The Zehnder ComfoPipe tube system is suitable for use in outdoor and exhaust air as well as supply and extract air. The tube material – extruded polypropylene – is an extremely light, insulated material which is sealed against vapour diffusion. The shaped, triple-seal connector pieces ensure a safe and airtight connection within the tube system. Adhesion of the joint on site is no longer required. The tube system comprises a length element with an overall length of 1,000 mm, a sleeve for connecting shortened tube pieces without a connection profile and a 45° bend. Length markings are indicated on the tube elements to ensure easy installation.