Datasheet

33
Concepts
BASIC VENTILATION CONCEPTS
Sound pressure level (dB)
Noise dB Examples
DEAFENING
120
Thunder
110
Cannon fire
Steam whistle
VERY STRONG
100 Train in a tunnel
90
Street with dense traffic
80 Noisy factory
STRONG
70
Noisy office
60
Medium-sized workshop
Radio with the
volume up high
MODERATE
60
Large shop
50
Office
GENTLE
40
Public library
30
Country road
Scrunching up paper
Quiet conversation
VERY GENTLE
20 Peaceful church
10 Silent night
0 Hearing limit
HOW TO CHOOSE A FAN
You need to know the following parameters:
•
Output
•
Pressure
•
Sound level
•
Type of Electricity Supply
Output (Q m
3
/h): You have to determine the necessary
flow according to:
1
•
The recommended renewals with regard to the volume
of the premises in m3 and the activity there.
Q = m3 * Renow/h
RENEW./HOUR TABLE
Result of Health and Safety studies/Experience
INDUSTRIAL PREMISES
Noxious atmospheres 30-60
Goods deposit 3-6
Cast-iron 20-30
Industrial laundry 15-30
Machine room 20-30
Workshop (general) 8-10
Workshop with kilns 30-60
Tooling workshop 5-10
Paint workshop 30-60
Welding workshop 15-30
Dry cleaner 20-30
SERVICES SECTOR AND PREMISES NR/h
Classroom 2-4
Bank 3-4
Bar-café 10-12
Library 3-5
Cinema-theatre 10-15
Industrial kitchen 15-30
Canteen 5-10
Recording studio 10-12
Garage 6-8
Gym 6-12
Entrance hall 3-5
Hospitals 4-6
Public lavatories 8-15
Laundry 15-30
Offices 4-8
Baker’s 20-30
Restaurant 5-10
Dance hall 6-8
Conference room 8-12
Hairdressing salon 10-15
Meeting room 4-8
2
•
The recommended renewals with regard to the number
of people that there are in the premises.
Q = nº person * m
3
/h
Normal activity with no smoking 29 m
3
/h per person
Normal activity with smoking 58 m
3
/h per person
Light physical activity 45 m
3
/h per person
Industrial warehouses and premises 60 m
3
/h per person