Furnaces Historical Data
Gas Warm Air Furnace

A self-contained gas-burning appliance for heating air by transfer of heat of combustion through metal to the air, and designed to supply heated air through ducts to spaces remote from or adjacent to the appliance location.

Oil Warm Air Furnaces

A self-contained oil-burning appliance for heating air by transfer of heat of combustion through metal to the air, and designed to supply heated air through ducts to spaces remote from or adjacent to the appliance location.

 

热热久久超碰精品中文字幕_国语自产拍大学生在线观看_秋霞2019理论2018年成片