Serving New Haven & Fairfield Counties
24/7 Emergency Service
Fully Licensed & Insured
Free Estimates & Financing Options
Est. 2000
Trusted HVAC Repair & Installation Experts
Serving New Haven & Fairfield Counties
24/7 Emergency Service
Fully Licensed & Insured
Free Estimates & Financing Options
Est. 2000
Oil. Gas. Propane. Heat Pumps. Air Conditioning.
We Service And Install It All!
A&S Nathan Heating & Cooling LLC is a family-owned business serving New Haven and Fairfield Counties for over 25 years. We specialize in HVAC service and installation, with a commitment to quality, reliability, and 24/7 emergency service. Free estimates and financing options available—your comfort is our priority.
SERVICES
Heating
Ensure your home stays warm and cozy with our expert heating services, providing reliable solutions for all your needs.
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Air Conditioning
Stay cool and efficient with our expert air conditioning services, ensuring comfort and savings all season long.
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Water Heaters
Enjoy consistent hot water with expert water heater services—heat pump, tank, and on-demand systems tailored to your home.
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Indoor Air Quality
Breathe easier with our indoor air quality services, designed to create a healthier and cleaner home environment.
Learn MoreWhy Choose A&S Nathan Heating and Cooling LLC?
Choosing A&S Nathan Heating & Cooling LLC means partnering with a team known for reliability, expertise, and trusted service throughout New Haven and Fairfield Counties. Established in 2000, we bring 25+ years of experience delivering quality HVAC service and installation backed by deep industry knowledge. We’re also an approved EnergizeCT contractor and part of the EnergizeCT Heat Pump Installer Network, helping homeowners take advantage of eligible heat-pump rebates and incentives.
As a local, family-owned business, we pride ourselves on personalized care and a strong connection to the community. Our HomeAdvisor Pro certification reflects our professionalism, and we’re honored to be the 2024 Pulse Award winner for Excellence in Customer Satisfaction. Trust A&S Nathan for dependable comfort—every season, every service.
- Service Contracts
- HVAC Service & Installation
- Installation, Repair, & Service—all fuel types
- Estimates Received Within 24 Hours
- Mitsubishi Preferred Diamond Dealer
- Pulse Award Winner
Ways To Save
At A&S Nathan Heating & Cooling LLC, we offer smart ways to make comfort more affordable. Save with flexible financing, manufacturer incentives, rebates, low-interest loan programs, and federal tax credits. We also provide preventative maintenance plans to help you avoid costly repairs, plus specials and exclusive offers throughout the year. Let us help you find the best savings for your home.
Brands We Specialize In
Navein
Bradford White
Weil-McLain
Thermo Pride
Rheem
Bosch
Riello
Boyertown
Regal
American Standard
Ruud
Utica
Burnham
Mitsubishi Electric
Peerless Boilers
Bock Water Heaters
Real Reviews. Real Customers.
Had A&S Nathan come out and service my in-laws house this week 11/5. Stew was the tech and did an excellent job! He was very professional, knowledgeable and a polite guy. He got the— Victoria Kondor
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I live in Florida and I needed to have my old heating system replaced in Stratford, Ct. I needed a company that I could trust to do the job. A&S Nathan Heating provided that. They w— Philip Michitsch
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A&S has been doing my heating and AC for many years now. Awesome and quick service, very professional, everyone knows their stuff! Al & Jake are very knowledgeable with all the— Mike Tecci
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I very rarely write a review for a company but this is my SECOND review for A&S NATHAN… From the office people to the techs themselves, there is always a feeling of family and pro— Martin Goldschmidt
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Mark came out and was professional, friendly, and helped out in a timely manner with a very reasonable price. Couldn’t ask for more! Highly recommend— Steve Pronechen
7pm on a Saturday night & my furnace goes out. Who did I call? A&S Nathan of course. The tech was there promptly. Clean & professional. I had heat in less than an hour. Th— Paul Harris
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I am completely satisfied with the way your company conducts its business. I am in the building industry as well and I know how important customer service is as well as the quality of y— Sue Marinko
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This company is fantastic. I had probably the worlds worst central air system installed by previous homeowners and after 6 years of finagling it finally called 3 companies. A&S was— Michael Thomas
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The tech that came to my house Was Mark very professional very respectful he can come to my home to service my unit anytime thank you Mark— John Zofcak
