Drolet ECO-65 - Manual (Page 14)

c) VERTICALLY INTO EXISTING CHIMNEY SYSTEM
(Refer to Figure 14)
As an alternative, 4” Vent can be run inside existing chimney to termination (Figure 12). This is the preferred
method.
Follow guidelines for equivalent vent length.
FIGURE 14
Venting through
existing chimney
FIGURE 13
Venting through roof