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 are truly professional. They’re the only company that responds quickly and is on site to make repairs when needed. The technicians are kno— Brian Fandetti
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Dan the Technician was extremely efficient. So much so that in the future I will request him. Very meticulous , informative , pleasant, and resolved our issue.— Joe Slane
We have used a number of HVAC companies over the years and A&S Nathan is by far the best. They respond quickly, identify issues quickly, and the price is right! Not to mention every— Amy Joyce
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Tech Mark was just here to do a checkup on furnace and AC. He was punctual and very knowledgeable. He answered all my questions. I am in a wheelchair and cannot get into my basement.— janet c
very happy with them !— christina scappini
We have been using A&S Nathan for several years for yearly furnace cleaning and this was our first need of emergency furnace service. On 9/23, I called A&S Nathan at 913am as ou— kathy scholz
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Woke up this week to a freezing cold house and a non-functioning furnace. We heard about A&S Nathan Last year from friends, how happy they were with the service.— Patti Iannucci
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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I cannot say enough about A&S Nathan response time, service quality and pricing, who came to my rescue during the hottest week of the summer (so far). Our AC went out on Sunday nigh— Mary Duffy
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