warm air heater
A device that heats a room by blowing warm air; often used as a standalone unit or part of a heating system.
See also: 温風暖房
In winter, I use a warm air heater.
Refers to the heating method or system itself, while 温風暖房機 is the actual appliance.
Compound of 温風 (warm air), 暖房 (heating), and 機 (machine/device).