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What is 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.

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.

State Licensing Requirements

A heating contractor must pass a state licensing examination prior to being able to work on a heating system. The exam is a test of the contractor’s practical knowledge of each of the system’s parts, their functions, and troubleshooting and repair strategies for heaters. Heating contractors must also know about mechanical codes or laws for their state, and most state exams test that knowledge. In Ohio, a service technician must apprentice with a licensed, experienced heating contractor for five years before he or she may apply for the licensing exam.

Of course, the idea behind state licensing is to protect the public from unscrupulous contractors or incompetent ones. After passing the test, the state grants a license to practice in the industry, working in the homes of the general public. A major responsibility that goes along with earning the license is strict compliance with the state codes and regulations.

Certifications for Heating Contractors

Many heating contractors obtain certification from the North American Technician Excellence (NATE), the most respected and widely regarded certification for the industry. Getting NATE certified requires attending classes and passing a rigorous series of written and practical exams.

Insurance Requirements

In Ohio, heating contractors are required to carry general liability insurance, business insurance, and workers’ compensation insurance. Liability insurance protects the customer from damages caused by the heating contractor while at their home. Workers’ Compensation protects the employees should an on-the-job accident or injury happen.

Every Ohio heating contracting company must have a license number issued along with their license, and should be displayed on the company vehicle, in advertisements, and on paperwork. Displaying the license number indicates that the heating technician works for a reputable company.

Customer Needs Come First

Our attitude is that a heating contractor must be willing to put their customers’ needs first. We must always maintain the highest level of professionalism during in-home visits; we consider it important that our service technicians explain, in layman’s terms, the work they are performing or that needs to be done.

Continuing Education is a top priority, as the equipment manufacturers are frequently updating and innovating heating technology. The service technician must also be able to guide the customer to make the correct choice for replacement equipment.

New Heating Equipment Installation

Another important part of the heating contractor’s job is to take measurements, perform calculations, and make recommendations for new equipment to meet the needs of the homeowner. It’s extremely important to get the right size, BTU, and efficiency level for the home correct.

Customer Relationship Are Important

We sincerely believe in building strong, long-term relationships with our customers. It’s one of the reasons our company has had the honor or serving so many thousands of customers since our company was founded in 1962.

Who is the Highest-Rated Heating Contractor in Central Ohio?

Knowing when to call is important, but knowing WHO to call when you need the best is also extremely important. Dor-Mar has been serving Central Ohio since 1962, including Zanesville, Newark, and Columbus and all of the surrounding suburbs. We have worked hard to service our customers, and our online reviews show it.

As an experienced HVAC professional, we recommend you have your systems checked and routine maintenance performed twice per year, once in the Spring (before cooling season) and once in the Fall (before heating season). It goes without saying the safety and comfort of your family or office staff are important factors. Keeping what is probably the most expensive and important system in your home (heating and cooling) properly maintained will help keep your biggest investment of your life in good shape.

Heating Contractor Dor-Mar Can Help

Our team offers a wide array of routine maintenance and emergency services for your heating and cooling system, allowing your family to breathe fresh, safe, clean air and be comfortable year-round. We also offer a number of add-ons to your HVAC equipment that can improve your home’s IAQ, such as electrostatic air filters, whole-house humidifiers, duct cleaning, and more.

Schedule an appointment for HVAC system troubleshooting or maintenance with us today by using our online contact form, or call one of our seven neighborhood offices listed below. We pride ourselves on our customer-focused service, and our reviews show it.

Dor-Mar…Your Climate Hero!




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

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


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