Alton Bayliss XL Piston Shelves After cooling

After cooling

Box Dimensions:   48"L x 11"W x 6"H

Operation: Automatic temperature-activated opening and closing

ft - but it all depends on how many plants are inside a greenhouse - a full greenhouse needs less power

Optional roof crests and finials for a more traditional look

Alton Bayliss XL Piston Shelves After coolingAlton Bayliss XL Piston The Bayliss XL Piston or Power Tube is a direct replacement component designed specifically for the Bayliss XL Automatic Greenhouse Vent Opener. If your current unit is no longer responding as it should, replacing the power tube is a simple and cost effective way to restore smooth, temperature driven vent operation. This tube contains a heat sensitive wax core that expands as temperatures rise and contracts as they fall,