Retro Hot Water & Heating
“They are professionals through and through and would recommend them continuously to friends and families and neighbors.”
Best HVAC Contractors near Oyster Bay, NY
We have one company in Oyster Bay on file, and it is on this list, along with 14 from towns including Bay Shore (3, 14 mi), West Babylon (2, 10 mi) and Bethpage (1, 4 mi).
7 open 24/7 · 11 open weekends · all 15 rated 4.5+ · 5 show a license
Data verified October 18, 2026
Delcore Electric
“Costs were where they should be and we will definitely bring using Del Core again in the future!”
Iconic Mechanical Services Corp.
“Very professional, and friendly service technicians with great customer service.”
Bonded Energy Solutions
“Bonded Energy Solutions came right away and literally fixed everything and helped me with money saving solutions and explanations no one could give and were patient in explaining everything they did and why to me.”
ALL Seasons Air Conditioning
“When the fan we needed for our system arrived, All Seasons sent them right over even though it was late in the day to immediately repair our air conditioning issue!”
Gallettair Inc. Heating & Air Conditioning
“He was honest and fair and deterred me from replacing my unit, which was my intention and instead he repaired it and explained what he was doing along the way.”
The 15 companies listed for Oyster Bay, 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: Oyster Bay, NY
The 15 companies on this page are rated from 4.6 to 5.0 across 7,419 reviews; 12 have 50 or more reviews. When customers rate these companies on specific qualities, they most often praise quality (86%), responsiveness (84%) and professionalism (83%). The topics that come up most in reviews of the companies on this page are "estimates", "cleanliness" and "efficient". 7 are open around the clock; 11 are open on Saturdays and 8 on Sundays. The services the companies on this page list most often on their websites are heating (2), hvac installation (2), hvac repair (2) and indoor air quality (2). 5 show a license on their websites; 1 lists staff certifications (NATE) and 7 have a BBB rating of A or A+. 11 have ten or more years of experience, the longest 88 years. 8 offer emergency call-outs; 7 offer financing or payment plans; 10 give free estimates; 9 are family- or locally-owned and 7 list coupons or special offers. We have a website on file for all 15 of the companies on this page; 14 publish a contact page; 11 list a public email and 2 take bookings online. 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 Oyster Bay answer no-heat calls at night?
Round the clock availability appears in 7 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.
Sal Manzo Plumbing
“They were neat and careful in getting the very heavy new cast iron radiator in to my house and when removing the old one.”
Stan Gelber & Sons
“Michael spent the time necessary to explain the various options, answered all our questions and made us feel very comfortable with the investment necessary to replace our equipment.”
Cool Clean Services
“The team was super friendly and detailed with the 5 units in my house.”
Tragar Home Services
“Steve and Dannys installation team did an amazing job installing our upgraded electrical panel and central air conditioning unit.”
Dashing Dan's Plumbing & Heating Inc.
“He was very knowledgeable, efficient and polite.”
ZAX Plumbing
“Brian, the owner, came to my house on a Sunday morning and promptly fixed the problem.”
Mastair-Works Mechanical
“He not only resolves issues efficiently but also takes the time to explain the problems and potential solutions, which has been incredibly helpful for someone like me who is not well-versed in HVAC systems.”
T.F. O'Brien
“Chris was on time and provided options available for what we are looking to do.”
Cool Pro Mechanical
“I called them right before Thanksgiving on something they didn't even put in and both the office manager and Eric, the owner, were so responsive and solved my issue.”
Why these companies made our list
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