Sigma Automatic Ventilation Window ministar recommendation and maintains long - term

and maintains long - term clarity and light transmission

Please note: This powerful Heater & Cooler uses a NEMA 6-20P plug and requires a unique 240V outlet

Price per sheet: $110

and long-lasting with a 10-year warranty

rust-resistant steel

Sigma Automatic Ventilation Window ministar recommendation and maintains long - termPlease 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