Serving Suffolk & Nassau County · Long Island, NY
Port Jefferson, Suffolk County
HVAC Service in Port Jefferson, NY.
Dependable heating and air conditioning repair, installation, and emergency service for Port Jefferson homeowners. Serving the North Shore of Long Island since 2019.
What we offer in Port Jefferson
Full-Service HVAC for Port Jefferson Homes & Businesses.
Serving Port Jefferson since 2019
Your Local Port Jefferson HVAC Experts
A1 Heating & Air Conditioning has been serving Port Jefferson and the surrounding Suffolk County area since 2019. As a family-owned business, we understand the unique heating and cooling needs of Long Island homes — from older oil-heated colonials to newer construction with central air.
We also serve nearby Port Jefferson Station, Setauket, Stony Brook, and Mount Sinai — so wherever you are in the area, we're close by.
Common questions
HVAC Questions from Port Jefferson Homeowners
Do you serve Port Jefferson and Port Jefferson Station?
Yes — A1 Heating & Air Conditioning serves both Port Jefferson and Port Jefferson Station, as well as nearby Setauket, Stony Brook, Mount Sinai, and Miller Place.
My boiler stopped working in Port Jefferson — can you help?
Yes. We repair and replace boilers throughout Port Jefferson and the North Shore. Call 631-331-2102 for emergency boiler service — we offer 24/7 response for heating emergencies.
Do you install ductless AC in Port Jefferson homes?
Absolutely. Many older Port Jefferson homes don't have existing ductwork, making ductless mini-split systems an ideal solution. We install Mitsubishi, Daikin, and other leading ductless brands.
How do I schedule an HVAC tune-up in Port Jefferson?
Call us at 631-331-2102 or use our online contact form to schedule a tune-up. We recommend scheduling your AC tune-up in spring and your heating tune-up in fall for best results.
Do you offer free estimates for new HVAC systems in Port Jefferson?
Yes. We provide free, no-obligation estimates for new heating and cooling system installations throughout Port Jefferson and Suffolk County. We'll assess your home and recommend the right system for your needs and budget.
Our Services
Nearby Service Areas
Get in Touch
Serving Port Jefferson and all of Suffolk County. Same-day and emergency service available.
631-331-2102Serving Port Jefferson & surrounding areas
Need HVAC Service in Port Jefferson?
Same-day and emergency service available. Licensed, insured, and trusted by Port Jefferson homeowners since 2019.