Patent ID: 8107798

Claim:
A portable electric heater comprising: a housing; a substantially planar rear surface of said housing oriented substantially vertical relative to a horizontal support surface; a first interior space defined by said housing; an air inlet in said housing allowing air to enter said first interior space; an air outlet in an upper portion of said housing; a motor disposed within said first interior space, said motor having a shaft; an air impeller disposed within said first interior space and connected to said shaft of said motor, said air impeller in fluid communication with said air inlet and said air outlet; an exhaust air stream generated by a rotation of said air impeller; a second interior space disposed within said first interior space positioned between and in fluid communication with said air impeller and said air outlet, wherein said second interior space receives said exhaust air stream and prevents a substantial fluid communication of said exhaust air stream with said first interior space, said second interior space comprising: a rotatable plenum comprising; a side wall; a hot air exit in said side wall; a substantially horizontal axis of rotation about which said rotatable plenum rotates; an upper limit and a lower limit of rotation of said rotatable plenum; an electric heating element located proximate said hot air exit of said rotatable plenum; and a heated exhaust air stream formed by passing said exhaust air stream exiting said second interior space through said electric heating element, said heated exhaust air stream subsequently exiting said housing through said air outlet; wherein a direction of discharge of said heated exhaust air stream is adjusted vertically up and down relative to said horizontal support surface as said rotatable plenum rotates about said substantially horizontal axis of rotation between said upper limit and said lower limit.