Duet is a range of run and standby fans designed to provide extraction levels that comply with Building regulations (Document F) for bathrooms and WC's and incorporates a run on timer. All models offer automatic changeover on fan failure.Ultra quiet and particularly suitable for areas where unobtrusive sound levels are essential, Duet is available for surface, recessed or duct mounting. IP44 rated. Duet meets the requirement of Health Technical Memorandum 2025, foul extract ventilation systems 2.8. Ideal for new build and refurbishment installations.

Duet features include a backdraught shutter, LED indicators showing the status of the unit, self diagnostic check of controls before the fan will start, run and standby facility, 5-25 minute run on timer and 24 hour auto fan changeover. Suitable for ambient temperatures of up to +40°C, built-in dust filters.

Duet is suitable for use with either 100mm diameter ducting or System 50 PVCu ducting, for installations that need concealed ducting, with a minimal ceiling void of only 90mm required. System 50 also combines the advantages of being non-corrodible and nonreverberant with easy installation.

The motors are manufactured with long life self aligning sleeve bearings, impedance protected. Insulation is to Class H.

The housing and fan scroll are manufactured from high quality polymeric materials. The control circuitry is mounted within its own enclosure and the unit is rated IP44.

Adjustable Timer from 5-25 minutes, to comply with Building Regulations , Document F. 24 hour automatic duty share changeover. Any external electro-mechanical switch can be used eg. ThermoSwitch, HumidiSwitch. Double insulated appliance.
Supply voltage 220-240V/1/50Hz

Optional Remote indicator
The remote fan indicator unit provides fan status information at a convenient position remote from the main unit. (Included as standard with Duct Model). Stock Ref. No.18 00 10C

Duet Surface
Requires 100mm circular hole in wall. Fan 1/ Fan 2 running indicators, fault indicator.
Stock Ref. No.18 05 10C

Duet Recessed
Flush-mounted model with 100mm discharge spigot. Two flush-mounted washable filter panels, Fan 1/Fan 2 running indicators, fault indicator.
Stock Ref. No. 18 06 10C

Duet Duct
Sheet metal construction. Up to 2 inlets can be connected. 100mm discharge spigots. A remote indicator is included with this model.
Stock Ref No. 18 07 10C

Remote Indicator
The remote fan indicator unit provides fan status information at a convenient position remote from the main unit.
Stock Ref. No. 18 00 10C

Wall Fitting Kit
For use with Duet range. Hole size 115mm.
Stock Ref. No. 25 41 02 - White 25 41 00 - Brown

Type	Stock Ref. No.	Remote Indicator Stock Ref. No.	Amps @ 240V	Extract Performance		Max Watts	dB(A) 85m³/h
				m³/h	l/s
Surface	18 00 10C	+ 18 00 10C	0.25	122	33	35	Both fans running 37 One fan running 34
Recessed	18 06 10C	+ 18 00 10C	0.25	122	33	35	Both fans running 36 One fan running 33
Duct	18 07 10C	+ 18 00 10C	0.25	122	33	35	Both fans running 36 One fan running 33

Manufacturers of some fluorescent/low energy lighting systems indicate that these can interfere with other electronic/timing circuits. For reliable operation of these circuits we recommend therefore that a tungsten filament light is used.

Wall fitting kit
	White Stock Ref. No. 25 41 02 Brown Stock Ref. No. 25 41 00
Air replacement grille set
	Ivory Stock Ref. No. 56 14 01 Brown Stock Ref. No. 56 14 00
Quck fix 100mm wall grille
	White Stock Ref. No. 56 35 21 Brown Stock Ref. No. 56 35 41
Vent-cowl for connection to 100mm rigid pipe
	Stock Ref. No. 56 14 03
100mm Flexible ducting
	Stock Ref. No. 56 36 04 (3 metre) Stock Ref. No. 56 66 04 (6 metre)
Condensation trap
	Condensation trap for 100mm rigid duct Stock Ref. No. 56 35 16

For full details of system 50 components see the System 50 page.

	A	B	C	D	EØ	F	G
Surface	347	170	224	69	99	35
Recessed	385	233	366	255	98	230	35
Duct	366	233	230	36	98

Duet Surface

Duet Recessed

Duet Duct

Supply and install a Duet run and standby fan suitable for mounting in wall, ceiling or ducted applications as manufactured by

Vent-Axia Ltd
Fleming Way
Crawley
West Sussex
RH10 9YX
Telephone: 01293 526062.

The fan performance should meet building regulations of 30 l/s suitable for bathrooms or utility rooms.

	Information:
	» Description » Motor » Built-in Controls » Controller » Models » Product Specification » Accessories » System 50 Duct Components » Dimensions » Performance » Typical Specification
	Downloads:
	Catalogue Pages Wiring Diagrams O&M Instructions
	Features & Benefits:
	Designed to meet Local Authority run and standby specifications. Quiet operation. Complies with Building Regulation (Document F) requirements. Now with boost running facility. Run and standby facility. Self diagnostic check of controls. Overrun timer as standard, remote PIR's or humidistat can be installed.
	FAQs Answered:
	• Can be ceiling mounted. • Can be used with System 50 flat duct. • The Duet Duct model includes a remote indicator. • Duty sharing fans, automatic changeover. • Built-in or remote LED indicator for fan running and fan failure.