Advertisement
246815-YTG-D-0108
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.
NOTE: The filter pressure drop values in the "Filter Perfor-
mance" table shown are typical values for the type of filter
listed and should only be used as a guideline. Actual pres-
sure drop ratings for each filter type vary between filter manu-
facturer.
FILTER PERFORMANCE - PRESSURE DROP INCHES W.C. AND (KPA)
Airflow Range
CFM
0 - 750
751 - 1000
1001 - 1250
1251 - 1500
1501 - 1750
1751 - 2000
2001 & Above
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.
Determine the External System Static Pressure (ESP)
without the filter.
UNIT CLEARANCES TO COMBUSTIBLES
Top
Application
In.
Downflow
1
Horizontal
0
*
Combustible floor base or air conditioning coil required for use on combustible floor.
† Line contact only permitted between lines formed by the intersection of the rear panel and side panel (top in horizontal position) of the furnace jacket and build-
ing joists, studs or framing.
4
Minimum
Opening Size
Disposable
2
In W.C.
in
230
330
330
330
380
380
463
Front
Rear
Left Side Right Side
In.
In.
In.
3
0
0
3
0
1
FILTER SIZES
CFM
1200
1600
2000
2000
NOTE: All filters must be high velocity cleanable type.
Filter Type
Washable Fiber
In W.C.
0.01
0.01
0.05
0.05
0.10
0.10
0.10
0.10
0.15
0.14
0.19
0.18
0.19
0.18
3.
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 2 to determine the
total system static.
If total system static matches a ESP value in the airflow table
(i.e. 0.20, 0.60, etc,) the system airflow corresponds to the
intersection of the ESP column and Model/Blower Speed row
Flue
Floor/Bottom
In.
In.
0
0
1
0
Cabinet
Top Return
Size
Filter in
B
(2) 14 x 20
C
(2) 14 x 20
C
(2) 14 x 20
D
(2) 14 x 20
Pleated
In W.C.
0.15
0.20
0.20
0.25
0.30
0.30
0.30
Closet
Alcove
In.
*
Yes
Yes
1
0
Yes
Yes
Unitary Products Group
.
Line
Attic
Contact
Yes
NA
†
Yes
Yes
Advertisement
