Installation Instructions
Installing ductwork and electrical supply
Important note: This unit is for wall or floor mount only. Ceiling mounting unit are
configured differently and should be ordered separately.
1. Locate external terminations (supply and extract) in accordance with the latest
of the Domestic Ventilation Compliance Guide.
2. Ductwork from the unit is Ø125mm dia. - maximise duct size where possible. Make
sure that the ductwork is insulated in unheated spaces. Minimise flexible duct.
3. Locate the mains supply within 1m of the location
of unit. The position of the
power supply or unit (a fused switched isolator) must not be mounted above or closer
than 1m to a cooker where it could be affected by excessive heat or moisture.
4. Make sure that there is room for the MVHR unit. The unit is designed to be wall
mounted. It can also be floor mounted with an additional kit. Part number 90000558
5. Also make sure that there is a free space at the front of the appliance for cleaning
filter and carrying out maintenance on the appliance.
to the unit/air flow directions
Installed example, RH unit shown.
A – No exhaust within 2m of air inlet
B – Inlet duct from atmosphere
C – Outlet duct to atmosphere
D – MVHR
E – Ducts to and from property
F – Condense Drain
Note: Important – if installed in a loft space the area should be within the insulated
envelope to maintain optimum performance
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