WHY CHOOSE US? ABOUT BOLTON For over three decades, Bolton has gone above and beyond for the comfort of its customers across DeKalb County, Gwinnett County and beyond. When Georgia residents turn to our HVAC contractors, they can expect to get more of what they deserve. We offer personalized care, dependable HVAC services, elite fireplace and grilling products, outstanding efficiency and total peace of mind. And that’s just the beginning.