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.
Kyle came out in a hot Sunday and got our A/C working again in about an hour. Up in our hot attic and stayed pleasant and upbeat the whole time. Great guy, great service.— T Dillon
Heather was very professional and courteous and made sure everything was done to perfection. ⭐️⭐️⭐️⭐️⭐️— Meaghan Baye
Highly recommend! Reliable, convenient and trustworthy! Awesome technicians!!— Jennifer Gonzalez
A&S I would like to express my thanks and appreciate to A&S Nathan. My gas boiler gave up on us. They where recommend to me. The best recommendation ever. I called and they answ— Lourdes Valles
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Our technician Dave was incredible. I’ve done some plumbing myself but watching him work was a pleasure. He arrived on time, was skilled and efficient and patiently explained what— Maria Rubino
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Al Nathan went above and beyond to diagnose a problem with my duct work and a vent that was not working. He and his crew were professional and completed the work promptly and efficientl— Ony Sierra
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What a great company to do business with. Right from the first call to the techs doing the work. Mark, a tech also known as MD 20/20, is the man when it comes to hot air…(cold too— Michael Majewski
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Called A&S for no heat on Christmas Eve, they had someone at my front door in 25 minutes. The technician was knowledgeable and efficient and had my heat back up and running within a— Joe Szymansky
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Needed the furnace serviced before the start of cold season and customer service was great. Called and spoke with a nice woman who explained their pricing and deals (without being pushy— Theresa Hanson
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