• 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 Run On Timer - 5s - 4hrs - RT5A3 x Elta 3 Amp Electronic single phase speed controller with TK1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5002 x REB-CVF 0-10v Controller4 x MTP 10, 10K, Speed control1 x Easy-fix termination kit - High Rise Ventilator - EFT1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 3551 x Elta Wall Cowl SWC56/631 x GRA-100 External Grill by S&P1 x Elta Wall Cowl SWC35/401 x Elta Louvre Shutter - 400mm1 x Elta Wall Cowl SWC45/501 x Elta Wall Cowl SWC25/311 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 7101 x Jet Cowl - 315mm4 x MWS 3 – Transformer Controller With Motor Protection6 x Multi Input Run On Timer - 0 - 20min - CFCU3 x Elta 10 Amp Electronic single phase speed controller.2 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans3 x Push Timer Switch - ZA41 x ELTA - Single Phase Transformer 2amps2 x Vent Axia ACM 150 inline mixed flow duct fan4 x Electronic extractor fan speed controller - FSC 1.54 x EC6H - Reversible Group Fan Electronic Controller1 x Elta 2 Amp Electronic single phase speed controller.1 x ELTA - Single Phase Transformer 16amps1 x EFSC-3N- Single Phase Speed Control1 x Elta 3 Amp Electronic single phase speed controller.1 x ELTA - Single Phase Transformer 8amps5 x Elta 6 Amp Electronic single phase speed controller with TK1 x ELTA - Single Phase Transformer 12amps1 x AIRVENT speed control - AIR4019611 x COM-31 x ELTA - Single Phase Transformer 4amps1 x EFSC-6N- Single Phase Speed Control3 x Transformer speed controller - ATC1 - 1.5 Amps1 x Elta 6 Amp Electronic single phase speed controller.1 x ELTA - Single Phase Transformer 10amps5 x Isolator Switch - ISOSW3 x Remote Timer Control - 13512 x Single phase speed controller by auto-transformer - RMB 3.5 Amp1 x Helios ZNE Electronic Fan Overrun Timer1 x Time Delay Unit - DT20B2 x BEAS-control module1 x CMT-2 200/80 1.1KW - Single inlet centrifugal fan direct driven2 x 7 Day Programmable TIMECLOCK1 x TTC-2000 Three phase electric heater controller3 x Speed Controller - REB51 x ACOAS/ AC/EC Auto Changeover 8Amp2 x ACO8AC/EC AutoChangeover panel1 x KMBI 180 Connector rectangular/circular to install on the discharge of CMT2 x CPTA-S PIR SENSOR Volt Free Contacts - Surface Mounted1 x Elta ACO Panel 149-ACO14E1 x EC-Vent control board1 x ACO 149-ACO1/EDV1 x EM30-24 Electro-Mechanical Control Panel1 x Elta ACO Panel 149-ACO18B1 x EM30-24 Control Panel Commissioning Service1 x UB47- Universal Insulated Terminal1 x CBT-100N Centrifugal2 x Mini Diffuser - 100mm6 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan2 x Vent Axia ACM 150 T (Timer Model) inline mixed flow duct fan4 x S&P MULTI-REG EC FAN CONTROLLER / INTERFACE3 x Helios TSW 7.5 Amp Transformer speed controller3 x REU 1.5amp Speed control - Two Speed Five-Step Transformer - Trickle and Boost3 x Transformer 5 Speed Controller - ATC1-4TK5 x WS - Reversing Switch from Helios Fans2 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)3 x Vent Axia T-Series Controller3 x Airvent ceiling fan controller2 x TG-R room temperature sensor1 x CONTROL ECOWATT - Basic1 x FAST-TRACK RANGE 75mm - Click Ring (1 bag of 10)3 x Speed Controller - REB1-N2 x Multiflow SMB550/4-1AC1 x EC-Vent Room Unit2 x Transformer (silent) speed controller - RE 3.0 Amp5 x Systemair Save Connect 2.0 Internet Module3 x PIR Sensor - PIR23 x Speed Controller - REB12 x Bathroom Fan -Envirovent- Silent 100 T (Timer Model)2 x Silent 100 Window Kit - windowS2 x PIR Sensor - PIR41 x QPTW 250C Acoustic Twin Fan with Controller2 x TG-K Duct temperature sensor2 x VTR 300 STD Filter Kit1 x SAVE VSR 300 heat recovery unit1 x Silentub - STUB 1001 x VEKA INT 2000/15.0-L1 EKO1 x TD160-NT Mixvent - 100mm - TD160 Timer1 x CBM Low Pressure Centrifugal Fan - CBM 12/12 6 Pole 736watt CVR1 x CSB-60 Centrifugal fan3 x Single phase speed controller by auto-transformer - RMB 