Sigma Ventilation Window recommendation The number of recommended windows

The number of recommended windows depends on the size of the greenhouse

3' width provides easy access to the plants in the garden bed

Tip: When paired with anti-dust tape

Sigma 20 (10x19

and beginner-friendly

Sigma Ventilation Window recommendation The number of recommended windowsPlease note: this window only fits Sigma Greenhouse models. The Planta Sigma Ventilation Window is a fantastic add on for your Sigma Greenhouse. It will efficiently increase air circulation, maintaining a comfortable temperature, which is essential for healthy plant growth and disease control. The number of suggested windows is determined by the size of the greenhouse, the environment and growing zone in which you live, and the plants you would like