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Rinnai Corporation Hydronic Furnace (37AHB) Manual
6"
17 13/16"
1"
18 5/16"
1"
C
B
34"
A
22"
E
13/8"
D
17 13/16"
21/8"
Table 1 - Physical Data
UNIT SIZE
A B C D E
in. mm in. mm in. mm in. mm in. mm
37AHB04508KA5 14 355.6 18 457.2 12 304.8 10 - 1/2 266.7 19 482.6
37AHB06012KA5 17 -1/2 444.5 18 457.2 16 406.4 16 - 11/16 423.9 19 - 1/4 489.0
37AHB07514KA5 21 533.4 18 457.2 20 508 18 - 11/16 474.7 19 - 1/2 495.3
37AHB09016KA5 24 - 1/2 622.3 18 457.2 24 609.6 21 - 1/8 536.6 19 482.6
DIMENSIONS
Figure 1
Water In
Water Out
7/8” Dia. KO Supply
Power Wire Entry
(Typ. for both sides)
7/8” Dia. KO Thermostat Wire
Entry (Typ. for both sides)