Static pressure[Pa]
Airflow rate [m
3
/min]
Static pressure[Pa]
Airflow rate [m
3
/min]
Static pressure[Pa]
Static pressure[Pa]
Airflow rate [m
3
/min]
Airflow rate [m
3
/min]
Static pressure[Pa]
Airflow rate [m
3
/min]
Airflow rate [m
3
/min]
Static pressure[Pa]
−
150
−
125
−
100
−
75
−
25
−
50
0
50
25
0
0.2
0.4
0.6
0.8
1
1.2
1.4
−
200
−
150
−
100
−
50
0
50
0
1
2
3
4
5
6
−
150
−
200
−
100
−
50
0
50
0
1
2
3
4
5
6
−150
−200
−100
−50
0
50
0
0.2
0.4
0.6
0.8
1
1.2
1.4
1.6
1.8
−
150
−
200
−
100
−
50
0
50
0
1
2
3
4
5
6
7
−150
−200
−100
−50
0
50
0
1
2
3
4
5
7
6
2 - inlet
2 - inlet
2 - inlet
1 - inlet
1 - inlet
1 - inlet
2 - inlet
1 - inlet
23
22
23
OCH728A
l
PLFY-M20/25/32/40/50/63/80VEM-(E/ET)
Taking air into the unit
2
PLFY-M100/125VEM-(E/ET)
Multi-functional ca Standard filter
Multi-functional ca High efficiency filter
Taking air into the unit
Multi-functional ca Standard filter
Multi-functional ca High efficiency filter
4-4. FRESH AIR INTAKE AMOUNT & STATIC PRESSURE CHARACTERISTICS
Q
0
B
A
C
1
Curve in the
graphs
Duct characteristics
at site
Q
A
E
C
2
Q
Qa
A
D
3
Q…Designed amount of fresh air intake
<m
3
/min>
A…Static pressure loss of fresh air
intake air duct system with airflow
amount Q
<Pa>
B…Forced static pressure at air condi-
tioner inlet with airflow amount Q
<Pa>
C…Static pressure of booster fan with
airflow amount Q
<Pa>
D…Static pressure loss increase amount
of fresh air intake duct system for
airflow amount Q
<Pa>
E…Static pressure of indoor unit with
airflow amount Q
<Pa>
Qa…Estimated amount of fresh air
intake without D
<m3/min>
How to read curves