Sigma Ventilation Window recommendation 8mm LEXAN™ THERMOCLEAR™ 15:

8mm LEXAN™ THERMOCLEAR™ 15:

Reliable and long-lasting with a 5-year warranty

virtually unbreakable sheet

"Bronze" or "Opal"

Sigma Ventilation Window recommendation 8mm LEXAN™ THERMOCLEAR™ 15:Please 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