A Ø100mm round condensation trap used to prevent condensation water running back down the duct towards the fan. This condensation trap falls in line with guidance outlined in the domestic ventilation compliance guide. The bottom part of rigid duct is sealed to prevent water running down the duct while the top part of the pipe will be loose to trap water coming from the inside and outside. Airflow Developments recommends the use of a condensation trap within its ducting systems.
