STA-RITE SR200NA Service Manual page 18

SECTION TWO – Heater Installation
Heater Venting – Negative Pressure
Table 2-F: Vent Termination Height
vs. Roof Pitch - U.S.
Roof Pitch
Flat to 6/12
6/12 to 7/12
>7/12 to 8/12
>8/12 to 9/12
>9/12 to 10/12
>10/12 to 11/12
>11/12 to 12/12
>12/12 to 14/12
>14/12 to 16/12
>16/12 to 18/12
>18/12 to 20/12
>20/12 to 21/12
* Vent must be at least eight (8) feet away from nearest verti-
cal surface. Vents extending five (5) feet or more above the
roof must be braced or guyed. Consult your local code officials
for detailed information.
Min. 8 Ft.
See Table 4
For Min. Hght.
6" Minimum
Clearance to
Combustible
Materials
Class B Double Wall
Metal Vent Pipe
Metal Flue
Collar
Vent
Body
FIGURE 2-7: Typical Metal Vent Pipe Installation
(Vertical – Negative Pressure) - U.S. Standards
If corrosion is a problem in your area, consider
installing a condensate drain with a trap.
Minimum Height
Above Roof*
1 Ft.
1 Ft. 3 in.
1 Ft. 6 in.
2 Ft.
2 Ft. 6 in.
3 Ft. 4 in.
4 Ft.
5 Ft.
6 Ft.
7 Ft.
7 Ft. 6 in.
8 Ft.
Listed
Termination
Cap
Storm Collar
Flashing
Firestop
Support Vertical
Vent Pipe so
adapter does not
take weight of
pipe.
2-9
Min. 2 Ft.
Min. 10 Ft. (3.3 M)
(.7 M)
6" (15 cm) Minimum
Clearance to Combustible
Materials
Type B Double Wall
Metal Vent Pipe
Vent
Body
Condensate
Drain w/trap
2731 1296 CAN
FIGURE 2-8: Typical Metal Vent Pipe Installation
(Vertical – Negative Pressure) - Canadian Standards
Listed
Termination
Cap
Storm Collar
Flashing
Firestop
Metal Flue
Type B Double Wall
Collar
Metal Vent Tee
Support Vertical
Vent Pipe so
adapter does not
take weight of
pipe. Dispose
of condensate
according to
local codes.