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 Whether you’re replacing an outdated unit, upgrading for better efficiency, or switching from oil to gas, our licensed team will get the job done right.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

I had Mark from A&S Nathan come to my home for a repair. I can not say enough great things about his service. He was super friendly and knowledgeable making me feel comfortable.

— Michael Eaton

Craig came to service our furnace and he was excellent. He identified an issue we were not aware of, explained it thoroughly and took care of it. We recently moved into our home and the
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— Ashley Boutagy

We had several things done/installed in one day. Ian was fantastic coordinating the entire project. Then he took time to explain everything to us. Heather in the office is so accommodat
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— linda hooper

We used A&S Nathan to replace our Water Heater that wasn’t venting properly. During the estimate, Jake explained my options and recommended an On Demand water heater. I am ext
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— Mark A

We had our AC system replaced this year. The A&S team was on time, professional and polite. They got the job done within the timeframe they estimated, they shared honest feedback on
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— Deb Ferreira

Thank you to David and his team who came out quite early on a bitter cold and snowy day. Our boiler stopped working on Sunday and they were able to come on short notice to get it up and
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— Maria Esteves

What a great company is A&S Nathan The technician was knowledgeable in his work. Very efficient and quickly gave me heat in upstairs bathroom!! He was polite efficient and knowledge
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— Sandra Mirsky

I just wanted to say is on Friday October 31, 2025 we needed service done on our oil burner. Your technician Mr Craig & I forgot the other gentleman name. They did an awesome job do
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— Abtin Nejad

A&S came out to install a new A/C condenser and air handler in my home. They arrived on time, covered my wood floors with drop cloths and worked hard all day in the extreme heat. Th
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— Lori Marco