Heating and Cooling Services from SMS

Southeastern Mechanical Services is a family-owned, husband-and-wife HVAC company based in Decatur, serving homes and businesses across North Alabama for more than 12 years. We repair, maintain, and install heating and cooling systems, and our technicians are trained service techs, not commissioned salespeople. Choose a service below, or call 256-686-3444. Our phones are answered live, 24 hours a day, 7 days a week.

AC Repair

Air conditioner not cooling or blowing warm air? We find the problem and give you repair options first. Learn more

Furnace Repair & Replacement

Gas furnace repair, replacement, and installation, with a written quote every time. Learn more

Heat Pumps

Heat pump repair, service, installation, and replacement for York and Mitsubishi systems. Learn more

Ductless Repair & Service

Leaks, error codes, and cleaning for ductless mini-split systems. Learn more

Mitsubishi Ductless Installation

Ductless heating and cooling for garages, bonus rooms, and additions from a Mitsubishi Elite Diamond Contractor. Learn more

Indoor Air Quality

Whole-home air purifiers and better filtration through your existing system. Learn more

Spring & Fall Maintenance

Seasonal tune-ups that catch problems early. No contract required. Learn more

Thermostats

Thermostat replacement and troubleshooting. Learn more

Commercial & Industrial HVAC

Rooftop units, ventilation, process chillers, and scheduled maintenance. COI on request. Learn more

Why Homeowners Call SMS

  • Family owned, husband-and-wife team.
  • No commissioned sales technicians and no high-pressure sales.
  • Honest evaluation with repair options, not automatic replacement.
  • A written quote that shows exactly what is being installed.
  • Authorized York dealer, Mitsubishi Elite Diamond Contractor, and TVA Quality Contractor Network member.

Need a new system? See heating and air conditioning installation in Decatur.

Where We Work

Decatur is our home base. We also serve Hartselle, Priceville, Trinity, Somerville, Austinville, Eva, Athens and all of Limestone County, Cullman, and the Smith Lake area. See our full service area.

Not Sure What You Need? Call SMS.

Call 256-686-3444 or request service online. Tell us what is going on and we will point you in the right direction.