Patent ID: 7554063

Claim:
A heating apparatus comprising: a housing comprising an inlet aperture and an outlet aperture, the housing defining a volume of air therein; a heat generator comprising: an elongate tubular metal sheath extending between an inner end and an outer end; a resistive wire within the sheath; a substantially nonconducting material for electrically isolating the sheath relative to the resistive wire; the heat generator comprising a terminal portion at the inner end and a heating portion extending between the terminal portion and the outer end of the sheath, said terminal portion being adapted for connection to a source of electrical power; the heating portion of the heat generator being positioned in the housing to heat said volume of air; at least one insulator for electrically isolating said sheath relative to said housing; said at least one insulator comprising a body with at least one aperture therein wherein at least a part of said terminal portion is receivable; and the body of said at least one insulator comprising at least one sleeve coaxial with said at least one aperture for electrically isolating said terminal portion from said housing.