Downdraught damper Calima

To avoid air movements in undesired directions during fan installation in ducts without natural circulation (e.g. against an exterior wall), the Pax Calima accessory draught shutter can easily be installed afterwards. This assumes that another ventilation system handles the building’s basic ventilation flow. PLEASE NOTE! A draught shutter is detrimental if the fan is installed in a ventilation duct with natural circulation.