Whether your heating system has broken down in the middle of winter's chilliest night or you want your AC to work a little more efficiently this summer, you can always rely on the Air Alliance Team. Our heating and cooling contractors in St. Charles, MO and St. Louis, MO are experienced working with all types and brands of heating and cooling systems. The Air Alliance Team is made up of Sauer Cooling and Heating, A's Heating and Cooling and Bizelli Heating and Air Conditioning. Sauer acquired A's in 2013, and Bizelli in 2017, joining our employee staff together as one team. As a combined family of HVAC companies we have renamed ourselves the Air Alliance Team and are now better able to serve our customers.