Filter Performance - Pressure Drop Inches W.c. And (Kpa) - York AFFINITY PV9A12N040UP11 Technical Manual

FILTER PERFORMANCE
The airflow capacity data published in the "Blower Perfor-
mance" table listed above represents blower performance
WITHOUT filters. To determine the approximate blower per-
formance of the system, apply the filter drop value for the fil-
ter being used or select an appropriate value from the "Filter
Performance" table shown below.

FILTER PERFORMANCE - PRESSURE DROP INCHES W.C. AND (KPA)

Minimum Opening Size
Airflow Range
1 Opening
Sq. in.
0 - 750 230
751 - 1000 330
1001 - 1250 330
1251 - 1500 330
1501 - 1750 380
1751 - 2000 380
2001 & Above 463
* Washable Fiber Filters are the type supplied with furnace.
APPLYING FILTER PRESSURE DROP TO
DETERMINE SYSTEM AIRFLOW
To determine the approximate airflow of the unit with a filter in
place, follow the steps below:
1. Select the filter type.
2. Select the number of return air openings or calculate the
return opening size in square inches to determine the
proper filter pressure drop.
3. Determine the External System Static Pressure (ESP)
without the filter.
Unitary Products Group
Disposable
2 Openings 1 Opening
Sq. in. In w.c.
0.01
0.04
0.08
0.08
658 0.14
658 0.17
658 0.17
NOTE: The filter pressure drop values in the "Filter Perfor-
mance" table shown below are typical values for the type of
filter listed and should only be used as a guideline. Actual
pressure drop ratings for each filter type vary between filter
manufacturer.
Filter Type
Washable Fiber*
2 Opening 1 Opening
In w.c. In w.c.
0.01
0.03
0.07
0.07
0.08 0.13
0.09 0.15
0.09 0.15
4. Select a filter pressure drop from the table based upon
the number of return air openings or return air opening
size and add to the ESP from Step 3 to determine the
total system static.
5. If total system static matches a ESP value in the airflow
table (i.e. 0.20, 0.60, etc,) the system airflow corre-
sponds to the intersection of the ESP column and Model/
Blower Speed row.
036-21584-001 Rev. C (0205)
Pleated
2 Opening 1 Opening
In w.c. In w.c.
0.15
0.20
0.20
0.25
0.06 0.30
0.07 0.30
0.07 0.30
2 Opening
In w.c.
0.17
0.17
0.17
5