When you call for service we don't send a salesman.
We'll present you with the ways you can save money in the long and short run.

Looking to replace your current HVAC system or building a new home? We sell and install Bryant, Lennox or Trane heating and air conditioning systems as well as geothermal and hybrid systems. When you need more than heating and cooling repair you can trust Sigman to fit your home or business with the right system for your needs. Trusted for two decades in Belleville, Edwardsville, Waterloo and O'Fallon Illinois and throughout St Louis and recognized for quality sales and installation and superior heater and air conditioner repair by Angie's List.

Not only do we provide trusted heating and air conditioning repair, we can also repair and install:

  • Water Heaters
  • Humidifiers
  • Air Cleaners
  • Fresh Air Exchange Systems
  • Wine Cellars
  • Ultra Violet Air Purifiers
  • Geothermal and Heat Pumps
  • Boilers
  • Radiant Heat
  • Programmable Thermostats
  • Zone Control Systems
  • Hybrid Systems
24/7 Emergency Service  
Talk to a live person all day every day - 618-234-4343.