• 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 JSR 200 Painted RAL50181 x Balance S Diffuser - NO RING - 100mm1 x CONTROL ECOWATT - Basic1 x EC-Vent control board1 x ACO 149-ACO1/EDV1 x EM30-24 Electro-Mechanical Control Panel2 x Systemair Save Connect 2.0 Internet Module1 x EC-Vent Room Unit1 x Elta ACO Panel 149-ACO18B1 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection1 x EM30-24 Control Panel Commissioning Service1 x NKS-D swirl diffuser v-300 x 300mm1 x PCA Diffuser - PCA-3151 x Elta ACO Panel 149-ACO14E2 x Transformer 5 Speed Controller - ATC1-4TK1 x RDS 11 Helios Transformer Controller With Motor Protection1 x Helios TSW MCB Amp Transformer speed controller1 x Helios TSW 10 Amp Transformer speed controller1 x Helios TSW 1.5 Amp Transformer speed controller1 x RTRD - Three Phase Speed Controller - 2 Amp1 x RDS 7 Helios Transformer Controller With Motor Protection3 x Vent Axia ACM 125 inline mixed flow duct fan2 x Temperature Fan Speed Controller - ATCP4-WMS1 x CS2 Current Switch1 x Vent Axia ACM 150 inline mixed flow duct fan2 x MV-B Dual Switch for use with Helios HQW plate fans,2 x Isolator Switch - ISOSW1 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan1 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans2 x Vent Axia ACM 100 inline mixed flow duct fan2 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)1 x CMT-2 200/80 1.1KW - Single inlet centrifugal fan direct driven1 x Single phase speed controller by auto-transformer - RMB 10.0 Amp1 x TG-K Duct temperature sensor2 x Elta 6 Amp Electronic single phase speed controller with TK1 x 7 Day Programmable TIMECLOCK2 x MWS 1.5 – Transformer Controller With Motor Protection1 x KMBI 180 Connector rectangular/circular to install on the discharge of CMT2 x WS - Reversing Switch from Helios Fans1 x Transformer 5 Speed Controller - ATC1-12TK1 x Two Speed Switch - REGUL-21 x DEF-140T Inlet Guard for the CBT-100N1 x Helios HQW-630/4 - IP552 x CBS-60 Outlet Flange for CSB/CBT-603 x Transformer (silent) speed controller - RE 3.0 Amp1 x FAST-TRACK RANGE 90mm - Click Ring (1 bag of 10)2 x Helios HQW-200/4 - IP551 x Remote Timer Control - 13512 x Skyflow SSR Horizontal Roof Cowl SSR31/35B1 x Transformer (silent) speed controller - RE 1.5 Amp1 x Electronic extractor fan speed controller - FSC 1.52 x Skyflow SSR Horizontal Roof Cowl SSR31/35BS1 x Vent Axia ACM 200 inline mixed flow duct fan1 x Speed Controller - REB32 x Commercial Single or 3 phase Fan Reversing Switch - RS11 x Speed Controller - REB51 x MWS 3 – Transformer Controller With Motor Protection2 x FAST-TRACK RANGE 75mm - Click Ring (1 bag of 10)1 x Helios TSW 3 Amp Transformer speed controller1 x Single phase speed controller by auto-transformer - RMB 3.5 Amp1 x Elta Variable Speed Drive IP66 - 0.75KW1 x Helios PU10 Speed Potentiometer (Flush Mounted)1 x Helios HQW-315/4 - IP551 x Elta 3 Amp Electronic single phase speed controller with TK1 x Transformer 5 Speed Controller - ATC1-2TK1 x Transformer Speed Control - RTRE- 7.0Amp1 x SG-200 Fan Guard for the HQW 2001 x Speed Controller - REB61 x Transformer 5 Speed Controller - ATC1-8TK1 x Transformer 5 Speed Controller - ATC1-10TK
LINEO 200 QUIET
LINEO 200 QUIET
£ 293.00 now £ 235.00
Reviews
EM 250-E2M 01- Etamaster-250
EM 250-E2M 01- Etamaster-250
£ 128.80

Really well made but comes with no speed controler? ?and can...