Louvre windows mounted at ground level are a very effective way of creating movement of air in your greenhouse and these can be supplied in most building designs. This is a five-bladed louvre, measuring 24″ x 18″ (0.61m x 0.45m). Supplied with fixing nuts and bolts. Plain aluminium finish with SAN safety glass. Suitable for fitting low in the side or end of your aluminium greenhouse. It can only be fitted between two glazing bars that will take a 24″ piece of glass.