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 Whether you’re replacing an outdated unit, upgrading for better efficiency, or switching from oil to gas, our licensed team will get the job done right.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

Jake provided us with a detailed estimate with options and talked us through it so we could understand how best to match our needs.

— Sarah Duff

A&S Nathan replaced the seised blower motor in my funance that is also used for my central A/C. Diagnosed the issue found a new replacement locally, picked it up and installed it, t
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— Robert Steller

The crew did an excellent job during my conversion from oil to propane. The work was of the highest quality and they completed it in a timely and organized manner.

— Francois Polica

Of course A/C always breaks on the hottest most humid day of the summer. I have not previously been a customer and called based on the recommendation of a friend. I left a request on th
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— John S

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

Great team, the boiler installation went very smooth with very little interruption of heating to the house. the mechanics were very professional and organized. communicated every aspect
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— Javier Ramirez-Brito

Every time I have had a furnace or hot water issue in my house, for the last 10 years the team at A&S Nathan has been so quick to resolve it, with professionalism, attention to clea
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— Elizabeth Lee

Our 94-year-old steam boiler failed losing all of its water and becoming totally inoperable. We never used A&S Nathan Heating & Cooling LLC before but decided to give them a try
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— Joseph Papeika

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

Had Mark at my house for service. Up and running better than ever.

— Kevin Mosman

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