For use with intermittent extract ventilation and Mechanical Extraction Ventilation (MEV) systems.
|Kit - Background Ventilators - Telescopic - Round - Diffuser - Env Filter - Ø100mm**||
|Accessories to 2404:|
|Wall Liner Acoustic Treatment||4SLWL||-|
|Kit - Background Ventilators - Telescopic - Round - Damper - Ø125mm||508W||
**2706 (Equivalent area 2857mm²). 7.1l/s @ 10Pa exhaust air heat pump specific.
Kits are available with different terminal colours. Where kit terminals are available in different colours, the component code is marked with an asterisk(*).
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Selecting the correct specification of background ventilation is explained in section 5 of Approved Document F of Building Regulations (p19).
Background Ventilators should be located to avoid draughts, typically 1.7m above floor level.
Background Ventilators should be located in all rooms with external walls.
- At least 5000mm² total equivalent area of ventilation should be provided in each habitable room and 2500mm² equivalent area in each wet room
- For rooms with no external walls, detailed guidance is given in paragraphs 5.14 to 5.16 of Approved Document F
General Technical Installation Tips:
- To ensure appliance efficiency and reduce any system noise:
- Choose the shortest and most direct routes
- Minimise the use of bends and use 2 x 45° instead of 90° bends wherever possible
- Seal joints with DDSEAL acrylic sealant
- Use rigid round duct wherever possible
- Use the largest appropriate size of duct
- Avoid using flexible hose wherever possible
- Check the extraction capability and connection