Ventilation Openings; Removal Of Stale Air - VENTILAIRSEC VMI PUREVENT Installation And Maintenance Manual

3.3.4 Ventilation openings

3.3.4.1 Installation of a distributed unit (recommended for new construction)
Installation of a distributed unit means that each room in use has to have a ventilation opening.
Opening dimensions by room type
Room
LIVING ROOM – DINING ROOM open-plan
LIVING ROOM separate
DINING ROOM separate
BEDROOM
OFFICE
3.3.4.2 Installation of a centralised unit (recommended for renovations)
Installation of a centralised unit involves the installation of at least one opening in a neutral area
(hallway, staircase etc.) as central as possible within the building to be ventilated.
We recommend a minimum of two ventilation openings for areas larger than 110 m² or at least one
opening per floor.
The recommended opening diameter is 160 mm.

3.3.5 Removal of stale air

3.3.5.1 With a single unit
The legislation applicable within the country of installation must be complied with. For further
information, please contact our technical department.
3.3.5.2 With a centralised unit
All rooms in the premises, even if they have no windows or do not have an outside wall, must be
equipped with a natural air extraction point (trickle vent, wall duct). If they do not, extraction points
must be made following standard practice.
To correctly adjust the extraction grilles, distribute 90% of the air blown into the premises between all
of the rooms.
Measures must be taken to avoid gas backdrafts in the room from the exhaust pipes of gas appliances
or other open fire appliances (for the duct fans and the partition wall fans).
All other extraction devices installed under other regulations (e.g. gas appliances) must not be altered.
3.3.5.3 Door undercuts
Undercuts must be made under all doors in the premises. The space required between the floor and
the bottom of the door is as follows:
▪
1 cm for all doors including the kitchen door if the kitchen has at least two access doors.
▪
2 cm for the kitchen door if the kitchen has only one access door and for all doors to rooms
equipped with an appliance connected to the gas supply.
Diameter in mm
125
80
80
80
80
31