The JanAire curtain is also called PolyVent
A PolyVent curtain resembles an inflatable air mattress propped up on its side and encased in a metal frame.
PolyVent III is operated with two blowers. It has a special seal in either the second or third tube from the bottom of the poly. PolyVent III operates with two 1/40th, 50 watt squirrel cage blowers. One blower is connected to the top tube of the poly. The second blower is connected to the tube just below the solid seal on the poly curtain. Both blowers are connected with flex hoses. PolyVent III is used by itself on hog and poultry barns or in the top section of a stacked JanAire unit on a dairy barn.