interleaved with a multi stage stator 30 pumps ambient air through each stage in a path that flows radially outward through impeller vanes 27 against a stator wall 32 where the air is retroverted and directed radially inward through a stator passageway 36 to the next rotor impeller 21 flow through each stage increases air temperature so that the output air in addition to being blown forcibly enough to pass through ductwork is warmed enough to afford space heating application_number US 83669386 A description heater 10 as shown in fig1 and 2 includes a motor 15 turning a rotor 20 within a stator 30 arranged in a box 11 that is preferably lined with insulation 12 to reduce noise and heat loss an air inlet 13 admits ambient or return air into box 11 and an outlet duct 14 directs the heated outflowing air usually to conventional ductwork a stand 16 supports stator 30 and motor 15 in the path of inflowing air that keeps motor 15 cool and slightly warms the air as it proceeds to intake 18 around shaft 17 in the initial stator stage 31 inside of stator stage 31 as shown in fig2 inflowing air encounters the first rotor impeller 21 which pumps the air radially outward impeller 21 drives the air at a high velocity from peripheral discharge 22 against wall 32 of stator stage 31 where the air is retroverted radially inward the considerable turbulent energy involved in forcing air at a high velocity against stator wall 32 and.