Abstract: This invention provides an improved chamber within the can of a canned heat product that allows more complete combustion due to a better mixing of air and gasified fuel which eminates from fuel on the surface of a fibrous fill. This improved mixing is the result of pulling cold outside air into the outer annulus of the combustion chamber where mixing occurs prior to ignition and also cools the fuel holding fiber as well as providing a steady height point of maximum temperature due to the combustion.

Abstract: A portable or canned heat product is made where a liquid fuel is added to a filler made of bicomponent curled fibers with the fibers substantially oriented such that the axes of the fibers are parallel to the axis of a container holding these fibers and this filler and fuel provides an easy to ignite wick free heating device and a method to make ignition of a fiber surface easier.