Abstract: A portable grate heater adaptable for use in a fireplace as a support for the material burned in the fireplace, as a means of supplying heat from the fire into the room adjoining the fireplace, and as a means of supplying fresh air to a fire on the grate. The grate is formed of a plurality of bent tubes of a shape to support logs mounted on a hollow chamber. Openings between the interior of the chamber and the tubes permits air in the chamber to circulate in the tubes, with the chamber fitted with an inlet and an outlet through which air from the room may be circulated. Valved openings are mounted on the forward end of the grate tubes for supplying air from the chamber to the fire.