A heater is an energy conversion device that inputs energy into the heater in the form of chemical energy from fuel, electrical energy, and thermal energy from high-temperature flue gas. After being converted by the heater, it outputs warm air, hot air, and high-temperature air with a certain amount of thermal energy. A heater consists of two main parts: a combustion system and a fan. The combustion system generates enormous heat, which is then blown out by the fan.

Household gas heater is a device that uses gas (such as natural gas, liquefied petroleum gas, etc.) as energy to heat water, thermal oil, etc. It is commonly used in household, commercial, and industrial fields, providing centralized heating, hot water supply, cooking, and various other applications.