6 mm BTU, air heater powered by natural gas. With Blower, Gas train and heater installed on skid. Skid dimensions are 193" long x 61" wide x 74" high. Air inlet is rectangular flange 15" x 11". Air Outlet is round 19" diameter. Complete automated fuel train by, with series 2300 turbo blower. Originally used in line with a Williams pulverizer - see IPP Stock number 221292.