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HVAC Contractors in Nassau County, NY

96 HVAC contractors listed · Updated Oct 27, 2026

Find HVAC contractors serving Nassau County for heating, cooling, boilers and heat pumps, and request free quotes from local pros.

Avahere lists 96 HVAC contractors across 40 Nassau County towns. Of these, 23 show a public phone number, 51 link to a website and 22 list a street address. The most listings are in Freeport (7), Massapequa (7), New Hyde Park (6). None of these businesses has claimed its page yet, so the details come from public business records.

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Towns with HVAC contractors

40 Nassau County towns, A–Z. Pick yours to see local listings.

HVAC Contractors in Nassau County: common questions

How many HVAC contractors are in Nassau County, NY?
Avahere lists 96 HVAC contractors across 40 towns in Nassau County.
Do HVAC contractors in Nassau County need a license?
Most home improvement work on homes in Nassau County requires a home improvement license from the Nassau County Department of Consumer Affairs. Ask for the license number and look it up on the county website before you hire.
How do I get quotes from HVAC contractors on Avahere?
Describe your job once and local HVAC contractors that fit can reply with questions and quotes. It is free for you and for the businesses, and you decide who to hire, if anyone.
I run a HVAC contractor business. How do I update my listing?
Find your business and choose "Claim it free". After a quick check you can edit your details, add services and photos, and answer customers at no cost.
Is Avahere free?
Yes. Avahere is free for customers and for businesses. There are no lead fees, and businesses cannot pay to rank higher.

Listings come from public business records and from business owners. Avahere does not show owner names or private contact details. Spot a mistake or want a listing removed? Remove a listing or contact us.