Dor-Mar Heating & Air Conditioner Service | Call Today, Service Today Guaranteed



About Dor-Mar Heating & Air Conditioning

Proud to Serve Central Ohio Since 1962

A word from the owner, Steven K. Brewer

Dor-Mar Heating and Air Conditioning has been serving Newark, Columbus, Zanesville, and Lancaster, Ohio and the surrounding areas since 1962. Starting out as a small door-to-door company, Dor-Mar has grown to be one of the largest heating and cooling service companies in Ohio.

Dor-Mar is family owned and operated;  we hold our employees to the highest standards to ensure we provide our customers with the best HVAC service possible. We currently have more than 40 employees, all who are passionate about taking care of our customers’ needs. Our employees attend regular training, ensuring we keep up with the ever-changing HVAC field. As a result of our hard work and honesty, Rheem & Coleman has recently recognized us as a “ Top Team Contractor.” We offer free estimates on new equipment, and provide customers with 24-hour service.

Our ‘Humble’ Beginnings

My grandfather started our company in 1962, and my father ran it before me. We are a customer service-oriented company that focuses on reliable, friendly, lightning-fast service.

My grandfather, Frank A. Brewer, was a U.S. Navy gunner and served in WWII. He worked for Holland Furnace for 20 years before leaving to start this business in 1962.

Greg S. Brewer, my father, was second owner; he started the philosophy of helping youth athletics in our community. This year, we sponsored over 25 Little League baseball teams with donations and other support.

I started in this business as a young man, with my father putting me in crawl spaces to run ductwork while on summer vacation from school. I started working full time at the age of 19. I obtained my state commercial license at 25. I have three kids and a wife, and I love boating, fishing and hunting.

Our Commitment to the Highest Level of Customer Service

Dor-Mar Heating and Air is proud to install and service quality Rheem and Coleman products. We pride ourselves on providing exceptional customer service for all makes and models of heating and cooling equipment. 

Call us to schedule a service appointment or for a free, no-obligation consultation to determine the perfect system for your home or business. We look forward to hearing from you and adding you to our long list of satisfied customers. 

We offer same day no heat no cooling service/repair in  Newark, Zanesville, & Lancaster Ohio, and Columbus and surrounding suburbs. Call TODAY for service TODAY… or use our convenient online appointment request form.

We look forward to serving your family’s every heating and cooling need!

Dormar owner Steven K. Brewer

Steven K. Brewer

Owner, Dor-Mar Heating & Air Conditioning

Air Conditioning and
Furnace Repairs

Water Heater
Installation and Repair

Residential and
Commercial Service

Free Quotations

Certified & Licensed Technicians

Fast, Dependable Service

years in service
hour service
star ratings
branches in city

See what our satisfied customers have to say:

Brian was great! He called before coming to our house, very courteous, asking if 20 minutes was enough time. Arrived within time stated and took time to acknowledge/ pet our dogs, making them feel comfortable. He then went on to explain what he was doing, walked me thru the process as he went along and even waited to check results of his fix. He suggested a few extra services but was not pushy. Overall pleasant experience!"
Laken Ackroyd
"Robert came to clean our ducts today. He was able to come early & called before he came. He let me know what he was doing during the process & did a great job. He even cleaned the dryer vent! I recommend that anyone call & schedule a duct cleaning. You would never imagine how dusty they are! (Robert even showed me pictures of them!)"
Megan Miller
"Dor Mar came out today and serviced my A/C. Ron was the person who serviced it. He cleaned off all the build up throughout the years and told me every thing he checked was in good shape. when he was done he showed me how to keep my A/C unit clean through out the year. Ron answered all my questions. I was very happy with the service. Thank you Ron/Dor Mar for doing a great Job!!!!"
Bryan Hoops


Newark • 740.345.6639
Columbus • 614.238.6689
Buckeye Lake • 740.817.4058
Dublin • 614-.545.8939
Grove City • 614.595.3098
Pataskala • 740.564.6241
Reynoldsburg • 614.365.1579
Westerville • 614.381.1540
Zanesville • 740.454.2420
Marco Island FL • .239.382.7077
Naples FL • 239.376.1051"
Ft Myers FL • 239.376.1029

Many Locations

Buckeye Lake
Grove City
Ft Myers FL
Marco Island FL
Naples FL

Working Hours

24-Hour Emergency Service
Seven Days a Week

Angie's List logo
Rheem heating and cooling products


HVAC customer service in Newark, Ohio | Dor-Mar Heating & Air Conditioning

PLEASE NOTE: If you are a renter, please have your landlord/owner contact us directly to schedule service. We can only work with property owners.


Need a quick answer to a question? Enter your question below and we’ll get back to you with an answer. FAST!


Enter your contact information. Our Water Specialist will contact you within 24 hours to schedule your water test.


HVAC customer service in Newark, Ohio | Dor-Mar Heating & Air Conditioning


Our Comittment to Your Family’s Health & Safety

Learn what we’re doing to keep you and your family, as well as our employees, safe from the spread of the virus as we service your heating and cooling needs.