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Heating and Air Conditioning

Ohio weather can be unpredictable.
There is no reason to not be comfortable in your home.
Let us help you get the best setup.

Plumbing Contractor

Have a plumbing emergency? Planning a remodel project?

Electrical Contractor

New Knoxville Supply Co. is a licensed full service electrical contractor.
Repairs to new builds, we are able to service all of your projects.

Water Furnace

Our incredibly efficient units
make it even easier to save on monthly bills.


New Construction

From an initial concept of a project to final product, we have the personnel to help you with every step of your project.


Home Remodel

Over time, your homes’ mechanical systems get a work out. When it comes time to take a look at renovating some of the areas of your home, we can help you with your projects.


Everyday Repairs

Issues with the mechanical systems of your home can pop up at any time. We are here to help. Call to schedule your service today.

We have the ability to perform electrical, HVAC and plumbing services for your new construction home projects. We offer a one stop shop service to help to make the process more streamlined.

Reliable and Local

Whether you need a routine maintenance check or an emergency repair on a heating or cooling unit, plumbing or electrical we are available to handle all your mechanical issues.  We continually strive to exceed expectations by ensuring that each client receives the very best service.

We will work with you to find HVAC solutions that fit your home. We will provide you with a full consultation to explain all your available options so that you can choose the system that is right for your home or business.

We serve both residential and commercial clients and offer a variety of money-saving solutions. We combine our use of the highest quality parts and equipment, and our dedication to delivering exceptional service to provide you with top quality service.

Reliable and Local

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Turn to Us for HVAC Services & Heating and Cooling Near St. Marys and Celina, OH

You need reliable HVAC services to ensure your property is comfortable throughout the year. At New Knoxville Supply Company, our local heating and cooling specialists providing fast, durable, and effective HVAC solutions for homes and businesses throughout St. Marys and Celina, OH. We’re also local electricians and plumbers to provide you with the reliable services you need to keep your home’s systems functioning well.

Count on Our HVAC Professionals

When you contact us for your air conditioning and heating needs close to St. Marys and Celina, OH, you can rest assured you’ll get the quality service you deserve from highly-trained and certified technicians who put your safety and comfort first. We provide all the HVAC services you need, including installation, maintenance, and repairs, so you can count on your system to work as intended. Whether you’re building a new home or business or you need repairs or maintenance on your existing system, our team is standing by to provide the prompt, unparalleled service you deserve.

We’re Also Electricians and Plumbers

In addition to HVAC services, you can count on us to serve as a residential electrician or commercial electrician. Whether you need to install home generators, a geothermal unit to save money, or require other electrical services, our qualified team provides safe, reliable service you can rely on. We’re also local plumbers to keep your plumbing system running efficiently.


Our promise to our customers.

You can count on us to be on time, professionally dressed, and prepared to get right to work. We even wear shoe covers, put down drop cloths, and make sure to clean up before we leave. From our cleanliness to our experience to our dedication in ensuring your satisfaction, there is no reason not to turn to New Knoxville Supply.

We’ve Been In Business For Over 90 years

Reliable and local. We have been serving our local communities for nearly a century. We continually strive to exceed expectations by ensuring that each  client receives the very best service.