• 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 Contactor Interface Station - CI91 x RD35S-4DW.6W.3L - 122297 (Three Phase)4 x Silentub - STUB 1001 x TUNE-R-250-3-M1 - Control Damper1 x Elta - Room Sensor - Temp/Humid/C021 x Elta Variable Speed Drive IP66 - 1.5KW2 x TUNE-R-100-2-M1 - Control Damper1 x CBT-100N Centrifugal1 x TUNE-R-250-1-M2 - Control Damper1 x AXC TP - 100mm Plastic Centrifugal Inline Fan1 x TD160-NT Mixvent - 100mm - TD160 Timer1 x Elta Variable Speed Drive IP66 - 2.2KW (1ph to 3ph)1 x Biflow SB400-CON2-3 - High Temperature Bifurcated Fan1 x TUNE-R-200-3-M5 - Control Damper1 x CO2 Room Sensor - CO2-R1 x Speed Controller - REB161 x ELTA - Three Phase Transformer 3amps1 x Helios ESA-1 Surface mounted Speed Control 1amp1 x SPI-100 C Iris damper1 x FRQ5-10A Inverter Speed controller1 x Helios VARW 450/4 - TK1 x 110 x 54mm Round to Rectangular Adaptor - Long1 x RDH Flange - 02502 x TUNE-R-560-2-M1 - Control Damper1 x ADH E0-450 Flange - 0450 ADHE/RDHE2 x TUNE-R-315-3-M1 - Control Damper1 x 125mm Round Connector with Damper1 x Elta 6 Amp Electronic single phase speed controller.1 x Mini Diffuser - 100mm1 x Access Door for Circular Duct - 400 x 300 - SIZE 451 x Nicotra RDH G2E7-04501 x RDH Flange - 03151 x Biflow SB315-CON4-3 - High Temperature Bifurcated Fan1 x 110 x 54mm Short Rectangular to Round Adaptor male1 x ACOAS/ AC/EC Auto Changeover 8Amp1 x RDH Flange - 04001 x TUNE-R-250-2-M2 - Control Damper2 x TUNE-R-160-3-M2 - Control Damper1 x Silent 100 CZ Design 12V Ecowatt + CT-12/161 x Universal Pipe Fixing Clip1 x MWS-75 Transformer controller with TK -7.5A1 x 125mm Round Connector1 x Duct Mounted Filter Box With G2 Paper AND Metal Washable Filter - 150mm1 x 110 x 54mm Horizontal 90 Degree Bend1 x 110 x 54mm Vertical 90 Degree Bend1 x Elta SCP400/4-1AC - IP551 x OBD 450x450 - for use with 4WAY-5951 x Silent 300 CZ Design PLUS Extractor Fan1 x TUNE-R-250-1-M1 - Control Damper1 x MUB 062 630D4 Multibox1 x Ancillary Pack for SLC-3551 x CBMT/Q 315-30 1 HEATER KIT1 x 150mm Round Connector1 x Metal Inline Fan - VENT-355N1 x Jetflow-HIT Metal inline - 100mm1 x Biflow SB250-CON2-3 - High Temperature Bifurcated Fan1 x CAD-COMPACT 900 ADVANCED N8 - MVHR unit1 x Biflow SB250-CON4-3 - High Temperature Bifurcated Fan1 x Bathroom Fan -Envirovent- Silent 100 T (Timer Model)1 x HIMF - Mixed Flow Fan 125mm Inline Fan1 x 100mm Round Connector with Damper1 x Duct Termination with Mesh - 150mm1 x Envirovent Silent MV160/100S Mixvent - 100mm - (5 year warranty)
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