American Standard TCWH-199-AS Installation Start-Up Maintenance Parts page 23

• In vacant chimney applications, install and seal a rain cap over existing chimney openings.
• All piping must be fully supported. Use pipe hangers at a minimum of 4 foot intervals to prevent sagging of
the pipe where condensation may form.
• Do not use the water heater to support any piping.
Figure 5 – Vent Termination Detail
Description
A Clearance above grade, veranda, porch, deck, or balcony
B Clearance to window or door that may be opened
C Clearance to permanently closed window
D Vertical clearance to ventilated soft located above the terminal
with a horizontal distance of 2 feet from the center
E Clearance to unventilated soffit
F Clearance to outside corner
G
Clearance to inside corner
H
Clearance to each side of center line extended above
meter/regulator assembly
I Clearance to service regulator vent outlet
J
Clearance to non-mechanical air supply inlet to building or the
combustion air inlet to any other appliance
K Clearance to a mechanical air supply inlet
L Clearance above paved sidewalk or driveway located
M Clearance under veranda, porch, deck or balcony
Table 8 – Vent Termination Clearances
NOTE: For clearances not specified in ANSI Z223.1/NFPA 54 or CAN/CSA-B 149.1,
please use clearances in accordance with local installation codes and the requirements of the gas
supplier.
line of the terminal.
US
1 foot
1 foot
*
*
*
*
*
* 3 feet with a height 15 feet above
*
1 foot
3 feet above if within 10 feet
horizontally
*
*
Canada
1 foot
3 feet
*
*
*
*
*
meter/regulator assembly
3 feet
3 feet
6 feet
7 feet
1 foot
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