Hoklartherm | Riga Automatic Roof Vent Opener Duramax insulated building easy-to-assemble

easy-to-assemble

Effective Light Control

8mm twin-wall polycarbonate roof panels - polycarbonate panels are virtually unbreakable and block 99

lighting kits

1 louver window with clear Lexan cover sheet for the winter season and automatic opener (no electricity needed)

Hoklartherm | Riga Automatic Roof Vent Opener Duramax insulated building easy-to-assembleRIGA 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.