• 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

3 x Single phase speed controller by auto-transformer - RMB 1.5 Amp1 x Helios ZNE Electronic Fan Overrun Timer1 x MWS 3 – Transformer Controller With Motor Protection1 x Time Delay Unit - DT20B1 x Multi Input Run On Timer - 0 - 20min - CFCU1 x ACO8AC/EC AutoChangeover panel1 x ACOAS/ AC/EC Auto Changeover 8Amp1 x Helios HQW-200/2 - IP551 x 7 Day Programmable TIMECLOCK4 x BEAS-control module1 x TTC-2000 Three phase electric heater controller3 x Elta 6 Amp Electronic single phase speed controller with TK2 x CPTA-S PIR SENSOR Volt Free Contacts - Surface Mounted3 x Single phase speed controller by auto-transformer - RMB 8.0 Amp1 x EM30-24 Electro-Mechanical Control Panel1 x Elta ACO Panel 149-ACO14E3 x Systemair Save Connect 2.0 Internet Module1 x CONTROL ECOWATT - Basic3 x Transformer 5 Speed Controller - ATC1-12TK3 x TG-K3/NTC10-01 - Duct temperature sensor2 x Envirovent G4 Filter - SL-G4/F74 x Helios HQW-200/4 - IP551 x EC-Vent control board1 x Elta ACO Panel 149-ACO18B1 x Isolator Switch - EFF-ISO4 x MWS 1.5 – Transformer Controller With Motor Protection1 x ACO 149-ACO1/EDV2 x Elta Variable Speed Drive IP66 - 0.37KW (1ph to 3ph)2 x EC6H - Reversible Group Fan Electronic Controller3 x Speed Controller - REB104 x SG-200 Fan Guard for the HQW 2001 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 6302 x Helios HQW-630/4 - IP551 x Skyflow SSR Horizontal Roof Cowl SSR31/35BS2 x Multiflow SMB550/4-1AC2 x Elta Variable Speed Drive IP66 - 0.75KW2 x WS - Reversing Switch from Helios Fans2 x Helios HQW-250/4 - IP551 x EM30-24 Control Panel Commissioning Service1 x PIR Sensor - PIR21 x Single phase speed controller by auto-transformer - RMB 10.0 Amp1 x MTP 10, 10K, Speed control1 x Helios TSW 1.5 Amp Transformer speed controller2 x Single phase speed controller by auto-transformer - RMB 3.5 Amp1 x RDH FLEX-SQUARE - ADH/RDH 04501 x UB47- Universal Insulated Terminal1 x Airvent ceiling fan controller1 x Helios TSW 7.5 Amp Transformer speed controller2 x MV-B Dual Switch for use with Helios HQW plate fans,3 x Commercial Single or 3 phase Fan Reversing Switch - RS12 x Vent Axia Silent 100T (TIMER)1 x Quietflow SQS100-1ECL - Centrifugal Box Fan2 x S&P MULTI-REG EC FAN CONTROLLER / INTERFACE1 x Bathroom Fan -Envirovent- Silent 100 T (Timer Model)1 x REE-1 Electronic Speed Controller1 x AXC TP - 150mm Plastic Centrifugal Inline Fan1 x TG-R room temperature sensor1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5002 x Transformer Speed Control - RTRE- 7.0Amp1 x Quietflow SQS400-1ECL - Centrifugal Box Fan2 x Flakt Woods ME 1.6 speed controller 6.0amp - EA9011591 x CBS-60 Outlet Flange for CSB/CBT-601 x TD Mixvent 800/200 EEXEIIT31 x PIR Sensor - PIR41 x Speed Controller - REB11 x CBM 9-9 550w 4P VR (Open Motor)1 x Elta 6 Amp Electronic single phase speed controller.2 x CBM Low Pressure Centrifugal Fan - CBM 10/10 4 Pole 550watt CVR1 x VTR 300 STD Filter Kit1 x Transformer (silent) speed controller - RE 3.0 Amp1 x Envirovent Silent MV160/100S Mixvent - 100mm - (5 year warranty)1 x Helios PU10 Speed Potentiometer (Flush Mounted)1 x CMT-2 120/50 - 0,09Kw - LG270 Single inlet centrifugal fan direct driven1 x HIMF - Mixed Flow Fan 100mm Inline Fan1 x Speed Controller - REB81 x Helios ESA-1 Surface mounted Speed Control 1amp1 x DDMP 12-12 3F 5700W M6M0 DG71 x RD35S-4DW.6W.3L - 122297 (Three Phase)1 x Elta HXP 800mm 6-Pole (Three Phase)1 x Vent Axia T-Series Controller1 x CO2 Room Sensor - CO2-R1 x Silent 100 Window Kit - windowS2 x Remote Timer Control - 13511 x Electronic extractor fan speed controller - FSC 1.5
Reviews
TD-SILENT 350/125
TD-SILENT 350/125
£ 178.68

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