With our Poly-Vent ventilation system you’ll have an economical alternative to rack & pinion, and you’ll save in a host of other ways, too. Save on electrical bills by reducing the use of large fans, save on heating costs because Poly-Vent’s dead air space provides an effective layer of insulation, and reduce your maintenance time with fewer moving parts.

You can order your Expansion Mansion with a multitude of different doors for work flow and ventilation.

Double inflated poly
or polycarbonate sheeting

Choose from a white or clear double polyethylene or several different types of long-lasting polycarbonate structured sheeting.