The Zehnder ComfoVent 180 façade system is suitable for use in domestic ventilation systems in outdoor and exhaust air. System 1 is available for connection above ground level and System 2 for connection below ground level. The system is used to fulfil the requirements of DIN 1946-6 with regard to hygienic and snow-proof air intake. Thanks to the tight connection technology, the system fulfils the requirement for radon tightness.