Dor-Mar Heating & Air Conditioning | Central Ohio's Most Reliable HVAC Company
HVAC customer service in Newark, Ohio | Dor-Mar Heating & Air Conditioning
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Heating and Air Conditioning Service Nearby

Air Conditioning Installation
Air Conditioning
Newark Heater Repair
Heat pump repair, replacement, installation
Heat Pumps
hot water tank installation
Water Heaters
Thermostat installation & Repair
air cleaner, indoor air quality
Air Cleaners
HVAC Routine Maintenance Agreements
HVAC Maintenance
Radon Gas Remediation
RADON Gas Remediation

Why Choose Dor Mar
Heating & Air Conditioning in Granville, Ohio?

Since 1962, Our Customers Have Been Experiencing Our Fast, Friendly Service

Fair Pricing

You can be sure the price you're paying for repairs, maintenance or new equipment installation is a fair price in your local market.

24/7 Service

Our offices are open during regular business hours, but you will always speak to a real person if you have an after-hours no-air or no-heat emergency!

Qualified HVAC Experts

Our service technicians are NATE-certified and receive ongoing monthly training. You can count on getting the right answer for your heating and cooling questions.

Heating and Air Conditioning Service, Repair and Installation Services You Can Count On

Serving Granville Ohio and Licking County Since 1962

Meet the Team | Granville Ohio HVAC professionals
Meet the Dor-Mar Team | Granville Ohio Professional HVAC service technicians, installers and customer service representatives

HVAC Contractor

Dor-Mar is one of the highest rated HVAC contractors in Granville Ohio. In business since 1962, we consider our customers the most important part of our business, and it shows in our online ratings.

What does an HVAC Contractor  do?

An HVAC contractor is a business whose service technicians are tasked with installing, maintaining, and repairing heating, ventilation and air conditioning systems. In the state of Ohio, a professional license is required for a company to perform these services. Learn More About HVAC Contractors

Heating Contractor

One of our primary services is to serve Central Ohio’s needs as a Heating Contractor. The job of a heating contractor is to install, repair and maintain heaters, ventilation systems, and air conditioners. This includes associated equipment like ductwork, thermostats, furnaces, heat pumps and boilers. Some heating contractors offer additional services like performing energy audits, cleaning ductwork, installing indoor air quality equipment, or sealing ductwork.

The Best Heating Contractor Keeps Your Family Comfortable

If your heating equipment breaks, or is in need of any type of maintenance, repair, or replacement, a heating contractor is the right professional to reach out to. Find out more about Heating Contractors

Heating Equipment Supplier

In addition to maintaining and repairing heating equipment, furnaces and heat pumps, Dor-Mar offers replacement equipment. When it’s time to replace your heating equipment, it’s just as important to choose the right equipment supplier or installer as it is to choose brand, BTU, efficiency, and other elements of your system. If you are spending money to repair a heater that’s more than 10 years old, it might make more sense to replace it with a new, more energy-efficient furnace. Undoubtedly, the new system will use less energy simply because newer units include improved technology. Central Ohio’s Top Heating Equipment Supplier

Furnace Repair Service

Dor-Mar Heating and Air Conditioning is an award-winning Furnace Repair Service in business since 1962. We’ve been providing professional, timely heater repair and maintenance services to central Ohio since 1962. Our certified and highly-trained furnace technicians are ready and available around the clock to quickly respond to your lack of working heat. Our goal is to get your family back to comfort as quickly as possible.

24/7 Furnace Repair Availability

Our expert HVAC team is available during regular business hours, all night/every night, on weekends, evenings, and holidays, to provide quick access to the area’s top furnace repair service at a reasonable cost. Get Expert Furnace Repair Service

Fast, Reliable Air Conditioning Repair Service

Dor-Mar Heating and Air Conditioning provides expertly trained and EPA-certified technicians to perform fast and reliable repairs to residential and/or commercial air conditioning systems. We service all major brands, providing A/C repairs, heat pump repairs, and central air conditioning repairs.

