CLIVET ELFOFresh2 CPAN-U 70-120 Series - Design criteria; ELFOFresh² size selection; Example

BT15B012GB-00 ELFOFresh² 27
Design criteria
ELFOFresh
2
size selection
ELFOFresh² is available in the sex sizes, with air ow rate respectively of 70 - 120 - 200 - 300 - 500 - 650 m³/h.
The ELFOFresh
2
recovery size is selected according to the air exchange volumes.
In the framework of “residential” ventilation, the calculation of the necessary air ow rate according to the type of house can be performed through the air
renewal method, i.e. the number of times that it is necessary to integrally change the air in the room over a specic period (generally, it is considered as no.
of changes/hour or volumes/hour).
As for houses, it is a good habit to perform air renewals of 0.5 volumes/hour, max. 1 volume/hour.
Example
To illustrate the design criteria of ELFOFresh
2
the following shows a typical application example that focuses on a house of 180 m
2
consisting of 9 rooms. The
table lists the size of the rooms and the air ow rates of the individual rooms calculated on the basis of the size of the selected ELFOFresh
2
.
Room Surface Height Volume Flow-rate
m² m m³ m³/h
Air supply
Livingroom 50 2.7 135 90
1 room 12 2.7 32.4 20
2 room 13 2.7 35.1 20
3 room 25 2.7 67.5 45
Extraction
Study room 14 2.7 37.8 25
Kitchen 24 2.7 64.8 100
1 bathroom 15 2.7 40.5 50
2 bathroom 14 2.7 37.8 50
Other Corridor 13 2.7 35.1 0
If during the planning stage one considers choosing a renewal rate of 0.5 Volumes per hour, the renewal capacity will be the product of the home volume
multiplied by the rate of renewal.
In our example, it will be 486m
3
x 0.5 = 243 m
3
/h.
The size of ELFOFresh
2
to be selected may be 200 or 300 depending on the lower or higher rate of air exchange that is required.
ELFOFresh
2
200 renewal rate = 200/486 =0,41 Vol/h
ELFOFresh
2
300 renewal rate = 300/486 =0,61 Vol/h