Mitsubishi Electric MFZ-KA-VA Technical Data Book page 78

3. Fresh air intake volume & static pressure characteristics
8-5-2. BRANCH DUCT (Installation at site)
To be compatible with both round and rectangular branch ducts, knockout holes are designed to fit to both shapes for flexible
on-site installation.
How to read the chart
Field duct
characteristics
1
Line of chart
0
Q
2
Q
3
Q
Qa
78
Q...Designed fresh air intake volume
<m 3 /min>
A...Static pressure loss [Pa] of fresh
air intake duct at airflow rate of Q
B...Required boost pressure [Pa] of
air conditioner inlet at airflow rate
of Q
C...Required static pressure [Pa] of
booster fan at airflow rate of Q
D...Required compensation [Pa] for
static pressure loss of fresh air
intake duct to make airflow rate Q
E...Static pressure [Pa] of indoor unit
at airflow rate of Q
Qa...Estimated fresh air intake
[m /min] without compensation of D
3