Abstract: An improved heat exchanger containing a hollow cylindrical pipe casing having a plurality of apertures formed on the surface. A lower elbow pipe is secured to a stove outlet pipe and to the hollow cylindrical pipe casing. The lower elbow pipe functions to receive hot air discharged from a stove. A plurality of receiving elbow pipes are positioned within the apertures that are formed in the hollow cylindrical pipe casing that function to receive cool air from an outside source. A plurality of inner U-shaped pipes are positioned within the hollow cylindrical pipe casing and are secured to a corresponding receiving elbow pipe. Each inner U-shaped pipes is positioned within one of the plurality of apertures that is formed in the hollow cylindrical pipe casing. A plurality of outlet pipes are also contained in the device and are secured to a one of the corresponding plurality of inner U-shaped pipes. Each outlet pipes functions to release warmed air into a room.