The 20' Manual External Light Deprivation Kit is complete and ready to go. Kit includes a 1 7/8" x 2 3/8" frame with your choice of truss spacing. Passive ventilation system includes roll-up sides with handles to cool and ventilate the greenhouse. Woven membranes with a 4 year warranty insures protection from the elements. A manual light deprivation package makes controlling the light cycle effortless with 2 5:1 ratio chain cranks. Includes all necessary accessories for all core functions. Lumber and cement to be purchased separately.
manual light deprivation system requires zero power
heavy duty woven greenhouse membranes clear & black
greenhouse film fastening system
passive ventilation system
wind retention system
steel framed end wall package with barn style sliding door