Residential and commercial HVAC repair, replacement and installation

Why should you choose R&S McKay?

We have over 20 years of experience backing our guaranteed service and dedication to your heating and cooling needs. 

We are here to help.

We offer financing options for qualified customers. 

Residential Service

Keeping your house cool in the summer and warm in the winter is one thing we all want from our home. We also don’t want to have to pay an arm and a leg to do so. Preventative maintenance and a reliable unit will help do just that!

Commercial Service

The professionals at R&S McKay are available for emergency repairs, and with our preventive maintenance services, such as annual tune–ups, you can help prevent repairs and equipment failure.

Service you can trust.

With and A rating from The Better Business Bureau, you can rest assured we will handle your HVAC needs with respect and professionalism.

Welcome to the website of R&S McKay, the premier Lawrenceville heating and air conditioning contractors. In addition to being the best heating and cooling company in Lawrenceville, we also serve the greater Atlanta area. We use our 20 years of experience in heating and cooling to help solve your heating and plumbing problems quickly, efficiently and professionally.


R&S McKay is your local go-to experts for HVAC services. We pride ourselves on our reliability. If you call us with an emergency, we do our best to get to your home or business as quickly as possible. Need to set an appointment around a tight work schedule? No problem—we’ll be there at the time of the appointment. We are truly dedicated to providing top quality services to all our customers.


In addition to taking care of our customers with our services and commitment to quality, we also help make your heating and cooling costs easy on the wallet. If you’d like us to install a new heating unit or air conditioner, we offer financing options for qualified buyers. If you have questions about financing, please feel free to give us a call. We’ll be happy to answer any questions you might have.


We’re one of the top companies in the Atlanta area for HVAC installation. If you need a new heating unit or air conditioner for your home or business, our experienced HVAC professionals can install a new system and have it heating or cooling your house in no time. For instance our AC contractors in Lilburn can install a brand new system in a short time so there is little disruption to your schedule.


From air conditioning installations to emergency AC repairs, we offer a wide selection of services for your residential or commercial air conditioning. During hot weather, it can get very uncomfortable very fast if your air conditioning isn’t working. R&S McKay understands this, making your AC repair our top priority.


Part of a successful air conditioning service is the yearly maintenance service. At R&S McKay we know that consistent upkeep and cleaning on a system are one of the best things you can do to keep your system in great shape, and to save you money. Regular maintenance greatly reduces the possibility of emergency calls in the future.


If you have heating system problems or need AC repair in Lawrenceville, give us a call. We’ll make sure the problems is fixed with maximum efficiency and with a minimum of fuss!