Flat Plastic Ducting Shutter – 110x54mm
Alpha Air Ventilation Supplies
£3.44
Back-draught shutter for plastic ventilation ducting lightweight gravity flaps close when the fan is off to keep out draughts, cold air and fumes. 110x54mm back draught shutter for flat plastic ducting a rigid plastic fitting with lightweight gravity flaps that open with the airflow when the fan runs, then drop closed when it stops. Fitted within a 110x54mm flat channel run, it keeps out cold draughts, backflow and outside odours without restricting extract performance. Back draught shutters are a simple upgrade for any extract system: they stop chilly air blowing back through a fan or cooker
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