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CHAPTER 10
Ventilation Standards in Each Country
1. Ventilation Standards in Each Country
1. Japan
Table Summary of Laws Related to Ventilation
Item
Related Laws
Law for Maintenance of
Sanitation in Buildings
The Building Standard Law of
Japan
Industrial Safety and Health
Act
96
Acceptable Range
Buildings of at least 3,000 m
2
schools, at least 8,000 m
)
Buildings with requirements for
ventilation equipment
1) windowless rooms.
2) rooms in theaters, movie
theaters, assembly halls, etc.
3) kitchens, bathrooms, etc.
Rooms with equipment or devices
using fire.
Offices where workers work.
(Office sanitation regulated
standards)
Room Environment Standard Values
If a central air quality management system or mechanical
ventilation equipment is installed, comply with the standard target
values shown in the table below.
Impurity volume of less than 0.15 mg per 1 m
floating particles
CO rate
2
(for
CO
rate
2
Temperature
Relative humidity
Ventilation
Central air quality management system ventilation capacity and
characteristics
Effective ventilation capacity V
Af: floor space (m
Characteristics: Generally satisfy the table below.
Impurity volume of less than 0.15 mg per 1 m
floating particles
CO rate
CO
rate
2
Temperature
Relative humidity
Ventilation
For general ventilation, the effective ventilation area opening is
at least 1/20 of the floor space and the ventilation equipment
installed gives a CO density of 50 ppm and CO
ppm or less. If a central air quality management system or
mechanical ventilation equipment is installed, comply with the
standard target values shown in the table below.
Impurity volume of Air (1 atmospheric pressure, 25°C)
floating particles
CO rate
CO
rate
2
Air flow in room
Heat and humidity
conditions
air
Less than 10 ppm. (Less than 20
ppm when outside supply air has
a CO rate of more than 10 ppm.)
Less than 1,000 ppm.
1) Between 17°C and 28°C
2) When making the room
temperature cooler than the
outside temperature, do not
make the difference too great.
40% - 70%
less than 0.5 m/sec
3
20Af/N (m
2
), N: floor space occupied by one person
air
Less than 10 ppm.
Less than 1,000 ppm.
1) Between 17°C and 28°C
2) When making the room
temperature cooler than the
outside temperature, do not
make the difference too great.
40% - 70%
less than 0.5 m/sec
less than 0.15 mg per 1 m
Less than 10 ppm. (Less than 20 ppm
when outside supply air has a CO
rate of more than 10 ppm.)
Less than 1,000 ppm.
Air speed in room is less than
0.5 m/s, and air taken into the room
does not blow directly on or reach
specific workers.
Heat between 17°C - 28°C
Relative humidity 40% - 70%
3
of
)
3
of
density of 5,000
2
3
of air
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