34
ST-A1194-18-XO
DETAIL A
DIRECT VENT (cont.)
GENERAL VENTING REQUIREMENTS AND
GUIDELINES
Figure 17 below shows the necessary detail for the roof penetration on a standard direct-vent vertical termination.
*3” (8cm) minimum only if no snow accumulation is anticipated.
Venting
Terminations more than 24”
above roof penetration re-
quire additional support.
*
12” (31cm) U.S.
CANADA: TERMINATIONS
MUST CONFORM TO
CSA B149.1-10, SECT. 8.14
48” MAX.
(122 cm)
45” MAX.
(114 cm)
36” MAX.
(91 cm)
3” MIN.
(8 cm)
NOTE: IF 3 Ø VENTING IS
USED, BOTH PIPES (INTAKE
AND EXHAUST) MUST BE
REDUCED TO 2 Ø BEFORE
PENETRATING ROOF.
FIGURE 17
D
IRECT VENT VERTICAL TERMINATION DETAIL
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