Additional Roof Window for Riga IIs, IIIs, III, IVs, IV, V

Maximize the natural ventilation in your Riga Greenhouse with an extra 40" wide x 24" deep automated roof window. Each window includes (1) automatic opener for hands-off operation. Window opens and closes according to indoor temperature. Window works with the Riga IIs, IIIs, III, IVs, IV, and V. Does NOT include polycarbonate. Must cut full length poly panel to accommodate new roof vent AND cut the remainder to fit the roof vent. This does involve taking apart the greenhouse. Best to order before greenhouse is assembled.