Jen Air Inc
“Just had a 3 zone mini split system installed by Jen Air and could not be happier.”
Best HVAC Contractors near Smithtown, NY
We have one company in Smithtown on file, and it is on this list, along with 14 from towns including Nesconset (3, 4 mi), Bohemia (2, 8 mi) and Bay Shore (2, 9 mi).
6 open 24/7 · 13 open weekends · 13 rated 4.5+ · 6 show a license
Data verified October 18, 2026
Yas Hvac Corporation
“Yangklin is an excellent technician - extremely careful, thorough - he explained everything; plus very fair price.”
B&R Plumbing and Heating
“Awesome service I have been using this company for 40+ years great family, business and local business.”
Coastal Refrigeration
“Ray was immediately responsive, professional and eager to share his expert opinion on the repair of our appliance.”
GMG Hvac Inc.
“GMG came, even the day before Memorial day and fixed my unit after the other service provider couldn't fix it and wouldn't bring anyone back until after the weekend.”
Triple H Insulation
“Salesman was great and thorough on the entire process and the install team was on time and courteous throughout the time they were here.”
The 15 companies listed for Smithtown, NY work on furnaces, heat pumps and air conditioners. Each profile repeats what the company publishes about its hours, its license and the equipment it fits, alongside ratings and quotes drawn from public reviews.
Area overview: Smithtown, NY
The 15 companies on this page are rated from 4.0 to 5.0 across 3,193 reviews; 13 have 50 or more reviews and 13 are rated 4.5 or higher. When customers rate these companies on specific qualities, they most often praise professionalism (89%), quality (82%) and responsiveness (82%). The topics that come up most in reviews of the companies on this page are "cleanliness", "estimates" and "price". 6 are open around the clock; 13 are open on Saturdays and 7 on Sundays. The services the companies on this page list most often on their websites are heating services (3), indoor air quality (3), cooling services (2) and heating (2). 6 show a license on their websites; 1 lists staff certifications (BPI) and 3 have a BBB rating of A or A+. 8 have ten or more years of experience, the longest 36 years. 7 offer emergency call-outs; 9 offer financing or payment plans; 9 give free estimates; 7 are family- or locally-owned and 7 list coupons or special offers. We count these figures across the companies on this page; distances are straight-line, and hours and prices change, so confirm the details with the company before you book.
Which companies listed for Smithtown answer no-heat calls at night?
Round the clock availability appears in 6 of the 15 listings on this page. An overnight visit is usually a diagnosis and a temporary fix, since supply counters are shut until morning. Ask what the after hours call out is before the truck leaves.
Dashing Dan's Plumbing & Heating Inc.
“Brett who did a sump pump job for me recently responded and fixed the problem in the wet crawl space.”
Sunray Services
“They were extremely easy to have here, very pleasant, easy to talk with, even put up with my yapping dog!”
Long Island's Burner King
“They made sure to cover my floors up as well as the grass outside leading into the house.”
Ljv Mechanical
“We couldn't be happier and I highly recommend that if you're looking to upgrade or add a new HVAC system LJV mechanical is the right choice.”
Varsity Home Service
“I've used 2 other HVAC service companies in the past and Varsity has been our best experience”
Retro Hot Water & Heating
“I want to commend the worker you sent for his commendable work; very conscientious and diligent.”
Cool Pro Mechanical
“Eric and his crew did an excellent job replacing my central A/C and forced hot air unit.”
Delcore Electric
“Ran the cables so neatly and mounted the EV charger and 220 outlet perfectly.”
K2 Heating & Air Conditioning
“K2 Heating did an excellent job installing the central air conditioning at my home.”
Why these companies made our list
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