Found in both M1 and MG furnaces, this combustion blower is a unit used in heating, ventilating and air conditioning equipment by allowing air to travel to the combustion to help the furnace run better.
Robert Shaw 6 Function 7200 ERCS-1. Left Outlet, Position #2 with full wave rectifier and slower opener. 1/2" Inlet X 3/8" Outlet. 0.2"-0.4" W.C. Step Pressure-NAT @90 FT3/HR.