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Extract air
Install the extract air valves in high-humidity rooms and place them strategically where they can extract humid and vitiated air from
the dwelling/building most efficiently.
High-humidity rooms are, for example:
• Bathroom
• Lavatory
• Kitchen
• Utility room
Supply air
Install supply air valves in living areas. Place them strategically so they cause minimum discomfort. It is, for instance, not recommend
-
ed that you install supply air valves in areas where people are inactive, as the supply air may be experienced as draughty.
Living areas may be, for example:
• Living room
• Family room
• Bedroom
• Study
Roof terminals
The position and design of air intake and air discharge should limit pressure oscillations in the ventilation unit caused by wind. Their
position should also prevent birds and other animals from getting in. Finally, the position and design should ensure that air intake and
the connected duct system are kept free of plants and foreign objects.
You must place the air intake so that the risk of a short-circuit from the discharge air is minimised, and with attention to the prevailing
wind direction.
The air intake should be placed at least 50 cm above the roof surface. On black, flat roofs the distance from the roof to the underside
of the intake should be at least 1 m. This will ensure that warm air is not drawn into the building during summer. Air intakes should be
placed on the northern or eastern sides of pitched roofs.
You should also install a silencer between the unit and the roof stacks to prevent noise disturbance to your surroundings.
Installation example
