• 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

6 x Electronic extractor fan speed controller - FSC 1.51 x EC-Vent Room Unit2 x MWS 1.5 – Transformer Controller With Motor Protection1 x Helios HQW-200/2 - IP553 x WS - Reversing Switch from Helios Fans1 x Envirovent G4 Filter - SL-G4/F71 x Elta ACO Panel 149-ACO18B1 x Systemair Save Connect 2.0 Internet Module3 x Transformer Speed Control - RTRE- 12.0Amp3 x Vent Axia T-Series Controller3 x Helios HQW-200/4 - IP552 x EC6H - Reversible Group Fan Electronic Controller1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5003 x Helios HQW-630/4 - IP554 x Transformer (silent) speed controller - RE 3.0 Amp2 x Transformer (silent) speed controller - RE 1.5 Amp1 x EM30-24 Control Panel Commissioning Service2 x Commercial Single or 3 phase Fan Reversing Switch - RS11 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 6302 x TG-K3/NTC10-01 - Duct temperature sensor2 x Remote Timer Control - 13512 x CPTA-S PIR SENSOR Volt Free Contacts - Surface Mounted1 x Easy-fix termination kit - High Rise Ventilator - EFT2 x CBS-60 Outlet Flange for CSB/CBT-601 x TD Mixvent 800/200 EEXEIIT33 x Airvent ceiling fan controller1 x SG-200 Fan Guard for the HQW 2003 x Vent Axia Silent 100T (TIMER)1 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans2 x MTP 10, 10K, Speed control2 x Skyflow SSR Horizontal Roof Cowl SSR31/35BS2 x EBM-Papst D4E225-BC01-17 Double inlet1 x Transformer 5 Speed Controller - ATC1-8TK1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 3551 x Speed Controller - REB101 x Two Speed Switch - REGUL-21 x Transformer 5 Speed Controller - ATC1-2TK2 x Quietflow SQS400-1ECL - Centrifugal Box Fan1 x REE-1 Electronic Speed Controller2 x Speed Controller - REB1-N1 x CBM Low Pressure Centrifugal Fan - CBM 10/10 4 Pole 550watt CVR2 x TG-R room temperature sensor1 x Transformer (silent) speed controller - RE 5.0 Amp1 x PIR Sensor - PIR22 x Speed Controller - REB52 x Multiflow SMB550/4-1AC1 x Elta Wall Cowl SWC56/632 x Vent Axia ACM 200 inline mixed flow duct fan2 x Helios HQW-315/4 - IP552 x TUNE-R-200-3-M1 - Control Damper1 x Speed Controller - REB11 x Helios HQW-250/4 - IP551 x Transformer Speed Control - RTRE- 1.5Amp1 x Elta Variable Speed Drive IP66 - 0.75KW1 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan2 x CBA-60 Inlet Flange for CBT-601 x DDMP 12-12 3F 1810W M6A4 DG01 x CBM 9-9 550w 4P VR (Open Motor)2 x Elta Variable Speed Drive IP66 - 2.2KW1 x Skyflow SSR Horizontal Roof Cowl SSR31/35B1 x CBM Low Pressure Centrifugal Fan - CBM 9/7 4 Pole 373watt CVR1 x Biflow SB400-CON2-3 - High Temperature Bifurcated Fan1 x CBT-100N Centrifugal1 x LFBR 315 G4 - Helios Inline Filter Box - 315mm1 x Bathroom Fan -Envirovent- Silent 100 T (Timer Model)2 x RDH FLEX-SQUARE - ADH/RDH 04501 x Envirovent 4 Way Remote Control Switch - SWHBKRF-41 x VEKA INT 2000/15.0-L1 EKO1 x PIR Sensor - PIR41 x REU 7amp Speed control - Two Speed Five-Step Transformer - Trickle and Boost
BD9/9 centrifugal M4 0.35Kw
BD9/9 centrifugal M4 0.35Kw
£ 399.00 now £ 350.00
Reviews
TD-SILENT 350/125
TD-SILENT 350/125
£ 178.68

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