Alton | Automatic Louvered Window Opener RADIANT HEATING Each one takes two full

Each one takes two full panels on the greenhouse

Designed for a MONT 8x12 greenhouse

Built-in front aluminum gutter & back hidden rubber gasket prevent water seepage and direct rainwater sideways

Keep your Firewood Dry & Organized

Heating Output: 1500w / 5118 BTU

Alton | Automatic Louvered Window Opener RADIANT HEATING Each one takes two fullLouver windows help the ventilation of a greenhouse. Adding an Alton Automatic Louver Opener will help regulate the airflow automatically when temperature changes. Automatic attachment for a Louvre vent, fits most louvres. Its fully adjustable to open over a range of temperatures between 59 77 degrees F. Some drilling is required to fit. Please note that an auto louvre CANNOT fit a louver which is directly left of an a frame when you look at it