Sigma 3 x 1.4 ft. Automatic Roof Vent brand_ecogrow 10 year non-Prorated Warranty

10 year non-Prorated Warranty

This keeps soil warmer in the spring and fall

It is pathogen-free

1 - Loc sleeve header as described in 4 foot kit

Sigma 3 x 1.4 ft. Automatic Roof Vent brand_ecogrow 10 year non-Prorated WarrantySupercharge 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