10.0 Amp2 x Contactor Interface Station - CI91 x CBA-100 Inlet Flange for CBT-1005 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan3 x CPTA-E Flush mounted PIR sensor with timer3 x Remote controller FLEX - for VEKO INT3 x Helios TSW 3 Amp Transformer speed controller1 x Vent Axia ACM 100 inline mixed flow duct fan1 x DEF-140T Inlet Guard for the CBT-100N5 x MWS 1.5 – Transformer Controller With Motor Protection2 x Helios HQW-630/4 - IP551 x CBS-60 Outlet Flange for CSB/CBT-605 x TG-K3/NTC10-01 - Duct temperature sensor1 x Transformer (silent) speed controller - RE 1.5 Amp1 x ENV 100 12v transformer SELV1 x Elta - Room Sensor - Temp/Humid/C022 x Envirovent 4 Way Remote Control Switch - SWHBKRF-43 x Temperature Fan Speed Controller - ATCP4-WMS2 x REU 7amp Speed control - Two Speed Five-Step Transformer - Trickle and Boost2 x Transformer 5 Speed Controller - ATC1-8TK1 x Helios TSW 0.3Amp Compact Transformer speed controller3 x CS2 Current Switch2 x Helios TSW MCB Amp Transformer speed controller2 x KMBI 225 Connector rectangular/circular to install on the discharge of CMT5 x Vent Axia ACM 125 inline mixed flow duct fan2 x Single phase speed controller by auto-transformer - RMB 8.0 Amp4 x Single phase speed controller by auto-transformer - RMB 1.5 Amp2 x Helios HQW-200/2 - IP552 x REE-1 Electronic Speed Controller3 x Transformer Speed Control - RTRE- 12.0Amp1 x Speed Controller - REB33 x Speed Controller - REB104 x Commercial Single or 3 phase Fan Reversing Switch - RS11 x Transformer (silent) speed controller - RE 5.0 Amp3 x Skyflow SSR Horizontal Roof Cowl SSR31/35B3 x Skyflow SSR Horizontal Roof Cowl SSR31/35BS2 x CMT-2 225/090 1.1KW - Single inlet centrifugal fan direct driven1 x MWS 5 – Transformer Controller With Motor Protection Unit1 x RDS 11 Helios Transformer Controller With Motor Protection3 x Helios TSW 1.5 Amp Transformer speed controller2 x Transformer 5 Speed Controller - ATC1-10TK2 x Vent Axia ACM 200 inline mixed flow duct fan3 x Elta Variable Speed Drive IP66 - 0.37KW (1ph to 3ph)2 x Vortice Quadro Micro 100 I - Standard Version1 x FFR 355 Filter Cassette1 x DDMP 12-12 3F 1810W M6A4 DG03 x Helios HQW-315/4 - IP552 x Elta Variable Speed Drive IP66 - 2.2KW1 x Elta Variable Speed Drive IP66 - 4.0KW1 x CBM Low Pressure Centrifugal Fan - CBM 10/10 4 Pole 550watt CVR1 x TUNE-R-200-3-M4 - Control Damper2 x Vent Axia Silent 100T (TIMER)1 x Compact SCD450/4-1AC1 x CBM Low Pressure Centrifugal Fan - CBM 10/10 4 Pole 550watt VR1 x Speed Controller - REB164 x Transformer Speed Control - RTRE- 1.5Amp2 x DEF-CBM-RE-7 - Protection Guard4 x Transformer 5 Speed Controller - ATC1-2TK1 x Transformer 5 Speed Controller - ATC1-12TK2 x MV-B Dual Switch for use with Helios HQW plate fans,2 x Envirovent G4 Filter - SL-G4/F71 x Transformer Speed Control - RTRE- 5.0Amp1 x Skyflow SSR Horizontal Roof Cowl SSR80B1 x CBA-60 Inlet Flange for CBT-603 x MTS10- extractor fan 3 step switch1 x Helios HQW-200/4 - IP551 x MEV Spider Wireless boost Switch - MEV-SWH-W1 x TD Mixvent 800/200 EEXEIIT31 x Helios HQW-250/4 - IP551 x RTRD - Three Phase Speed Controller - 2 Amp1 x ERR 20/1 Centrifugal inline fan1 x ERR 31/1 Centrifugal inline fan1 x Silent 300 CZ Design PLUS Extractor Fan1 x DDMP 09/09 Mounting Flange2 x Transformer Speed Control - RTRE- 7.0Amp1 x FRQ5-10A Inverter Speed controller1 x Helios PU10 Speed Potentiometer (Flush Mounted)1 x GXC6EC - High Performance Extract Fan2 x SG-200 Fan Guard for the HQW 2001 x Round ceiling diffuser 400mm1 x RDS 7 Helios Transformer Controller With Motor Protection1 x Vent Axia SC5001 - Speed controller1 x TEM 075 - 5 Speed Transformer Speed Control1 x RDH FLEX-SQUARE - ADH/RDH 04501 x Speed Controller - REB81 x Elta Variable Speed Drive IP66 - 0.75KW1 x ELM 18 EX Flexible Cuff for ERM 18
Reviews
DAOSL Back Draft Damper
DAOSL Back Draft Damper
£ 11.49

Look good, works well, except the shaft of the lanellae cuts...