A heater blower is a combined unit consisting of a fan, motor, and air heater. It is suitable for various types of workshops and can be used for recirculating air heating when the air contains no dust and no flammable or explosive gases. The heater blower can be used independently for heating purposes, typically to supplement the insufficient heat dissipation of radiators or to use radiators for standby heating, with the remaining heat load being handled by the heater blower.