We can perform repairs on many types of air conditioning systems or A/C parts, including:

  • Air Conditioning Repairs
  • Emergency Air Conditioning Repairs and Service
  • 24/7 Air Conditioning Repairs
  • Heat Pump Repairs
  • Ductless AC Systems
  • High Velocity AC Systems
  • Central Air Conditioning units
  • Compressor Repairs
  • Freon or Puron coolant leak repairs
  • Emergency A/C repairs
  • Air Conditioning Zoning
  • A/C Tune-Ups and routine maintenance

Our team’s AC repair expertise includes all major makes and models of central air conditioning and heat pump systems. Whether your AC equipment is old or new, if you’re looking for a minor or major repair, routine maintenance, or a complete replacement, Dor-Mar Heating and Air Conditioning is the company to call. Find out more about Dor-Mar’s Cooling Repair Services. Get Expert Air Conditioning Repair Service.

Central Ohio’s Highest-Rated Air Conditioning Contractor

Air conditioning contractors install, repair, and maintain the central air conditioning equipment, ductwork, electrical equipment, and controls found in residential and commercial cooling systems.

Did you know that most consumers view online reviews as reliable as a personal recommendation? There are a number of review websites where you can read detailed descriptions of a particular homeowner’s experience. Often these sites also have a 1-to-5 star rating system. Look for a high review count (meaning the company has been around for a while or service a large number of customers) and a high average rating, no less than 4.5 stars. You can also see if the company is actively paying attention to, and responding to, consumer reviews.

Dor-Mar Heating and Air Conditioning has accumulated more than 1,000 reviews and has an average rating of 4.83 stars on Google. We make it a point to respond to every review, positive or (the rare) negative review. If something went wrong, we work to make it right.

Contact the most trusted Air Conditioning Contractor in the Central Ohio area.

Air Conditioner Installation and Replacement

As your old A/C system deteriorates with age, it must work much harder to cool the air inside your home. This means it’s necessary for it to consume more energy to deliver the desired temperature. When you consider this and the significant difference in the energy efficiency of current air conditioning systems versus those manufactured only 15 or 20 years ago, it’s easy to see how switching to a new, state-of-the-art system will represent substantial savings on your energy bills.

Installing a new air conditioning system is not a job for a weekend warrior. The installation must be completed in accordance with local and state building codes and following the manufacturer’s specifications in order to protect your warranty. The job demands a licensed and trained professional like the ones at Dor-Mar Heating & Air Conditioning.

Contact us for a free estimate for replacement air conditioning equipment.

About Dor-Mar

Dor-Mar Heating & Air Conditioning has attained a track record as Granville’s most reputable, trustworthy HVAC contractor. With offices and service technicians on call throughout the metro Columbus, Newark and Zanesville areas, we bring courteous, family-oriented service to your home, oftentimes the same day.

Beginning as a small door-to-door company, our family owned and operated venture has grown to one of the premier heating and cooling service companies in Ohio. We hold our employees to the highest standards to provide our customers with the absolute best HVAC service possible. Our 30+ employees are passionate about taking care of your needs in the speediest, friendliest, most efficient manner possible. Our service technicians, installers, customer service representatives, office personnel and management attend frequent training sessions, ensuring we stay in front of updates in the ever-changing HVAC industry.

As a result of our effort and dedication to customer care, Rheem & Coleman recently acknowledged us as a “Top Team Contractor.” We offer free quotes on new equipment, and provide homeowners with 24-hour professional service.

Call Dor-Mar Heating & Air Conditioning to arrange a service appointment for your home’s air conditioner, heat pump or furnace, or for a free, no-obligation consultation to determine the perfect system for your home or business, regardless of size.

We anticipate adding you to our long list of delighted customers in the Granville, Ohio area.

Rheem heating and cooling products

See What Our Happy Customers Are Saying…

We've been satisfying loyal customers since 1962.

"I'm truly amazed with my experience with Ron and this company. My a/c went out on some of the hottest days to date. I have two small children. And Ron seemed genuinely concerned about their welfare and getting us up and running. He explained what the part did and why I needed it in a way that I could understand. Got us fixed at an affordable price. Which is rare in today's money grab. Ron's the man. Thanks again."
Nate J
"We have been Dor Mar customers for a long time and have always had good service. Most recent experience was very positive as Dor Mar replaced, at no charge, a damaged/defective part that was installed over a year ago. Gary was in and out in no time at all and did a very good job. Also positive shouts out to Willie and Stone who have always gone above and beyond."
Tom T
"Dor-Mar has provided heating, air-conditioning, and hot water heating installation and periodic maintenance services at my mother's condo for more than 10 years. In all cases, Dor-Mar's technicians have been friendly, competent and courteous, and Cindy has done an outstanding job scheduling these services."
Richard H

7 Locations

More offices mean we can dispatch one of our certified service technicians to your door quickly.

