• 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

2 x Transformer Speed Control - RTRE- 12.0Amp2 x TG-K3/NTC10-01 - Duct temperature sensor1 x CMT-2 225/090 1.1KW - Single inlet centrifugal fan direct driven2 x REE-1 Electronic Speed Controller2 x Remote Timer Control - 13514 x Helios HQW-200/4 - IP551 x Silent 100 Window Kit - windowS1 x BEAS-control module1 x Single phase speed controller by auto-transformer - RMB 8.0 Amp1 x Helios HQW-200/2 - IP551 x Elta ACO Panel 149-ACO18B1 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection1 x Systemair Save Connect 2.0 Internet Module4 x Airvent ceiling fan controller3 x MWS 1.5 – Transformer Controller With Motor Protection1 x Envirovent G4 Filter - SL-G4/F72 x Commercial Single or 3 phase Fan Reversing Switch - RS11 x CPTA-S PIR SENSOR Volt Free Contacts - Surface Mounted1 x EM30-24 Control Panel Commissioning Service3 x WS - Reversing Switch from Helios Fans1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 6301 x Bathroom Fan -Envirovent- Silent 100 T (Timer Model)2 x Quietflow SQS400-1ECL - Centrifugal Box Fan2 x Speed Controller - REB51 x Helios HQW-630/4 - IP551 x Transformer Speed Control - RTRE- 7.0Amp3 x Elta Variable Speed Drive IP66 - 0.75KW2 x Elta Variable Speed Drive IP66 - 0.37KW (1ph to 3ph)1 x Easy-fix termination kit - High Rise Ventilator - EFT1 x Helios PU10 Speed Potentiometer (Flush Mounted)1 x Vent Axia T-Series Controller3 x S&P MULTI-REG EC FAN CONTROLLER / INTERFACE1 x Vent Axia ACM 125 inline mixed flow duct fan4 x Transformer (silent) speed controller - RE 3.0 Amp2 x Multiflow SMB550/4-1AC1 x EBM-Papst D4E225-BC01-17 Double inlet1 x CBM 9-9 550w 4P VR (Open Motor)1 x Speed Controller - REB101 x Helios HQW-315/4 - IP551 x Transformer 5 Speed Controller - ATC1-2TK2 x Electronic extractor fan speed controller - FSC 1.54 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans1 x Transformer (silent) speed controller - RE 5.0 Amp2 x QPTW 250C Acoustic Twin Fan with Controller1 x Elta Variable Speed Drive IP66 - 2.2KW2 x TUNE-R-200-3-M1 - Control Damper3 x Vent Axia Silent 100T (TIMER)1 x CBM Low Pressure Centrifugal Fan - CBM 10/10 4 Pole 550watt CVR2 x MTP 10, 10K, Speed control1 x Transformer Speed Control - RTRE- 1.5Amp1 x REB-CVF 0-10v Controller1 x Skyflow SSR Horizontal Roof Cowl SSR31/35B1 x CBM Low Pressure Centrifugal Fan - CBM 9/7 4 Pole 373watt CVR2 x PIR Sensor - PIR21 x EC6H - Reversible Group Fan Electronic Controller1 x CBM Low Pressure Centrifugal Fan - CBM 10/10 4 Pole 550watt VR1 x MTS10- extractor fan 3 step switch1 x Speed Controller - REB1-N1 x RDH FLEX-SQUARE - ADH/RDH 04501 x KKS 100 silencer-section - For use with the MUB 100 size Fans.2 x SG-200 Fan Guard for the HQW 2002 x Helios HQW-250/4 - IP551 x Vent Axia ACM 150 T (Timer Model) inline mixed flow duct fan1 x RDS 11 Helios Transformer Controller With Motor Protection1 x FAST-TRACK RANGE 75mm - Click Ring (1 bag of 10)1 x REE-2 Electronic Speed Controller1 x DDMP 12-12 3F 1810W M6A4 DG01 x Skyflow SSR Horizontal Roof Cowl SSR31/35BS1 x MEV Spider Wireless boost Switch - MEV-SWH-W1 x DDMP 10-08 3F 2210W M6A4 DG01 x TG-R room temperature sensor1 x CBA-100 Inlet Flange for CBT-1001 x CBS-60 Outlet Flange for CSB/CBT-601 x CBA-60 Inlet Flange for CBT-601 x Speed controller with Reverse - REB-1R1 x Transformer speed controller - ATC1 - 1.5 Amps1 x Isolator Switch - ISOSW1 x Elta 10 Amp Electronic single phase speed controller.1 x Transformer (silent) speed controller - RE 1.5 Amp1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 3551 x Elta 6 Amp Electronic single phase speed controller.
Reviews
Transformer (silent) speed controller - RE 1.5 Amp
Transformer (silent) speed controller - RE 1.5 Amp
£ 132.29

Unbelievable! With TDmixvent500: noise reduction minimum 50%...