• 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 Speed Controller - REB11 x ACOFR9A-ADS-VFC - Automatic Duty Share Changeover panel1 x RD35S-4DW.6W.3L - 122297 (Three Phase)1 x KV DUO 150 EC1 x KV DUO 500 EC (3Ph-400v) with changeover1 x IR24-P - Presence detector1 x ACOAS/ AC/EC Auto Changeover 8Amp1 x Anti Vibration Mounts - Large - Pack of 4 - AVM11 x EC-Vent Room Unit1 x KVK SLIM 100 EC - Centrifugal Circular Duct Fan1 x Transformer Speed Control - RTRE- 12.0Amp1 x MTP 10, 10K, Speed control1 x Vent Axia ACM 150 T (Timer Model) inline mixed flow duct fan2 x Helios TSW 7.5 Amp Transformer speed controller2 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans1 x RTRD - Three Phase Speed Controller - 2 Amp1 x RDS 2 Helios Transformer Controller With Motor Protection1 x Vent Axia ACM 125 inline mixed flow duct fan1 x Temperature Fan Speed Controller - ATCP4-FLS1 x RTRD - Three Phase Speed Controller - 14 Amp1 x Single phase speed controller by auto-transformer - RMB 8.0 Amp1 x RTRDU 3 Phase Trickle & Boost 5 Step Speed Controller - 2 Amps1 x Rectangular Airbrick Adaptor1 x FAST-TRACK RANGE 90mm - Adaptor For Distribution Box1 x Speed Controller - REB31 x EC6H - Reversible Group Fan Electronic Controller1 x Speed Controller - REB51 x Airvent ceiling fan controller1 x Transformer (silent) speed controller - RE 1.5 Amp1 x CBS-60 Outlet Flange for CSB/CBT-601 x FAST-TRACK RANGE 90mm - Click Ring (1 bag of 10)1 x Electronic extractor fan speed controller - FSC 1.51 x REB-CVF 0-10v Controller1 x Speed Controller - REB1-N1 x Elta Variable Speed Drive IP66 - 2.2KW1 x Transformer Speed Control - RTRE- 7.0Amp1 x Transformer Speed Control - RTRE- 5.0Amp1 x Control switch - CR1501 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan1 x REU 1.5amp Speed control - Two Speed Five-Step Transformer - Trickle and Boost1 x RDS 7 Helios Transformer Controller With Motor Protection1 x Transformer speed controller - ATC1 - 1.5 Amps1 x Remote controller FLEX - for VEKO INT1 x S&P MULTI-REG EC FAN CONTROLLER / INTERFACE1 x REU 7amp Speed control - Two Speed Five-Step Transformer - Trickle and Boost1 x RDS 11 Helios Transformer Controller With Motor Protection1 x MWS 3 – Transformer Controller With Motor Protection1 x DEF-140T Inlet Guard for the CBT-100N1 x MWS-75 Transformer controller with TK -7.5A1 x Vent Axia SC5001 - Speed controller1 x 5-Speed Controller for use with Elta SAX Classic Fans1 x Single phase speed controller by auto-transformer - RMB 10.0 Amp1 x 7 Day Programmable TIMECLOCK1 x TD EVO-100 PF ECOWATT - Environmentally Friendly Energy Efficient Inline Fan1 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)1 x CMT-2 200/80 1.1KW - Single inlet centrifugal fan direct driven1 x MWS 1.5 – Transformer Controller With Motor Protection1 x Helios HQW-630/4 - IP551 x WS - Reversing Switch from Helios Fans1 x KMBI 180 Connector rectangular/circular to install on the discharge of CMT1 x Temperature Controller - EDTW1 x CS2 Current Switch1 x Remote Timer Control - 13511 x Transformer (silent) speed controller - RE 3.0 Amp1 x Helios HQW-200/4 - IP551 x Speed Controller - REB61 x Commercial Single or 3 phase Fan Reversing Switch - RS11 x Elta Variable Speed Drive IP66 - 0.75KW1 x FAST-TRACK RANGE 75mm - Click Ring (1 bag of 10)1 x Skyflow SSR Horizontal Roof Cowl SSR31/35B
Reviews
TD-SILENT 350/125
TD-SILENT 350/125
£ 178.68

Excellent low noise fan, I've got one unit running years and...