CLIVET ELFOFresh2 CPAN-U 70-120 Series - Definition of the supply;extraction grilles; The supply inlets must be positioned according to the type of inlet that is used:; The supply air flow (extraction) must therefore be determined for each single room as follows:; Note: If in one room there is a supply point and a return point...

28 ELFOFresh² BT15B012GB-00
It should be highlighted that the calculated renewal rate refers to the total volume of the house. In fact, since the supply takes place in the noble rooms and
the removal from the technical rooms, the actual renewal in the individual rooms is greater than the total renewal rate.
For example, if we choose to use the ELFOfresh
2
200, the renewal rate in the noble rooms (total noble room volume = 307.8 m
3
) is 200/307.8 = 0.65 Vol/h
while the rate of renewal in the technical rooms (total technical room volume = 143 m
3
) is 200/143 = 1.39 Vol/h.
Dening airow rate for each individual room
The last column of the table shows the air ow rates necessary for each individual room to ensure proper exchange of air. The room designated as corridor
has no supply or extraction grille because it is an area used by the occupants to move between the various rooms and where the renewal air is blown into
the noble rooms for the corridor in order to be sucked into the technical rooms.
The renewal air airow for each noble room can be calculated using the rate for noble rooms, i.e. 0.65 Vol/h multiplied by the volume of the individual room.
Example: living room = 135 m
3
air ow = 135 x 0,65 = 88 m
3
/h rounded to 90 m
3
/h
Similarly the return airow rates for each single room is equal to the rate of renewal in the technical rooms multiplied by the volume of the room.
Example: bathroom = 40,5 m
3
air ow = 40,5 x 1,39 = 56,9 m
3
/h rounded to 50 m
3
/h
Once the air ow rates have been dened for each room you need to dene the type of grille to be used according to the installation (ceiling, wall, oor)
and the best distribution of air in the room.
As you can see in the example, a decision was made to use AIRJET diusers which due to their characteristics, provide adequate air launch which allows the
entire volume of the room to be aected and jointly a modest and conned aeraulic distribution in the false ceiling in the corridor.
In the living room, due to the conformation of the room and maximum airow rate of the AIRJET diuser, a decision was made to split the input ow into
two points.
Note: where the designer would follow the UNI EN 10339 technical regulations, he must consider the overcrowding respecting the requested parameters
of 11 l/s (40m
3
/h) of air renewal per person and at least 4 volumes per hour of air renewal in the bathroom.