Air Doctors and NK Mechanical is a renowned full-service commercial, industrial, and residential heating, cooling, refrigeration, and plumbing contractor based in Middle Tennessee. With an unlimited licensed and bonding capacity, we have been providing unsurpassed HVAC, kitchen equipment, and refrigeration systems maintenance for over 35 years. Our engineering design-build team is capable of designing for any type of application, large and small, within realistic budgets and schedules. From the most complex commercial and industrial refrigeration systems to commercial kitchen installations and basic residential heating and cooling units, your system is critical to you. At Air Doctors, we have the expertise and the responsiveness you can rely upon and trust - and we genuinely care about being a part of a successful formula for your heating and air conditioning needs.
Our Services
Our commercial and industrial customers, especially owners of proprietary or custom systems, often have detailed scheduling requirements and require high performance under high pressure and time-limited situations. They're in good hands with Air Doctors. Our services include off-the-shelf and custom installation, repair, and maintenance for the following:
- Air Conditioning and Heating Systems (up to 130 tons)
- Refrigeration Systems and Coolers
- Cooling Towers and Pumps, Pneumatics and DDC Controls
- Computer Room Systems
- Exhaust /Makeup Air Systems
- Boiler Systems
- Building Automation
- Ice Machines
We specialize in using preventive maintenance to help you reduce your costs and increase your confidence as well as speedy response times and the highest technical competence. Our team of expert technicians is always available on demand for service and repairs, and we use our expertise to help you create an effective preventive maintenance program tailored specifically to the needs of your business.
In addition to providing responsive technical expertise, we make sure to keep a clean work area and treat your stakeholders and your business with the utmost respect. We know it is important for the service provider you choose to be a credit to your business. And to make things easy, we'll work within your purchase order, work order, billing, and other purchase and accounting systems however is most convenient for you.
If you choose Air Doctors, you'll experience the benefit of working with us on an immediate and a long-term basis through greater responsiveness, lower cost of your HVAC and/or refrigeration operations, and better planning and decision-making. We invest in a long-term relationship with you, and we start by promising that you will always understand the benefit of any dollar you spend on your HVAC and/or refrigeration systems.
Residential Services
At Air Doctors, we understand that your home is your sanctuary. That's why we provide the highest level of customer service and technical expertise for the maintenance, service and installation of your heating, air conditioning, and refrigeration systems. We specialize in using preventive maintenance to help you reduce your costs and increase your confidence as well as speedy response times and the highest technical competence.
Our team of expert technicians is always available on demand for service and repairs, and we use our expertise to help you create an effective preventive maintenance program tailored specifically to the needs of your home. We specialize in the following residential services:
- Air Conditioning and Heating Systems (up to 130 tons)
- Refrigeration Systems and Coolers
- Cooling Towers and Pumps
- Computer Room Systems
- Exhaust /Makeup Air Systems
- Boiler Systems
- Building Automation
- Ice Machines
We understand that the service provider you choose to enter your home should be trustworthy and respectful. That's why we treat your home with the utmost respect and make sure to keep a clean work area. We are committed to ensuring your complete satisfaction.
Why Choose Air Doctors?
At Air Doctors, we pride ourselves on our long-term relationship focus. We help you make the right choice for YOU, weighing all considerations of the true costs associated with your system. And we promise that you will always understand why you are spending the money that you spend with us. We respect our customers and appreciate their choice to trust Air Doctors.
Our commercial and Industrial customers, especially owners of proprietary or custom systems, often have detailed scheduling requirements and require high performance under high pressure and time-limited situations. They're in good hands with Air Doctors. Please read the testimonials from our customers to see how they feel about their relationship with us.
To learn more about our commercial, industrial and residential services, please call us at (615) 242-1230. Thank you for visiting our website.

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