Sigma™ Automatic Roof Vent Window Buy Option (Select):Buy for a Existing greenhouse Only fits Sungrow greenhouse models

Only fits Sungrow greenhouse models

Fly Screen Cover for Louvre Window

Model: HG6120G (Green)

HEAT SOURCE Propane Gas

and includes one large Louver

Sigma™ Automatic Roof Vent Window Buy Option (Select):Buy for a Existing greenhouse Only fits Sungrow greenhouse modelsDESCRIPTION The Sigma automatic ventilation window is a perfect complement to your Sigma Greenhouse. Provides heat activated ventilation and improves air circulation inside your Sigma Greenhouse. It is easy to install. You have the possibility to step less adjust the temperature where the opener begins to react to the surrounding temperature. This opener can not be closed once it is opened. This window only work for Planta Sigma greenhouse. BUYING