Daikin VAM-FA8VE, Technical Data Manual

Page: 13 / 282

• HRV • Heat Reclaim Ventilation
11
• HRV • VAM-FA8VE
1
6
6 Selection Procedures
Various methods are used to calculate the required ventilating airflow rate according to CO
2
generated by inhabitants in a room, waste gas
generated by use of fire, and other conditions of a room.
Here are 2 patterns of calculating methods.
6-1 Based on inhabitants
A: 20
×
Living room floor space (m
2
)
B: Area occupied per person (m
2
)
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
3
/ h / person)”,
which is the required ventilating air flow rate based on the
CO
2
exhausted by an adult sitting still in a room. If smoking is
allowed, other calculation method should be used.
2. Use 10 (m
2
) if the area occupied per person exceeds 10 (m
2
).
<Table 1>
*: Values set by the Metropolitan Maintenance Bureau in Japan.
Note:
1. Table indicates the required ventilating air flow rate
calculated as 20 m
3
/ h.
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.
6-2 Based on Room size
C: Number of ventilation required per hour (ventilation / h)
D: Area of room (m
2
) (See Table 3 of the following page)
E: Height of Ceiling (m) (See table 2)
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. 9.9 (m
2
)
Height of ceiling: 2.4 m
Required ventilating air flow rate =
Required ventilating air flow rate and the unit size
such as 150, 250, 350 .............. 2000 are almost equal.
So select the close size of the unit.
In this case, select VAM150FJVE.
<Table 2>
Note:
Refer to the following pages for the tables.
Type of building
Area occupied
per person (N)
Remarks
Eating houses,
restaurants,
coffee-shops
3 m
2
Floor space of a part used for
business purposes.
Cabarets, beer
halls
2 m
2
Floor space of a part used for
business purposes.
Japanese-style
restaurants, hall
for hire
3 m
2
Floor space of a part used for
business purposes.
Store market
3 m
2
Floor space of a part used for
business purposes.
Pool rooms, Ping-
pong rooms,
dance halls,
bowling alleys
2 m
2
Floor space of a part used for
business purposes.
Pin-ball parlors,
Go club houses,
mahjong parlors
2 m
2
Floor space of a part used for
business purposes.
Inns, hotels, and
motels
10 m
2
Floor space of a part used for
business purposes.
Massage parlors
5 m
2
Floor space of a part used for
business purposes.
Meeting places,
public halls
0.5 – 1 m
2
Persons accommodated
simultaneously with the
number of persons calculated
per unit.
Offices 5 m
2
Floor space of an office.
Required ventilating
air flow rate (m
3
/ h)
20
×
A
B
=
Required ventilating
air flow rate (m
3
/ h)
C
×
D
×
E =
6
×
9.9
×
2.4
143 (m
3
/ h)
=
.
.
Groups Type of room
Ventilation
required
Common
household
Living room,
bathroom,
drawing room,
toilet,
kitchen 6
6
6
10
15
Eating
places
Restaurant, sushi
restaurant,
banquet hall,
tempura
restaurant,
cooking room 6
6
10
20
20
Inns and
hotels
Guest room,
corridor,
dance hall,
large dining hall,
washroom, toilet,
cooking room,
laundry room,
engine room,
boiler room 5
5
8
8
10
15
15
20
20
Hospitals
Consultation office,
sick room,
office room,
corridor,
waiting room,
bathroom,
dining room, toilet,
respiratory disease room,
laundry room,
cooking room,
surgery room,
sterilizing room,
engine room,
boiler room 6
6
6
10
10
10
10
10
15
15
15
15
20
20
Schools
Class room, library,
auditorium,
experimental
chemistry room,
gymnasium,
toilet,
cooking room 6
6
6
8
12
15
Groups Type of room Ventilation
required
Playhouses
and movie
theaters
Audience room,
corridor,
smoking room,
toilet,
projector room 6
6
12
12
20
Plants
Office room,
general work
room,
telephone room,
spinning plant,
printing plant,
battery room,
machinery plant,
generator room,
substation room,
painting shop,
welding plant,
chemical plant,
food plant,
wood working
plant,
casting plant
6
6
6
10
10
10
10
15
15
15
15
15
20
20
50
General
buildings
Office room,
waiting room,
show room, toilet,
conference room 6
10
10
12
Comfort
stations
20
Dark
rooms Dark rooms for
photo
16
Guest
rooms of
ship
6
Room of potential noxious
gas or combustible gas 20 or
more