||
| 24/7 live dispatch | |||
| Same-day availability | sometimes |
Comparison reflects typical experience across Long Island contractors. Individual companies vary.
How to Choose an HVAC Contractor on Long Island
To pick a reliable Long Island HVAC contractor, verify NY State licensing, insurance, and NATE certification, require a Manual J load calculation before any install, get the warranty in writing, and compare three line-item written quotes. For homes within a mile of the coast, also require coastal coil coatings.
-
1Verify a NY State Home Improvement / HVAC contractor license (ask for the number).
-
2Confirm liability insurance and workers' comp — request a Certificate of Insurance.
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3Require NATE-certified technicians on installs and complex repairs.
-
4Insist on a Manual J load calculation before any install quote — not square-footage shortcuts.
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5Get the equipment + labor warranty in writing (look for 10-yr parts / 1-yr labor at minimum).
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6For coastal homes (within ~1 mile of the Atlantic or Sound), require coastal coil coatings.
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7Compare 3 written, line-item quotes — not phone estimates.
-
8Confirm the contractor is local enough to honor warranty service same-day.
The HVAC Brands We Lead With on Long Island
Home+ Air & Heat leads with Trane (central AC and furnaces), Mitsubishi Electric (mini-splits and heat pumps), and Bosch (inverter heat pumps and condensing boilers) on Long Island — chosen for parts availability across Nassau and Suffolk supply houses, coastal-grade durability, and proven reliability. We also install Rheem and Bradford White water heaters and service every major brand including Carrier, Lennox, Goodman, and York.
| Brand | What we install | Why for Long Island | Tier |
|---|---|---|---|
| Trane | Central AC · Furnaces | Reliability, parts in every Nassau & Suffolk supply house | Lead install brand |
| Mitsubishi Electric | Mini-splits · Heat pumps | Ductless additions, attic conversions, Long Island additions | Lead install brand |
| Bosch | Inverter heat pumps · Boilers | Quiet operation, high SEER2, condensing wall-hung boilers | Lead install brand |
| Rheem | Water heaters | Tank, tankless, hybrid — fastest parts availability on Long Island | Preferred |
| Bradford White | Water heaters | Contractor's-choice tanks, sold only through pros | Preferred |
| Weil-McLain | Cast-iron & condensing boilers | Pre-war Long Island homes still on hot-water heat | Preferred |
| Carrier · Lennox · Goodman · York | Service & repair | Full diagnostic and repair on every brand we encounter | Service all brands |
We service every major HVAC brand on Long Island — Carrier, Lennox, Goodman, York, American Standard, and more. Brand recommendations on a quote are based on home size, fuel, and load calc — not pushed inventory.
Popular Long Island HVAC Searches
Why Long Island Homeowners Pick Home+
Licensed & Insured in NY
Fully licensed Long Island 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 Nassau and 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 Long Island
Real reviews from homeowners in Nassau County and Western Suffolk — North Shore, South Shore, and everywhere in between.
"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."
"Replaced our 22-year-old central AC with a Trane system in one day. The crew protected the floors, sized it properly, and the new unit is whisper quiet. Best HVAC experience we've had on Long Island."
"We've used them for AC installation, mini-split additions, and annual maintenance. Always on time, always thorough. It's rare to find this level of service anymore."
"Got three quotes for a boiler replacement. Home+ wasn't the cheapest, but they were the only company that ran a real load calc and explained the venting changes. Worth it."
"After years of dealing with one-truck handymen, we finally have a real HVAC company. Honest, transparent pricing, and they showed up exactly when promised."
"Salt-air had eaten our old condenser in under 8 years. Home+ specced a coastal coil-coated unit and explained exactly why. Two summers in and it still looks new."
Every truck, every install — credentialed.
Example Monthly Payments on $10,000 Financed
Most Long Island HVAC installs can be financed through Synchrony Bank with APRs from 5.99% to 9.99% over 37–132 months, plus 0% APR promotional plans on qualifying equipment. Decisions usually come back in minutes, no down payment required for approved buyers.
Home+ Preferred
5.99% APR · 37 months
Lowest total interest
Home+ Smart
7.99% APR · 61 months
Balanced term + payment
Home+ Comfort
9.99% APR · 132 months
Lowest monthly payment
Examples shown for illustration on $10,000 financed at the stated APRs. Actual payment depends on project total and credit approval. Subject to credit approval through Synchrony Bank.
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
Long Island Towns We Serve
All of Nassau County and Western Suffolk. Don't see yours? Call us — we likely cover it.
Nassau County Open Nassau hub →
Western Suffolk County
Related Long Island HVAC Guides
Deeper reads on financing, brand rankings, warranties, and maintenance — written specifically for Long Island homes.
Best HVAC Contractors on Long Island 2026
Our 6-point ranking of the top 10 Nassau & Suffolk installers — including us.
Long Island HVAC Financing
Synchrony plans, 0% APR options, monthly examples.
Best Furnace Brands 2026
Trane, Carrier, Lennox, Bosch — ranked for LI homes.
Best Mini-Split Brands
Mitsubishi, Fujitsu, Daikin compared head-to-head.
Best Heat Pump Brands
Cold-climate picks that hold capacity below 20°F.
Warranty Standards
10-yr parts, 1-yr labor — what's covered, what's not.
Long Island Coverage Map
Headquartered in Jericho — minutes from every Nassau and Western Suffolk town.
Long Island HVAC FAQs
Real answers about service, brands, and pricing across the Island.
Need HVAC Help on Long Island?
Call now or book online — same-day appointments across Nassau and Western Suffolk.