• 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 MWS 3 – Transformer Controller With Motor Protection2 x Single phase speed controller by auto-transformer - RMB 1.5 Amp1 x Isolator Switch - ISOSW1 x CS2 Current Switch3 x Single phase speed controller by auto-transformer - RMB 8.0 Amp1 x Elta ACO Panel 149-ACO14E1 x EC-Vent control board1 x CONTROL ECOWATT - Basic3 x Elta 6 Amp Electronic single phase speed controller with TK1 x ACO 149-ACO1/EDV1 x EM30-24 Electro-Mechanical Control Panel4 x MWS 1.5 – Transformer Controller With Motor Protection3 x WS - Reversing Switch from Helios Fans1 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection1 x Elta ACO Panel 149-ACO18B1 x EC-Vent Room Unit2 x BEAS-control module2 x Systemair Save Connect 2.0 Internet Module3 x Electronic extractor fan speed controller - FSC 1.53 x EC6H - Reversible Group Fan Electronic Controller2 x Helios HQW-200/2 - IP552 x CPTA-S PIR SENSOR Volt Free Contacts - Surface Mounted1 x EM30-24 Control Panel Commissioning Service1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5002 x Vent Axia T-Series Controller2 x Transformer Speed Control - RTRE- 12.0Amp2 x Helios HQW-630/4 - IP552 x Transformer 5 Speed Controller - ATC1-12TK1 x TG-K Duct temperature sensor1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 6302 x TG-K3/NTC10-01 - Duct temperature sensor5 x Transformer (silent) speed controller - RE 3.0 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 Single phase speed controller by auto-transformer - RMB 3.5 Amp1 x Vent Axia ACM 125 inline mixed flow duct fan1 x Single phase speed controller by auto-transformer - RMB 10.0 Amp1 x Easy-fix termination kit - High Rise Ventilator - EFT2 x REE-1 Electronic Speed Controller4 x Helios HQW-200/4 - IP552 x S&P MULTI-REG EC FAN CONTROLLER / INTERFACE1 x Two Speed Switch - REGUL-22 x Remote Timer Control - 13512 x Transformer (silent) speed controller - RE 1.5 Amp2 x Commercial Single or 3 phase Fan Reversing Switch - RS12 x Skyflow SSR Horizontal Roof Cowl SSR31/35BS1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 3552 x Airvent ceiling fan controller1 x Transformer Speed Control - RTRE- 1.5Amp3 x SG-200 Fan Guard for the HQW 2001 x RDS 7 Helios Transformer Controller With Motor Protection1 x CBS-60 Outlet Flange for CSB/CBT-603 x Elta Variable Speed Drive IP66 - 0.75KW2 x Vent Axia Silent 100T (TIMER)1 x Elta Variable Speed Drive IP66 - 0.37KW (1ph to 3ph)1 x Helios PU10 Speed Potentiometer (Flush Mounted)2 x TG-R room temperature sensor1 x Transformer 5 Speed Controller - ATC1-2TK1 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans2 x MTP 10, 10K, Speed control2 x CBM Low Pressure Centrifugal Fan - CBM 10/10 4 Pole 550watt CVR1 x Speed Controller - REB51 x Multiflow SMB550/4-1AC1 x Elta Wall Cowl SWC56/631 x QPTW 250C Acoustic Twin Fan with Controller2 x RDH FLEX-SQUARE - ADH/RDH 04501 x KMBI 225 Connector rectangular/circular to install on the discharge of CMT1 x CBA-60 Inlet Flange for CBT-601 x Helios HQW-315/4 - IP551 x Bathroom Fan -Envirovent- Silent 100 T (Timer Model)1 x Speed controller with Reverse - REB-1R1 x EBM-Papst D4E225-BC01-17 Double inlet1 x TD Mixvent 800/200 EEXEIIT3
Reviews
TD-SILENT 350/125
TD-SILENT 350/125
£ 178.68

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