A.O. Smith 305 Specification Sheet
A . O . S M I T H ’ S
I N N O V AT I O N O N D E M A N D
A. O. Smith’s complete line of tankless gas water heaters
A Variety of Sleek, Compact Indoor Models To Choose From
All Models Available
In Both Natural Gas
And Propane Designs
305 and 505
705
Dimension
Description
inches (mm)
inches (mm)
A
Width
14 (355.6)
18.5 (470)
B
Depth
9.6 (244.5)
9.3 (230.5)
C
Height - Unit
22.9 (582)
23.6 (600)
D
Height - with brackets
25.5 (648.2)
25.2 (640)
E
Hot Water Outlet - from wall*
3.6 (91)
4.5 (115)
F
Hot Water Outlet - from center
4.3 (110)
2.4 (61)
G
Cold Water Inlet - from wall*
2.8 (70)
3.9 (99)
H
Cold Water Inlet - from center
1.1 (27)
2.0 (52)
I
Gas Connection - from wall*
4.3 (109)
2.4 (61.2)
J
Gas Connection - from center
3.5 (89)
4.3 (110)
From base to gas connection
1.6 (40)
1.6 (40)
K
From base to cold connection
2.0 (50)
2.0 (50)
From base to hot connection
1.6 (41)
1.6 (41)
* This is the minimum dimension from the wall. The wall bracket is adjustable to allow an additional
1.57 inches (40mm).
Model Dimensions
ATI-305-N (Natural Gas), ATI-305-P (Propane)
ATI-505-N (Natural Gas), ATI-505-P (Propane)
305 and 505 Models
ATI-705-N (Natural Gas), ATI-705-P (Propane)
ATI-705A-N (Natural Gas), ATI-705A-P (Propane) Commercial
705 Model