and includes the same professional grade automatic vent opener as the MONT Greenhouse comes standard with

What electrical requirements do these units need

It is best used for serious backyard gardeners who want a large greenhouse that can function as both a productive growing space and a visually appealing garden room

available in 6 widths

Janssens | Spindle Opener for Roof Window estimatestart-60 and includes the same professionalThe Janssens Spindle Opener for Roof Window is an optional addition to your Roof window in your Janssens greenhouse. This is a manual opener that works like a large threaded screw for Royal or Junior Victorians. Very strong and heavy duty good for high wind areas long handle NOT included. If you already have a spindle opener, you should already have the handle. If not, you can order the Long Handle for Spindle Opener here. WARRANTY 15 Year Limited