Grandaire WFAR080B048 - Page 26

INSTALLATION INSTRUCTIONS Gas Furnace: WFAR
26 440 01 7104 02
Specifications subject to change without notice.
Table8–OpeningDimensions--In.(mm)
FURNACE
CASING
WIDTH
IN. (mm)
APPLICATION
PLENUM OPENING FLOOR OPENING
A B C D
14–3/16{
(360)
Upflow Applications on Combustible or Noncombus-
tible
Flooring (subbase not required)
12--11/16
(322)
21--5/8
(549)
13--5/16
(338)
22--1/4
(565)
Downflow Applications on Noncombustible Flooring
(subbase not required)
12--9/16
(319)
19
(483)
13--3/16
(335)
19--5/8
(498)
Downflow applications on combustible flooring
(subbase required)
11--13/16
(284)
19
(483)
13--7/16
(341)
20--5/8
(600)
Downflow Applications on Combustible Flooring with
Coil
Assembly or coil box (subbase not required)
12--5/16
(319)
19
(483)
13--5/16
(338)
20
(508)
17–1/2
(445)
Upflow Applications on Combustible or Noncombus-
tible
Flooring (subbase not required)
16
(406)
21--5/8
(549)
16--5/8
(422)
22--1/4
(565)
Downflow Applications on Noncombustible Flooring
(subbase not required)
15--7/8
(403)
19
(483)
16--1/2
(419)
19--5/8
(498)
Downflow applications on combustible flooring
(subbase required)
15--1/8
(384)
19
(483)
16--3/4
(425)
20--5/8
(600)
Downflow Applications on Combustible Flooring with
Coil
Assembly or coil box (subbase not required)
15--1/2
(394)
19
(483)
16--1/2
(419)
20
(508)
21
(533)
Upflow Applications on Combustible or Noncombus-
tible
Flooring (subbase not required)
19--1/2
(495)
21--5/8
(549)
20--1/8
(511)
22--1/4
(565)
Downflow Applications on Noncombustible Flooring
(subbase not required)
19--3/8
(492)
19
(483)
20
(508)
19--5/8
(498)
Downflow applications on combustible flooring
(subbase required)
18--5/8
(473)
19
(483)
20--1/4
(514)
20--5/8
(600)
Downflow Applications on Combustible Flooring with
Coil
Assembly or coil box (subbase not required)
19
(483)
19
(483)
20
(508)
20
(508)
24--1/2
(622)
Upflow Applications on Combustible or Noncombus-
tible
Flooring (subbase not required)
23
(584)
21--1/8
(537)
23--5/8
(600)
22--1/4
(565)
Downflow Applications on Noncombustible Flooring
(subbase not required)
22--7/8
(581)
19
(483)
23--1/2
(597)
19--5/8
(498)
Downflow applications on Combustible flooring
(subbase required)
22--1/8
(562)
19
(483)
23--3/4
(603)
20--5/8
(600)
Downflow Applications on Combustible Flooring with
Coil
Assembly or coil box (subbase not required)
22--1/2
(572)
19
(483)
23--1/2
(597)
20
(508)
{ Not all families have these models.
UPFLOW DOWNFLOW HORIZONTAL
YES
NO
NO
YES
YES
YES
NO
120°
MIN
YES
120°
MIN
YES
120°
MIN
90°
90°
PERFORATED
DISCHARGE DUCT
FLANGE
A10493
Figure 22 -- Duct Flanges