Hearth Extension Requirements - HearthStone WFP-75 Owner's Manual

Figure 5. Installation on raised base.

2.4.2 Hearth Extension Requirements

The hearth extension floor area must extend at least 18" (40 cm) in front of the hearth and
at least 8" (20 cm) on each side of the door opening (see figure 7). The joint between the
hearth extension and the fireplace hearth needs to be made of non-combustible material
such as sheet metal (not included) as shown on figure 8.
Hearthstone Quality Home Heating Products, Inc ®
Figure 6. Ceiling clearance requirements
Figure 7
14 WFP-75 Model 8410