Duet Twin Fans - Run & Standby Fans
• Designed to meet Local Authority run and standby specifications
• Quiet operation
• Meets current Building Regulations Approved Document F
• Run and standby facility
• Self diagnostic check of controls
• Overrun timer as standard
• Remote PIR’s or humidistat can be installed
Duet is a range of run and standby fans designed to provide extraction levels that comply with Building regulations Document Ffor 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. 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 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.
Double insulated appliance.
Supply voltage 220-240V/1/50Hz.
Duet is suitable for use with 100mm diameter ducting or flat ducting, for installations that need concealed ducting, with a minimal ceiling void of only 90mm required.
Motor
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.
PRODUCT SPECIFICATION:
Built In Controls
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
Controller
Optional 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
Single fan only performance
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.
PERFORMANCE:
Performance
DIMENSIONS:
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 |

Requires 100mm circular hole in wall. Fan 1/ Fan 2 running indicators, fault indicator.

Flush-mounted model with 100mm discharge spigot. Two flush-mounted washable filter panels, Fan 1/Fan 2 running indicators, fault indicator.

Sheet metal construction. Up to 2 inlets can be connected. 100mm discharge spigots.

100mm Wall Fitting Kits (White) For installing into most walls using the telescopic liners supplied.



Suitable for fitting to doors and panels to allow better internal air circulation and replacement. Consists of a two-piece telescopic set, which fits unobtrusively on either side of the door panel. Minimum fixing thickness 30mm. Plastic. Dimensions: 454 x 90mm.





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ESTIMATED RUNNING COSTS
Calculate estimated running costs for this product using the tool below.
For average costs*, leave the default values in place or enter your own figures in the boxes to recalculate.
Where a product has multi speeds, a typical installation has been used for the below calculations. *Running cost does not include the use of the heater on the heater model
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Overview
Duet is a range of run and standby fans designed to provide extraction levels that comply with Building regulations Document Ffor 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. 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 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.
Double insulated appliance.
Supply voltage 220-240V/1/50Hz.
Duet is suitable for use with 100mm diameter ducting or flat ducting, for installations that need concealed ducting, with a minimal ceiling void of only 90mm required.
Motor
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.
Technical
PRODUCT SPECIFICATION:
Built In Controls
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
Controller
Optional 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
Single fan only performance
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.
PERFORMANCE:
Performance
DIMENSIONS:
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 |
Models

Requires 100mm circular hole in wall. Fan 1/ Fan 2 running indicators, fault indicator.

Flush-mounted model with 100mm discharge spigot. Two flush-mounted washable filter panels, Fan 1/Fan 2 running indicators, fault indicator.

Sheet metal construction. Up to 2 inlets can be connected. 100mm discharge spigots.
Accessories

100mm Wall Fitting Kits (White) For installing into most walls using the telescopic liners supplied.



Suitable for fitting to doors and panels to allow better internal air circulation and replacement. Consists of a two-piece telescopic set, which fits unobtrusively on either side of the door panel. Minimum fixing thickness 30mm. Plastic. Dimensions: 454 x 90mm.




