• 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 Run On Timer - 5s - 4hrs - RT5A2 x Remote Timer Control - 13511 x Helios ZNE Electronic Fan Overrun Timer2 x Multi Input Run On Timer - 0 - 20min - CFCU1 x Time Delay Unit - DT20B1 x 7 Day Programmable TIMECLOCK1 x TTC-2000 Three phase electric heater controller1 x ACOAS/ AC/EC Auto Changeover 8Amp1 x ACO8AC/EC AutoChangeover panel4 x Systemair Save Connect 2.0 Internet Module3 x Elta Variable Speed Drive IP66 - 2.2KW1 x Elta Variable Speed Drive IP66 - 7.5KW1 x Helios TSD 3.0 Transformer Speed Control (400v)1 x FU 15 40 Frequency Inverter1 x FRQ-10A V2 Inverter Speed controller1 x FU 15 16 Frequency Inverter1 x Balance S Diffuser - NO RING - 100mm1 x ELTA - Single Phase Transformer 12amps1 x PCA Diffuser - PCA-2501 x Round ceiling diffuser 350mm1 x ELTA - Single Phase Transformer 10amps2 x Elta 3 Amp Electronic single phase speed controller with TK1 x FAST-TRACK RANGE 75mm - Click Ring (1 bag of 10)1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5001 x Easy-fix termination kit - 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