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PRODUCT DESIGN
Thermostats:
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.
D ISP O SA B LE N O MIN A L 3 0 0 F .M . F AC E V EL O C ITY
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
Cabinet
Width
(in.)
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.
8
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
F U R N AC E I NP U T
4 0M
6 0M
8 0M
10 0M
12 0M
14 0M
SIDE RETURN
Approx.
Nominal
Flow Area
Filter Size
(in.)
(in
All
16 x 25 x 1
400
F IL T ER S IZ E
Upflow Filters
BOTTOM RETURN
Cabinet
Width
Filter Size
2
(in.)
)
17-1/2
14 x 25 x 1
21
16 x 25 x 1
24-1/2
20 x 25 x 1
2
32 0 in
2
48 3 in
2
64 0 in
2
80 0 in
2
73 8 in
2
73 8 in
Approx.
Nominal
Flow Area
2
(in.)
(in
)
350
400
500
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