Sigma Automatic Roof Vent 16mm Price per sheet: $80

Price per sheet: $80

5 lb / 2 kg Heat Source Electronic Dimensions (HxWxD) 11 x 8 x 12

These shutters are constructed with a heavy-duty extruded aluminum frame featuring precision-milled and strong welded corners for long-lasting durability

Complete Kit: Comes with the motor

Operation is smooth and reliable thanks to the use of nylon bushings and solid shafts

Sigma Automatic Roof Vent 16mm Price per sheet: $80Please note: this window only fits Sigma Greenhouse models. Supercharge your Sigma Greenhouse with the Planta Sigma Automatic Roof Vent. Improve air circulation by bringing in the fresh outside breeze, keeping your plants healthy and disease free. The automatic roof vent is heat activated, which requires no electrical power or programming. This function ensures that hot air escapes during the day, preventing shrivelling or withering of your plants.