Sigma Automatic Roof Vent Terra providing temperature stability for your

providing temperature stability for your plants

switch to fan-only mode to keep air circulating evenly — a key step in preventing mold and hotspots around your plants

providing ample space for various crops

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

The tall 8 ft roof height combined with the end-to-end ventilation ensure that your plants will thrive

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