Replacement Fan for 100k Btu Fan Coil Unit

Replacement fan (motor and shield) for 100k BTU Fan Coil Unit Heater (part number 2900545).

Dimensions: 20-3/16" x 18-1/2" x 5-1/2" (see diagram)
Weight: 16 pounds
Fan Speed (cfm): Boost - 72, Medium - 51, Normal - 58.