Sigma 3 x 1.4 ft. Automatic Roof Vent sale-summer Condensate control features are built

Condensate control features are built into rollformed arches and purlins

fabric densities and colors for a personalized solutions

the Garden Tray combines strength and sustainability

Self-Ignition Termperature - 830°F

Part storage and work shed

Sigma 3 x 1.4 ft. Automatic Roof Vent sale-summer Condensate control features are builtSupercharge your Sigma Greenhouse with the Sigma Automatic Roof Vent. Improve air circulation by bringing in the fresh outside breeze, keeping your plants healthy and disease free. The automatic roof vent is heat activated, which requires no electrical power or programming. This function ensures that hot air escapes during the day, preventing shriveling or withering of your plants. Sigma Automatic Roof Vent Features: Made from galvanized steel and