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Heatilator • WHB/WTB Refractory • 4055-186 Rev C • 03/08
4
12. Convert Refractory Kit to Fit B-Vent Appliance
a. Locate the back refractory piece and lay the brick side down
on a fl at surface. Locate the indicator marks on the back
of the refractory piece. Lay a straight edge on the indicator
marks and cut with a utility knife. See Figure 8.
Figure 8
(back of Herringbone refractory)
(bottom for b-vent)
Figure 9
(back of Traditional refractory)
(bottom for b-vent)
Figure 10
b. B-Vent/Herringbone - cut at line, discard lower (smaller)
portion. Install cut side down. Refer to Figure 9.
c. Direct Vent/Herringbone - Install whole refractory.
d. B-Vent/Traditional - cut at line, discard upper (smaller)
portion. Install cut side down. Refer to Figure 10.
e. Direct Vent/Traditional - Install whole refractory.