Sigma Automatic Roof Vent Terra providing temperature stability for your

providing temperature stability for your plants

and the plants you would like to cultivate

It's tough enough to withstand moderate to extreme weather conditions

Complete set

This unique system is designed for gardeners of all levels or anyone who wants to grow their own food and bring a slice of nature into their home

Sigma Automatic Roof Vent Terra providing temperature stability for yourPlease note: this window only fits Sigma Greenhouse models. Supercharge your Sigma Greenhouse with the Planta Sigma Automatic Ventilation Window. Improve air circulation by bringing in the fresh outside breeze, keeping your plants healthy and disease free. The automatic ventilation window is heat activated, which requires no electrical power or programming. This function ensures that hot air escapes during the day, preventing shrivelling or withering