About AJ Certified

Expert Heating System Repair in the North Metro Atlanta Area & North Georgia

AJ Certified is a highly acclaimed HVAC company specializing in installation, repair, and maintenance services. Our dedicated technicians strive to provide outstanding service that our customers can rely on. As a proud Lennox Premier Dealer, our HVAC experts are trained to deliver exceptional comfort and service that exceeds expectations. Known for our commitment to excellence, Lennox Premier Dealers are equipped to handle any comfort issues you may encounter. With NATE and Lennox certifications, our technicians rank among the best in the industry. We back our services with comprehensive warranties and a 100% satisfaction guarantee. Serving Metro Atlanta to North Georgia, contact our team today at (770) 334-9985 to discover more about our offerings and schedule your appointment!

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Customer Testimonials

What Our Clients Say

David Hales
David Hales
5 months ago
Service was okay but overpriced for the work done. Wouldn't recommend.
Richard Elijah
Richard Elijah
5 months ago
Tony's Water and Air Repair didn't fix the issue properly. Kept coming back with more problems.