Abstract: A heat ventilator for insertion in a flue pipe above stoves and the like, wherein a double walled connector spaces the ventilator from the stove and establishes an annulus heating air delivered into a housing by convection, there being a smooth-walled flue tube extending longitudinally through the housing establishing a passage occupied by a stack of spaced parallel plates transversely disposed and engaged over said flue tube to absorb and dissipate heat into useful air transported by a motor fan through a downwardly open plenum receiving useful air from around said stove and discharging the same over said plates and into a living area.