Sigma 3 x 1.4 ft. Automatic Roof Vent brand_ecogrow It is pathogen-free

It is pathogen-free

/1000 ft² to 25-50 mil

1 - Loc sleeve header as described in 4 foot kit

oversized shaft bearings

Sigma 3 x 1.4 ft. Automatic Roof Vent brand_ecogrow It is pathogen-freeSupercharge 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