Special Features:

Vair pressure up to 12 psi within each gear size and speed, impellers cast iron, balanced to operate w/o vibration, timing gears are steel and bolted on sizes 6 through 8 gear dia, v-belt drive shaft; medium pressure units, 3810 rpm, 49 cfm

Properties:

A nonpositive displacement mechanical device having an axial or centrifugal fan impeller inclosed within a housing with an exhaust nozzle and baffles. It is designed to move air across an open entrance to provide an air barrier to minimize heat loss or gain and repel flying insects. It may include a means of heating the exhaustible air.