GN National Electric CP - Manual (Page 21)

22618-4-1106 Page 21
VENT EXAMPLES FOR SINGLE FLUE (cont.)
90° ELBOW
EXTERIOR GRADE
FLUE CENTER
6”
(15.2cm)
MIN.
12” (30.5cm) MIN.
1/4” DOWNWARD SLOPE
PER FOOT TO OUTSIDE
Figure 20
Minimum Exterior Grade Dimension - Single Flue, Horizontal Venting Below Floor
42”
(1.2m)
SURROUND
Figure 21
Flex Vent Tubing
Must have minimum 3ft vertical upward