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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" tables shown represents blower performance WITH-
OUT 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.
Single side return above 1800 CFM is approved as long as
the filter velocity does not exceed filter manufacturer's rec-
ommendation 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 building
joists, studs or framing.
Johnson Controls Unitary Products
Left
Right
Front
Rear
Side
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
1. Air velocity through throwaway type filters may not exceed 300 feet per min-
ute (91.4 m/min). All velocities over this require the use of high velocity fil-
ters.
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.
Floor/
Flue
Bottom
3
6
Combustible
0
1
Combustible
1
3
6
1
1
0
1
1
3
6
Combustible
0
1
Combustible
363658-CTG-G-0613
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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