24/7 Service

Our offices are open during regular business hours, but you can reach our dispatch person 24/7. We are there when you need us!

Local Numbers

Never a toll call or long distance charge. Our phones and highly-qualified service techs work at YOUR location.

Local Reviews
for Granville, OH

Dor-Mar Heating & Air Conditioning Rated 4.9 out of 5 stars based on 109 customer reviews

Map of Granville, OH 43023


Review of Dor-Mar Heating & Air Conditioning

We just moved into our new home, and of course the hot water stopped working. We had never used Dor-Mar before, but had seen their vans around the area. We called in on Saturday morning and our technician was here within the hour. Our technician, Dave, was nothing short of amazing. We were so happy with the service that we signed up for their maintenance package on the spot. Thanks to Dor-Mar and Dave for such a wonderful experience.

GranvilleOH43023 40.06-82.5225

Map of Granville, OH 43023

Excellent service

Review of Dor-Mar Heating & Air Conditioning

Caleb was experienced , detail oriented and did a thorough job cleaning the heating ducts . Very impressed !

GranvilleOH43023 40.0675-82.525

Map of Granville, OH 43023

Great service

Review of Dor-Mar Heating & Air Conditioning

Elizabeth was punctual well informed and clearing explained water softeners and water purifiers . Tested our water and answered questions related to the product it’s costs, benefits and maintenance . Very pleased.

GranvilleOH43023 40.0675-82.525

Map of Granville, OH 43023

Appointment Time

Review of Dor-Mar Heating & Air Conditioning

Scheduling time slots needs to be clarified and specific, especially for jobs taking 3 to 4 hours. Dor Mar tells the customer that they have the first appointment of the day, 8:00AM, then an email confirmation arrives noting that the appointment is anytime between 8 and noon. That is unacceptable. If you tell me I have 8AM, then confirm 8AM and be there at 8AM. I have had to call the last 2 appointments to find my technician and get him to the house at the promised first time of the morning.

GranvilleOH43023 40.0625-82.4825

Map of Granville, OH 43023

Excellent Service!!!

Review of Dor-Mar Heating & Air Conditioning

Great service, we would like to have David as our tech moving forward.

GranvilleOH43023 40.03-82.5025

Map of Granville, OH 43023

Excellent service

Review of Dor-Mar Heating & Air Conditioning

On time, jumped right on the project, worked right thru lunch not taking a brake. Cleaned up after job was done. Very good job

GranvilleOH43023 40.0625-82.495

Map of Granville, OH 43023

Excellent service!

Review of Dor-Mar Heating & Air Conditioning

GranvilleOH43023 40.0825-82.4925

Map of Granville, OH 43023

Technician was friendly and professional. Performed the work quickly and efficiently.

Review of Dor-Mar Heating & Air Conditioning

Adam did a great job. He was courteous, professional, and knowledgeable.

GranvilleOH43023 40.005-82.525

Map of Granville, OH 43023

Great experience

Review of Dor-Mar Heating & Air Conditioning

Very good service and workmanship!

GranvilleOH43023 40.065-82.495

Map of Granville, OH 43023

Great service

Review of Dor-Mar Heating & Air Conditioning

Very polite and professional

GranvilleOH43023 40.025-82.5975

Caleb L.

Caleb L.

Air duct cleaning

Near Columbus Rd, Granville, OH 43023
Caleb L.

Caleb L.

Air duct cleaning

Near River Rd, Granville, OH 43023
David A.

David A.

Furnace Diagnosis

Near E Elm St, Granville, OH 43023
David A.

David A.

Furnace Diagnosis

Near W Maple St, Granville, OH 43023
Caleb L.

Caleb L.

Dryer vent cleaning

Near Granview Crossing, Granville, OH 43023
David A.

David A.

Tankless water heater diagnosis

Near Lancaster Rd, Granville, OH 43023
Caleb L.

Caleb L.

Air duct cleaning

Near S Plum St, Granville, OH 43023
David A.

David A.

Furnace Maintenance

Near N Granger St, Granville, OH 43023
Caleb L.

Caleb L.

Whole Home Duct Cleaning & Dryer Vent Cleaning

Near Cambria Mill Rd, Granville, OH 43023
Elizabeth A.

Elizabeth A.

water Treatment Service

Near S Plum St, Granville, OH 43023


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.


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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.