16
Venting (Part I) continued-
THROUGH THE ROOF VENTING: (VERTICAL VENTING)
Cut t he necessary holes t hrough t he roof and ceiling and inst all t he vent
connect or as show n in Figure 4. Make sure t hat t he inst allat ion meet s t he
local codes and/or The Nat ional Fuel Gas Code ANSI Z223.1 (Lat est
Edit ion) or CGA/CAN B149 Inst allat ion Code (lat est edit ion).
Figure 4
NOTE: For installations requiring both horizontal and vertical runs, the
following rule must be followed: Total length of straight pipe (both
horizontally and vertically) must not exceed the allowable length listed in
the ‘‘Through The Wall’’ section of the table for total number of elbows
used.
