Heatilator EL36 Series Owner's Manual page 29

Non-combustible Sealant
After completing the framing and applying the facing mate-
rials over the framing, a bead of non-combustible sealant
must be used to close off any gaps at the top and sides
between the fi replace hearth. This will prevent cold air leaks
and sparks from falling between the fi replace and the hearth
extension.
Non-combustible Sealant
Figure 10 Non-combustible Sealant
Heatilator • EL36/EL42 • 4044-132 Rev P • 02/07 29