Take Control of Your Comfort

Your thermostat is the “brain” of your heating and cooling system. With today’s smart thermostats and zoning devices, you can fine-tune comfort in every room while lowering energy bills. At A&S Nathan Heating & Cooling LLC, we install and configure advanced thermostat systems and HVAC zoning solutions that give you more control, flexibility, and efficiency.

Why Upgrade Your Thermostat or Add Zoning?

Better Comfort – Eliminate hot and cold spots by controlling temperatures in different areas of your home.
Smart Home Integration – Control your heating and cooling from your phone, tablet, or voice assistant.
Energy Savings – Modern thermostats learn your habits and optimize efficiency automatically.
Custom Scheduling – Program heating and cooling for your lifestyle.
Increased Home Value – Smart HVAC upgrades are attractive features for buyers.

Our Thermostat & Zoning Services

Smart thermostat installation (Nest, ecobee, Honeywell, and more)
Wi-Fi thermostat setup and integration with your HVAC system
Multi-zone HVAC system installation and zoning panel setup
Retrofitting zoning dampers for existing ductwork
Troubleshooting and replacing outdated thermostats

Why Choose A&S Nathan Heating & Cooling LLC?

Licensed & Insured Technicians – Proper installation for seamless performance.
Trusted Local Experts – Serving families across Fairfield, New Haven, and surrounding counties.
Upfront Pricing – No surprises—just straightforward service.
Financing Available – Affordable monthly options through Synchrony.

Service Areas

We proudly provide thermostat and zoning installation services across Connecticut, including:
Fairfield • Stratford • Trumbull • Shelton • Milford • Monroe • Newtown • Ansonia • Derby • Seymour • Orange • Beacon Falls • Bethany • Oxford—and beyond.

Upgrade to Smart Comfort Today

Don’t settle for outdated controls. Call (203) 555-1234 or click Book Appointment to schedule your thermostat or HVAC zoning installation with A&S Nathan Heating & Cooling LLC today.

Book an Appointment

We finally decided to switch to natural gas in our house and we were looking for a heating and cooling contractor to do it all! Gas in the house, furnace, central air and an on-demand w
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— Mark Pastor

I called A&S Nathan when the furnace in a home I was selling went and needed to be replaced asap to not jeopardize the sale. They responded immediately. The job was done quickly and
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— Colleen Scott

My AC stopped working during a heat wave. I called A&S Nathan Heating & Cooling LLC, and they were able to come within two hours to diagnose and fix my system. They are fast, re
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— Amanda Schaefer

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

Can’t say enough about this company. Awesome service from first call to fixing my AC. When all other local companies told me two weeks, A&S Nathan did the job immediately and
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— Matt Muccioli

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

My furnace kept going in and out on a cold day . Even though they couldn’t fix my old furnace (30+ years old) on the initial service call , the tech was very thorough in diagnosin
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— John Crowley

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 Anderson

Scott from A&S Nathan is my go to for issues with my home and local business. He is always quick to respond and provides top notch work. I trust A&S Nathan and recommend them fo
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— Michael Schmitt

We’ve been customers of A&S Nathan for some time so the decision to use them was easy when it came to replace our boiler. The process was easy and the installation was quick and s
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— Bridget Stronge

Highly recommend A&S Nathan Heating & Cooling LLC. Hot water tank sprung a leak over night. Called the office when they opened. Toni was a delight to speak with. Friendly and up
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— Kevin Marron

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