Appendix; Specifications; Clearances To Combustible Materials - HearthStone WFP-75 Owner's Manual

5.

APPENDIX

5.1 SPECIFICATIONS

Weight: 385 lbs Height: 37¼" (95 cm) Width: 36" (91 cm) Depth: 24¾" (63 cm)
Maximum recommended heating area: 500 to 2,100 square feet (with forced air kit) Heating
capacity* – BTU/hr., EPA test wood: 30,500
Heating capacity* – BTU/hr., seasoned cordwood: 75,000
Optimum efficiency: 77%
*Why is the BTU indicated on the EPA label smaller than the one advertised?
You will notice a difference between the BTU output as indicated on the unit's white EPA label
affixed to the glass and the BTU as advertised on our web site and/or product literature. The
maximum BTU output we advertise for this unit is what will be obtained with a full load of
seasoned cordwood inserted inside the firebox. The EPA output, on the other hand, is what
has been obtained during emissions testing. The EPA test procedure requires that a special
type of wood be used and positioned inside the firebox in a manner that does not represent
the way the firebox volume would normally be utilized using seasoned cordwood. The EPA
test load is typically much smaller. Hence, the BTU as per the EPA label is reduced. The
BTU output that should be considered by a normal user is the one we advertise for seasoned
cordwood.

5.2 CLEARANCES TO COMBUSTIBLE MATERIALS

The following clearances meet the minimum requirements for a safe installation.
Side wall:
Side mantle:
Wall in front of fireplace:
Ceiling:
Fireplace enclosure:
Combustible shelf :
Hearthstone Quality Home Heating Products, Inc ®
24" (43 cm) measured from the inside door frame.
4" minimum
48"
7 ft. (2.15 m) measured from the base of the fireplace.
Back wall: 0"
Sides: 0"
Floor (under the fireplace): 0"
Non-combustible surround (top): Cement board (Durock) at 18"
Non-combustible surrounds (sides): Cement board (Durock) at 4"
Chimney: 2" (50 mm)
58" (147 cm) measured from the base of the fireplace
for a shelf with a depth of 6" or less.
64" (163 cm) measured from the base of the fireplace
for a shelf with a depth of more than 12" (15 cm).
49 WFP-75 Model 8410