301
30.2 Indoor Fan Performance
PQ Diagram
0
20
40
60
80
100
120
140
160
180
15 20 25 30
20 25 30
H
M
L
H
M
L
H
M
L
H
M
L
0
20
40
60
80
100
120
140
160
180
15
Airflow Volume (m
3
/minute)
Airflow Volume (m
3
/minute)
External static pressure 150Pa, 90Pa
External static pressure 140Pa, 70Pa
External static pressure (Pa)External static pressure (Pa)
L
i
m
i
t
l
i
n
e
L
i
m
i
t
l
i
n
e
L
i
m
i
t
l
in
e
L
i
m
i
t
l
i
n
e
L
i
m
i
t
l
i
n
e
L
i
m
i
t
l
i
n
e
L
i
m
i
t
l
i
n
e
L
i
m
i
t
l
i
n
e
H
M
L
H
M
L
0
20
40
60
80
100
120
140
160
180
15 20 25 30
Airflow Volume (m
3
/minute)
External static pressure (Pa)
External static pressure 130Pa, 50Pa
L
i
m
i
t
l
i
n
e
L
i
m
i
t
l
i
n
e
L
i
m
it
li
n
e
H
M
L
H
M
L
H
M
L
H
M
L
0
20
40
60
80
100
120
140
160
180
0
20
40
60
80
100
120
140
160
180
A
15 20 25 30
15 20 25 30
Airflow Volume (m
3
/minute)
Airflow Volume (m
3
/minute)
External static pressure (Pa)External static pressure (Pa)
External static pressure 120Pa, 30Pa
External static pressure 110Pa, 10Pa
L
i
m
i
t
l
i
n
e
L
i
m
i
t
l
i
n
e
L
i
m
i
t
l
i
n
e
L
i
m
i
t
l
i
n
e
L
i
m
i
t
l
i
n
e
L
i
m
i
t
l
i
n
e