Hoklartherm | Riga Automatic Roof Vent Opener RUSTIC TABLE 35 lbs (Extra Large size)

35 lbs (Extra Large size)

your growing needs and wants are met under one roof

Designed for a MONT 8x8 greenhouse

Durham Orangery

Hoklartherm | Riga Automatic Roof Vent Opener RUSTIC TABLE 35 lbs (Extra Large size)RIGA Automatic Window Opener (no electricity needed) with quick release arm allows the opener to be disconnected in adverse weather conditions. The black piston cylinder is filled with a mix of oils that naturally expand around 73 degrees. As the oil expands, it will begin to push out the rod of the piston and open your window. The springs and the weight of the window will pull the window shut when the temperature drops.