Traditional Fivewall Polycarbonate Greenhouse Kit with 16mm Polycarbonate Panels and Aluminum Frame brand_dura-bench This vent opener uses a

This vent opener uses a very simple principal - Special waxes have an expansion rate of about 18% when heated by the sun

clean air to breathe

In addition to providing an easy single source solution

just before backfilling

Fumigation

Traditional Fivewall Polycarbonate Greenhouse Kit with 16mm Polycarbonate Panels and Aluminum Frame brand_dura-bench This vent opener uses aKey Details Traditional Fivewall Polycarbonate Greenhouse Dimensions: 8' 7 1 2" W x 12' 8 1 2" L 10' 8" x 16' W 9' 1 2" L 12' 8 1 2" W x 20' 10 1 2" L 16' 9 1 2" W x 24' 11 1 2" L 20' 10 1 2" W x 41' 3 1 2" L Sidewalls: 5'6" Frame: Aluminum Color: White, Green Covering: 16mm Polycarbonate Door(s): Screened Storm Door (w Locking Latch and Tempered Glass) Vents: 2 (Automated Roof Windows) Foundation: Options Concrete Piers or Slab Warranty: Frame