8
PRODUCT DESIGN
Thermostats:
Filters:
Filters are required with this furnace and must be provided by the installer. The filters used must comply with UL900 or
CAN/ULCS111 standards. Installing this furnace without filters will void the unit warranty
Upflow Filters
Cabinet
Width
(in.)
Nominal
Filter Size
(in.)
Approx.
Flow Area
(in
2
)
Cabinet
Width
(in.)
Nominal
Filter Size
(in.)
Approx.
Flow Area
(in
2
)
All
16 x 25 x 1
400
17-1/2
14 x 25 x 1
350
21
16 x 25 x 1
400
24-1/2
20 x 25 x 1
500
BOTTOM RETURN
SIDE RETURN
Refer to Minimum Filter Area tables to determine filter area requirement.
NOTE:
Filters can also be installed elsewhere in
the duct system such as a central return.
It is recommended that a single-stage heat, non-power robbing thermostat be used. Refer to the product marketing
literature for a complete list of thermostats offered.
F U R N AC E I NP U T
F IL T E R S IZ E
4 0M
32 0 i n
2
6 0M
48 3 i n
2
8 0M
64 0 i n
2
10 0M
80 0 i n
2
12 0M
73 8 i n
2
14 0M
73 8 i n
2
D ISP O SA B LE N O MIN A L 3 0 0 F .M . F AC E V EL O C IT Y
M IN IM U M F IL T E R S IZ E S f o r D IS P O S AB L E FI L TE R S
