The VTH electric heater combines a hemispherical heating element array with a mounting strategy at the blower inlet. The patented design uses the Venturi effect to draw air through the heating element via the blower inlet before it enters the discharge airstream. The VTH’s four-bolt mounting design is combined with quick-disconnect electrical terminals for easy maintenance or replacement accessibility. Complementing the hemispherical design, the VTH includes a single-plane heating-element array mounted entirely across the blower’s opposing inlet not obstructed by the blower or motor shaft.