Technical Information is available for ventilation system designers, specifiers and installers to assist you in choosing the optimum GONAL system, assuring the lowest resistance with the best performance.
To ensure the correct ventilation/ extraction current building regulations demand that you take into account different factors. Those are extractor ventilation fan, the extraction and flow ratio (l/s o m3/h), ducting circuit configuration, its length, pressure loss(Pa),etc.
| Room |
Rapid ventilation |
Background ventilation |
Extractor fan |
 |
Habitable room
|
|
1/20 of floor area
|
8.000 mm2
|
-
|
 |
Kitchen
|
|
Window
|
4.000 mm2
|
30 l/s near worktop
|
 |
Utility room |
|
Window
|
4.000 mm2
|
15 l/s
|
 |
Bathroom
|
|
Window
|
4.000 mm2
|
15 l/s
|
 |
Toilet room
|
|
Window
|
4.000 mm2
|
-
|
- Domestic building
- Without window
- Same conditions with extractor fan, with 15 minutes automatic overrun.
| Room |
Rapid ventilation |
Background ventilation |
Extractor fan |
| |
Habitable room
|
|
1/20 of floor area
|
< 10 m2 4.000 mm2
< 10 m2 4.000 mm2 |
Non-smoking area 8 l/s/pers.
Smoking area 16 l/s/pers. |
| |
Kitchen
Domestic Type |
|
Window
|
4.000 mm2
|
30 l/snear worktop
60 l/s elsewhere |
| |
Bathroom
|
|
Window
|
4.000 mm2
|
15 l/s
|
| |
Toilet room
|
|
1/20 of floor area
|
4.000 mm2
|
6 l/s/wc or 3 ACH |
- Non Domestic building
-
Without window
- Same conditions with extractor fan, with 15 minutes automatic overrun or manual control or occupant detecting.
-
All new domestic buildings and extensions must comply with F1 building regulations and provide ventilation in
kitchens, utility rooms, bathrooms and WCs.
It is essential to make the flow calculation of the area to be ventilated, to make the correct choice of GONAL ducting system.
This calculation is made by multiplying the volume by the ACH (air changes per hour) Please, see attached chart with some examples according to the current regulations.
To assure a clean air environment, always use the appropriate fan for your ventilation requirements.
By using a superior GONAL system you will be prepared for any unforeseen demand.
| Room |
Air changes
per Hour |
Example |
Room volume |
Necessary Flow |
Recommended System |
| |
Room
|
|
2-4 ACH
|
Room
5 x 3 x 2,60 m
|
5x3x2,60 = 39 m3
|
from 78 m3/h |
System 100 (600) |
| |
Kitchen
|
|
10-15 ACH
|
Kitchen
5 x 3 x 2,60 m |
5x4x2,60= 52 m3
|
from 780 m3/h |
System 150 (SUPRA) |
| |
Utility room |
|
15-20 ACH
|
Utility room
4 x 3 x 2,60 m |
4x3x2,60= 31,2 m3
|
from 468 m3/h |
System 120 (800)
System 125 (DUPLA) |
| |
Bathroom
|
|
12-16 ACH
|
Bathroom
4 x 4 x 2,40 m |
4x4x2,40= 38,4 m3
|
from 230 m3/h |
System 120 (800)
System 125 (DUPLA) |
| |
Toilet room
|
|
3-10 ACH
|
Toilet room
3 x 2 x 2,40 m |
3x2x2,40= 14,4 m3
|
from 144 m3/h |
System 100 (600) |
|
