Patent ID: 6045355
Filing Date: 2000-04-04
Classification: F23D

Abstract:
In a gas catalytic heater including a body, a catalytically active porous layer disposed within said body, at least one heat insulating layer containing fibers disposed below said catalytically active porous layer and a sealed plenum chamber having a wall portion facing toward said catalytically active layer wherein said wall portion contains a plurality of tiny, substantially equally spaced apart apertures having a diameter of between about 0.02 and 0.1 inch for the passage of a combustible gas therethrough, the improvement in combination therewith of a porous baffle member disposed between said insulating layer and said wall portion for distributing portions of said gas in a direction substantially parallel to said wall portion after passing through said aperatures, said baffle member also separating said wall portion from said insulating layer and prohibiting said fibers from entering and blocking said apertures to the passage of gas therethrough.