Abstract: An electric heater for warming the interior of cars, trucks and the like includes a relatively short cylindrical casing having a base end plate, an air intake end plate and a circumferential side wall. A motor driven fan is provided in the casing and arranged to draw air in axially through the intake for radial expulsion through discharge perforations in the side wall through 360.degree.. An electric heating element formed in a single length counterangulated to form inner and outer portions is arranged in the casing between the motor driven fan and the sidewall for heating the air prior to expulsion. The heating element is supported by a combined air deflector and support bracket extending 180.degree. within the casing. A guard strip supported by the bracket is provided between the heating element and casing side wall. A thermostatic control is situated in the casing between the fan motor and bracket so as to be shielded from the heating element by the bracket.

Abstract: A cylindrical valve body is secured within the body of the heater and includes a venturi inlet to reduce flow restrictions through the valve. A flexible flap valve spans the inner bore of the body at approximately 45.degree. so that it only has to be moved through 45.degree. to be fully opened or fully closed, and secured so that gravity aids in the seating of the flap valve in the closed position. A strip type retainer engages grooves in the side walls of a slot at the top of the body and engages the upper part of the flap valve and holds it in position when the valve assembly is incorporated in the heater and a projecting lug from the valve body engages an aperture in the heater body to position the valve assembly correctly relative to the heater assembly.

Abstract: A reservoir has an electrical heating element therein connectable to a power line and the reservoir is connected in series with a coolant carrying hose which in turn is connected to the coolant system of an automobile engine or the like. The reservoir is provided with an inlet connection and an outlet connection both situated adjacent the upper side of the reservoir. The inlet connection has a one-way valve allowing coolant in only, and includes a ball which has a specific gravity less than the specific gravity of the coolant so that the ball floats in the coolant and closes off the inlet connection when the coolant level is adjacent the upper side of the reservoir. The outlet connection has a one-way valve allowing coolant out only and includes a ball which has a specific gravity greater than the specific gravity of the coolant so that the ball normally engages the valve seat and is only displaced if and when the pressure of the coolant and/or the air in the air space above the coolant level increases.