Mitsubishi Electric Lossnay LGH-15RX3 Technical Manual page 119

CHAPTER 10 G Ventilation Standards in Each Country
1.2.2 About ventilation capabilities, etc.
For regular buildings, omitting central air quality management devices, there are no regulations regarding ventilation
capabilities and such. (For regular buildings with central air management devices, the characteristics that the device should
have are the same as for buildings designed for a special purpose). The capabilities and such demanded for buildings
designed for special purposes are shown below.
(1) Natural ventilation device dimensions (omitted)
(2) Effective ventilation capacity of mechanical ventilation devices
When installed in windowless rooms
G
Effective ventilation capacity of mechanical ventilation devices when installed in windowless rooms
20Af
V =
N
V: effective ventilation capacity (m
2
Af = S-20s (m )
S: Room floor space (m
s: effective ventilation area (m
N: Actual conditions applying to floor space occupied by one person (m
S
{ = (when
n
N
= 10 (when
n: Occupancy of room
* The capabilities of supply/exhaust devices must be considered with respect to overall pressure loss in the ventilation
path.
When installed in rooms intended for use by assemblies
G
Effective ventilation capacity of mechanical ventilation devices when installed in rooms intended for use by assemblies
20Af
V =
N
V: effective ventilation capacity (m
2
Af = S (m )
S: Room floor space (m
N: Actual conditions applying to floor space occupied by one person (m
S
= (when
{
n
N
= 3 (when
n: Occupancy of room
When installed in rooms where combustion devices are used
G
Effective ventilation capacity of mechanical ventilation devices when installed in rooms where combustion devices are used
V 40 kQ
V : effective ventilation capacity (m
k : unit of volume of theoretical waste gas per combustion volume (See "Theoretical waste gas volume"on the next page.)
Q : Volume of fuel consumed in actual conditions
Caution
Simple ventilation or simple air exchange does not mean supplying fresh air (O: 21%, N: 79%) to a room with no
environmental hindrances. Therefore, when effective ventilation is converted into regular mechanical ventilation capacity, it
becomes at least 40 m
116
3
/h)
2
)
2
)
S
10)
n
S
> 10)
n
3
/h)
2
)
S
3)
n
S
> 3)
n
3
/h)
3
/person·h, so caution is necessary.
2
)
2
)