Westminster Greenhouse

more aluminum than the average imported greenhouse

or larger 11

Make the most of the outdoors and enjoy your Dallas gazebo in a bug free environment with a custom designed netting set

delicate plants

Hoklartherm | Riga Automatic Roof Vent Opener PALRAM ARCADIA 5000 Westminster GreenhouseRIGA 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.