Energy efficient PSC Inflation Blowers from J&D Manufacturing are designed to inflate double poly greenhouses for greater insulation capabilities. All models have adjustable damper doors to regulate air flow as the poly expands. J&D Inflation Blowers have a heavy gauge steel housing and forward curve metal wheel that is balanced for smooth operation. Oversized mounting holes on the discharge flange fit most industry standard brackets. FEATURES Permanent split capacitor, energy efficient, Class B motor with sealed ball bearings and automatic thermal overload protection PSC motor draws 50% less power and 70% less amps than similar shaded-pole blowers Heavy gauge steel housing with powder coated black finish Adjustable air flow damper Forward curve metal blower wheelDynamically balanced to reduce noise and vibration Fully enclosed wires and connections Junction box with cord knock out for easy wiring Brass set screw for ground wire Fits most industry standard mounts Available with 6’ cord and 3-prong plug pre-wired for 120 Volts Ships fully assembled and individually packaged