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HORIZONTAL SIDEWALL VENTING
For applications where vertical venting is not possible, the
only approved method of horizontal venting is the use of an
auxiliary power vent. Auxilary power venters must be
approved by CSA, UL, or other recognized safety agencies.
Follow all application and installation details provided by the
manufacturer of the power vent.
FILTER PERFORMANCE
The airflow capacity data published in the "Blower Perfor-
mance" table listed above represents blower performance
WITHOUT filters.
All applications of these furnaces require the use of field
installed air filters. All filter media and mounting hardware or
provisions must be field installed external to the furnace cabi-
net. DO NOT attempt to install any filters inside the furnace.
NOTE: Single side return above 1800 CFM is approved as
long as the filter velocity does not exceed filter manufac-
turer's recommendation and a transition is used to allow use
on a 20x25 filter.
Unit Clearances to Combustibles (All dimensions in inches, and all surfaces identified with the unit in an upflow
configuration)
Application
Top
Upflow
1
Upflow B-Vent
1
Downflow
1
Downflow B-Vent
1
Horizontal
1
Horizontal B-Vent
1
1. Special floor base or air conditioning coil required for use on combustible floor.
2. 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.
Johnson Controls Unitary Products
Left
Front
Rear
Side
6
0
0
3
0
0
6
0
0
3
0
0
6
0
0
3
0
0
Recommended Filter Sizes
CFM
800
1000
1200
1200
1600
1600
2000
2200
2000
NOTES:
1. Air velocity through throwaway type filters may not exceed 300
feet per minute (91.4 m/min). All velocities over this require the
use of high velocity filters.
2. Do not exceed 1800 CFM using a single side return and a 16x25
filter. For CFM greater than 1800, you may use two side returns or
one side and the bottom or one return with a transition to allow
use of a 20x25 filter.
Right
Floor/
Flue
Side
Bottom
3
6
Combustible
0
1
Combustible
1
3
6
1
1
0
1
1
3
6
Combustible
0
1
Combustible
363658-CTG-C-0708
Cabinet
Side
Size
(in)
A
16 x 25
A
16 x 25
A
16 x 25
B
16 x 25
B
16 x 25
C
16 x 25
C
(2) 16 x 25
C
(2) 16 x 25
D
(2) 16 x 25
Closet
Alcove
Attic
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
Yes
Yes
No
Yes
Yes
Bottom
(in)
14 x 25
14 x 25
14 x 25
16 x 25
16 x 25
20 x 25
20 x 25
20 x 25
22 x 25
Line
Contact
No
No
No
No
2
Yes
2
Yes
3
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