Serving Suffolk & Nassau County · Long Island, NY

🚨  24/7 Emergency HVAC Service Available — Call Us Now: 631-331-2102  ⚡  Same-Day Service · Licensed & Insured · Serving All of Long Island  🔧🚨  24/7 Emergency HVAC Service Available — Call Us Now: 631-331-2102  ⚡  Same-Day Service · Licensed & Insured · Serving All of Long Island  🔧🚨  24/7 Emergency HVAC Service Available — Call Us Now: 631-331-2102  ⚡  Same-Day Service · Licensed & Insured · Serving All of Long Island  🔧🚨  24/7 Emergency HVAC Service Available — Call Us Now: 631-331-2102  ⚡  Same-Day Service · Licensed & Insured · Serving All of Long Island  🔧🚨  24/7 Emergency HVAC Service Available — Call Us Now: 631-331-2102  ⚡  Same-Day Service · Licensed & Insured · Serving All of Long Island  🔧🚨  24/7 Emergency HVAC Service Available — Call Us Now: 631-331-2102  ⚡  Same-Day Service · Licensed & Insured · Serving All of Long Island  🔧
Serving Long Island Since 2019

Trusted HVAC Service
for Long Island Homes.

Licensed, insured, and family-owned since 2019. Honest, professional heating and cooling service — done right the first time.

Licensed & Insured
Same-Day Service
Family Owned & Operated
Financing Available
Up to 10-Year Warranty
5.0 Google Rating
5.0
Based on 230+ Google reviews
See what our customers say →
Licensed & Insured
Your peace of mind is our priority
Same-Day Service
Fast response when you need it most
Proudly Serving
Suffolk & Nassau Counties
Family Owned
Local family business you can trust
Financing Available
Flexible options to fit your budget
24/7 Emergency
We're here anytime

Why homeowners choose us

Professional Service You Can Actually Trust

We've been serving Long Island homeowners since 2019. Our reputation is built on honest work, fair pricing, and showing up when we say we will.

Trained & Certified Technicians
Our technicians are NATE-certified and factory-trained on all major brands.
Fast Response Times
Same-day and next-day appointments available. We know comfort can't wait.
Local Long Island Experts
We've served Suffolk and Nassau County since 2019. We know the area and its homes.
Transparent, Upfront Pricing
No surprise charges. We give you a clear price before any work begins.
Flexible Financing
Multiple financing options including 0% interest promotions on qualifying systems.
Up to 10-Year Warranty
Industry-leading warranty coverage on parts and labor for qualifying installations.
A1 HVAC technician performing professional service
10 yr
Warranty

Customer reviews

What Long Island Homeowners Say

5.0
230+ Google reviews

Financing options

Comfort That Fits Your Budget

A new HVAC system is a major investment. We offer flexible financing options to make it manageable — with fast approvals and transparent terms.

  • 0% interest promotional financing available
  • Low monthly payment options
  • Fast, easy online application
  • No prepayment penalties
Ask About Financing
Flexible Plans
Monthly payments to fit any budget
Quick Approval
Fast and easy application process
0% Interest
Promotional options on qualifying systems
No Hidden Fees
Transparent pricing, always

Customer stories

Real Homeowners.
Real Results.

5.0
230+ Google reviews

"Our furnace died on the coldest night of the year. A1 had a technician at our door within two hours and a brand-new system installed the very next morning. The crew was professional, clean, and explained everything. We've been warm ever since."

M
Michael R.
Smithtown, NY
Furnace Replacement

"We got three quotes for a new central AC system and A1 came in with the best price and the most thorough explanation of what we actually needed. Installation was done in one day. Our house has never been this cool and comfortable in the summer."

J
Jennifer L.
Commack, NY
AC Installation

"Called at 9pm on a Saturday when our AC stopped working during a heat wave. The technician arrived by 11pm, diagnosed a failed capacitor, and had us back up and running before midnight. Unbelievable service. This is the only HVAC company we will ever call."

T
Thomas & Karen B.
Huntington, NY
Emergency AC Repair

"A1 has been maintaining our boiler for three years now. They always show up on time, explain what they find, and never try to upsell us on things we don't need. Honest, reliable, and genuinely good people. Highly recommend to anyone on Long Island."

S
Sandra M.
Port Jefferson, NY
Boiler Service

"Had a ductless mini-split installed in our addition and the process was seamless from start to finish. The technician walked us through every option, the installation was neat and professional, and the system works perfectly. Couldn't be happier."

D
David K.
Hauppauge, NY
Ductless Mini-Split

"Signed up for the maintenance plan two years ago and it has already paid for itself. They caught a cracked heat exchanger during a routine inspection — something that could have been a serious safety issue. Worth every penny for the peace of mind alone."

P
Patricia O.
Stony Brook, NY
Annual Maintenance Plan

Authorized dealer & service provider for leading brands

Lennox
Carrier
Trane
Rheem
Navien
Generac
Mitsubishi
Honeywell

Ready to get started?

Schedule Service Today.
Same-Day Appointments Available.

Our team is standing by. Call now or request a free quote online — we'll get back to you fast.

No obligation
Fast response
Upfront pricing
Licensed & insured