Special ESTRAER Aerator – To Fit TPE and PVC Shafts

Wallbarn can now offer an ingenious new aerator device to fit onto standard vents. The ESTRAER® aerator hood is a cone-shaped device designed to increase the amount of moisture sucked out of the concrete structure, drawing a far greater amount of vapour than the traditional cap. It can be used with both TPE and PVC vents shafts, and it tough and durable, but very easy to fit.
http://www.wallbarn.com/products/roof-outlets-vents/roof-vents-aerators/special-estraer-aerator-to-fit-tpe-and-pvc-shafts/