• Model:DAOSL

DAOSL Back Draft Damper

£ 11.49 (excl. VAT)

£ 13.79 (inc. VAT)



The DAOSL back draft damper has aluminium lamellae which open during the air flow in one direction and close when the fan motor is inactive. When no air is flowing, the lamellae are maintained in a vertical position using a spring. The damper is supplied with double EPDM gasket.

Available sizes - 100m, 125mm, 150mm, 200mm, 250mm, 315mm,

Please select below..

Look good, works well, except the shaft of the lanellae cuts into the tube or pipe. Had to shorten mine to get it in. The shaft should not be longer that the seals diameter.

Rated by Trevor

Thank you for the review. The shaft length is not normally a problem because they are normally used to join two lengths of ducting and are not designed to be fully inserted, although it is interesting you have managed it! Be aware any extra friction on the shaft will affect its operation.
- Admin

Available Options

1 x 204x60mm Insulated Rectangular Horizontal 45° Bend1 x 220x90mm Insulated Rectangular Vertical 45° Bend2 x 220x90mm Insulated Rectangular Vertical 90° Bend1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 3551 x GRA-100 External Grill by S&P1 x Elta Wall Cowl SWC35/401 x Elta Louvre Shutter - 400mm1 x Elta Wall Cowl SWC45/501 x Jet Cowl - 315mm1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 7103 x 220x90mm Insulated Rectangular Horizontal 90° Bend2 x 204x60mm Insulated Rectangular Vertical 45° Bend1 x Egg Crate Grille with Dust panel filter 1 inch- 595x5952 x 204x60mm Insulated Rectangular Vertical 90° Bend1 x 220 x 90mm Duct to Fitting Connector for use with Insulated Thermal Ducting1 x Non Vision 150mm x 150mm (Air Transfer) Grille - With Flange - MILL FINISH2 x Mini Diffuser - 100mm2 x Multi Input Run On Timer - 0 - 20min - CFCU1 x Vent Axia ACM 150 inline mixed flow duct fan1 x Push Timer Switch - ZA41 x Run On Timer - 5s - 4hrs - RT5A2 x Remote Timer Control - 13511 x Helios ZNE Electronic Fan Overrun Timer1 x Time Delay Unit - DT20B1 x 7 Day Programmable TIMECLOCK1 x TG-K Duct temperature sensor1 x TTC-2000 Three phase electric heater controller1 x ACOAS/ AC/EC Auto Changeover 8Amp2 x ACO8AC/EC AutoChangeover panel1 x Elta ACO Panel 149-ACO14E1 x EC-Vent control board1 x CONTROL ECOWATT - Basic1 x EM30-24 Electro-Mechanical Control Panel1 x ACO 149-ACO1/EDV1 x Systemair Save Connect 2.0 Internet Module1 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection1 x EC-Vent Room Unit1 x EM30-24 Control Panel Commissioning Service1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5001 x Easy-fix termination kit - High Rise Ventilator - EFT1 x Transformer (silent) speed controller - RE 5.0 Amp1 x REB-CVF 0-10v Controller1 x Elta Wall Cowl SWC56/631 x PIR Sensor - PIR21 x PIR Sensor - PIR41 x SAVE VSR 300 heat recovery unit1 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan1 x Transformer 5 Speed Controller - ATC1-4TK1 x Speed Controller - REB1-N1 x Silent 100 Window Kit - windowS1 x AXC TP - 150mm Plastic Centrifugal Inline Fan1 x Single phase speed controller by auto-transformer - RMB 1.5 Amp1 x CMT-2 200/80 1.1KW - Single inlet centrifugal fan direct driven1 x KMBI 180 Connector rectangular/circular to install on the discharge of CMT1 x 220x90mm Insulated Rectangular Horizontal 45° Bend1 x Transformer (silent) speed controller - RE 1.5 Amp1 x Speed Controller - REB51 x RDH FLEX-SQUARE - ADH/RDH 04501 x Transformer Speed Control - RTRE- 1.5Amp1 x CBM 9-9 550w 4P VR (Open Motor)1 x Speed Controller - REB11 x Egg Crate Grille with G2 Dust panel filter 1 inch- 300x3001 x CBM Low Pressure Centrifugal Fan - CBM 12/12 6 Pole 736watt CVR1 x Vent Axia ACM 150 T (Timer Model) inline mixed flow duct fan
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