Professional Heating Installation in Connecticut

Ready for a new heating system? At A&S Nathan Heating & Cooling LLC, we specialize in installing furnaces, boilers, heat pumps, and ductless systems that keep your home comfortable and efficient—no matter how cold it gets outside. Whether you’re replacing an outdated unit, upgrading for better efficiency, or switching from oil to gas, our licensed team will get the job done right.

Why Choose Us for Heating Installation?

Expert System Sizing – We’ll recommend the best system for your home’s size and heating needs.
Energy-Efficient Options – Save money with high-efficiency models and modern technology.
Oil-to-Gas Conversions – Make the switch to a cleaner, more cost-effective fuel source.
Heat Pump & Ductless Solutions – Flexible options for all home types and comfort preferences.
Licensed, Insured & Trusted Locally – Serving Connecticut families with reliable HVAC service.
Financing Available – Affordable monthly payments through Synchrony.

Our Heating Installation Services

Furnace installation (gas & oil)
Boiler installation
Heat pump installation
Ductless heating systems
Thermostat upgrades & zoning
Oil-to-gas conversion services

Service Areas

We provide heating installation throughout Connecticut, including:
Fairfield • Stratford • Trumbull • Milford • Shelton • Monroe • Newtown • Ansonia • Derby • Orange • Seymour • Beacon Falls • Bethany • Oxford—and surrounding areas.

Upgrade Your Home’s Comfort Today

Don’t wait until your old system fails—plan ahead with a professional heating installation from A&S Nathan Heating & Cooling LLC. Call (203) 555-1234 or click Book Appointment to schedule your free estimate today.

Book an Appointment

Prompt free quote, honest guidance on what the best repair/replacement would be. The crew that installed our new boiler was professional and courteous.

— chris sauro

Big shout out to A&S Nathan Heating. No heat on a cold morning in a new house with an old boiler.

— Judy

We have used A&S Nathan for years to service our oil burner and our air condition. They also installed a ductless AC in our first floor which we love. We decided to update our heat
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— Laurel Sorrentino

Called A&S b/c furnace had been running rough for months. Scott & Robert were extremely easy to work with, professional, & very polite. Scott was very knowledgeable and to
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— Charles Ramik

I had my first experience with A&S Nathan HVAC on April 29, 2025. Making the appointment was a breeze. Received cordial service over the phone. On the day of the service (tune-up an
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— Daria

I have been a customer of A&S Nathan for several years. Scott always does a great job with my annual oil furnace tune up. Scott always goes above and beyond and patiently answers al
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— Alessandro Lopes

I had an issue, I called and I got through to the office manager heather .

— Jorge Lopez

Such a wonderful staff!!!

— M M

We called for a broken air conditioner and they were at our house in no time to fix it. The man who fixed our air conditioner was very friendly and professional. I think his name was Sc
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— Donna Scott

Very timely response. Luke was thorough and very personable. Will definitely use again.

— Elizabeth Ferrari

A&S Nathan was easy to schedule, timely and professional. I was very pleased with their services!

— Marlene Piscioniere

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