Serving Suffolk & Nassau County · Long Island, NY
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.
What we do
Complete HVAC Services for Long Island
From routine maintenance to full system replacements — we handle it all with the same level of care and professionalism.
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.
Customer reviews
What Long Island Homeowners Say
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
Customer stories
Real Homeowners.
Real Results.
"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."
"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."
"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."
"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."
"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."
"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."
Authorized dealer & service provider for leading brands
Service Area
Serving All of Long Island
A1 Heating & Air Conditioning provides HVAC service throughout Suffolk County. Click your town to learn more.
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.