Selection Procedures (In Japan) - Daikin VAM-FA8VE Technical Data Manual

6 Selection Procedures (in Japan)

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• HRV • VKM-GA(M)V1
Various methods are used to calculate the required ventilating air flow rate according to CO
inhabitants in a room, waste gas generated by use of fire, and other conditions of a room.
Here are 2 patterns of calculating methods.
Based on inhabitants
Required ventilating
=
3
air flow rate (m / h)
A : 20 × Living room floor space (m
B : Area occupied per person (m
The above equation conforms to article 20, 2
No.2 of the Building Standards Act in Japan.
Note :
1. 20 (in the above equation) means "20(m
rate based on the CO
2
calculation method should be used.
2
2. Use 10 (m ) if the area occupied per person exceeds 10 (m
<Table 1>
Type of building
Dining houses, restaurants, coffee-shops
Cabarets, beer halls
Japanese-style restaurants, hall for hire
Store market
Pool rooms, Ping-pong rooms, dance
halls, bowling alleys
Pin-ball parlors, Go club houses,
mahjong parlors
Inns, hotels, and motels
Massage parlors
Meeting places, public halls
Offices
* : Values set by the Metropolitan Maintenance Bureau in Japan.
Note :
1. Table indicates the required ventilating air flow rate calculated as 20 m
2. The area occupied per person by type of business is calculated in reference to Application
Standards for building administration in compliance with Building Standards Act in Japan.
Based on Room size
Required ventilating
3
air flow rate (m / h)
C : Number of ventilation required per hour (ventilation / h)
2
D : Area of room (m )
E : Height of Ceiling (m)
Calculation is based on the experiences of hygienic laboratory, etc. to find out the number of hourly
ventilation of the room air.
(Selection example)
Place : Living room of common household
Required ventilation : 6 times / h (See Table 2)
Area of room : Approx. 30 (m
Height of ceiling : 2.4 m
Required ventilating air flow rate = 6 × 30 × 2.4
Required ventilating air flow rate 500 is almost equivalent to the unit type 50.
So select the close size of the unit.
In this case, select VKM50GAMV1.
• HRV • Heat Reclaim Ventilation
20 × A
B
2
)
2
)
3
/ h / person)", which is the required ventilating air flow
exhausted by an adult sitting still in a room. If smoking is allowed, other
Area occupied per
person (N)
2
3 m
2
2 m
2
3 m
2
3 m
2
2 m
2
2 m
2
10 m
2
5 m
2
0.5 – 1 m
2
5 m
C × D × E
=
2
)
= . .
432 (m
2
2
).
Remarks
Floor space of a part used for business
purposes
Floor space of a part used for business
purposes
Floor space of a part used for business
purposes
Floor space of a part used for business
purposes
Floor space of a part used for business
purposes
Floor space of a part used for business
purposes
Floor space of a part used for business
purposes
Floor space of a part used for business
purposes
Persons accommodated simultaneously with
the number of persons calculated per unit
Floor space of an office
3
/ h.
3
/ h)
generated by