Hoklartherm | Riga Automatic Roof Vent Opener RUSTIC TABLE The Standard size is for

The Standard size is for Small

Quick DIY assembly with a simple pin & lock connector system

Designed for a MONT 8x8 greenhouse

your growing needs and wants are met under one roof

and excellent insulation

Hoklartherm | Riga Automatic Roof Vent Opener RUSTIC TABLE The Standard size is forRIGA 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.