Aerators for vapour extraction between the slab and waterproof membrane. Resistant, flexible and compatible with APP and SBS bituminous membranes. Ideal aerators are designed to encourage the dynamic extraction of water vapour that forms between the slab and the waterproof roof membrane. For best results, we recommend the installation of 3-4 aerators per 100 square metres. They can also be used as room ventilation flues, especially when combined with the Estraer cup. The special enlarged shape at the base allows Ideal aerators H 160 and H 400 to also be used on ventilation ducts with an external diameter of up to 125 mm.