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.
A&S Nathan Heating & Cooling LLC Always answers the call with efficient and timely service. They came out on the coldest day of the year within 15 minutes to resolve my no heat— Christian Grohe
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A&S Nathan Heating & Cooling LLC provided service for my A/C system. Mark my service tech was professional and knows his stuff, he got my A/C working efficiently for the hot sum— Seamarre Swaby
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Great service, fast response, very proffesional service people— Harold Foodman
My A/C stopped working July 2, 2023. My friends recommended A&S Nathan. They promptly responded to my call and very quickly and efficiently repaired my unit. As the parts were under— Alan Davidson
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A&S Nathan is a great company, and I highly recommend them for any and all heating and cooling needs. From the office staff to the installation crew, everyone was respectful, profes— Rich Gelfand
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Really great job. The crew was here on-time, replaced the unit quickly, covered my hardwood floors to protect them, cleaned up and was so very polite and professional. We will continue— Mike Prete
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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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A&S Nathan has been great in the past servicing my Boiler, but this was the first time for my AC split system. Scott the service technician had and impressive knowledge of my AC uni— Doug Walz
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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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