Hearth and Home Technologies HST-42D owner manual Finishing Material, Noncombustible Facing

D. Finishing Material

Refer to Sections 11.A. and Sections 11.B. for combus- tible/noncombustible materials. Refer to Figure 11.9 for noncombustible zone.

WARNING! Risk of Fire! You must maintain clearances.

•Use only non-combustible framing material below standoffs.

•Sheetrock, wood or other combustibles must NOT be used as sheathing or facing in the noncombustible zone.

•DO NOT cover metal fireplace front with combustible materials.

•Install combustible materials only to specified clearances on top front and side edges.

•Complete framing and apply facing material (drywall) over framing.

•A bead of 300-deg F minimum non-combustible sealant must be used to close off any gaps at the top and sides between the fireplace and facing to prevent cold air leaks.

•Large gaps can be bridged with fiberglass rope gasket.

•Only non-combustible materials may be used to cover the metal fireplace front.

These surfaces may be covered with noncombus- tible material.

High temperature sealant.

Figure 11.2 Noncombustible Facing

Finished combustible wall

Combustible material

Non-combustible decorative facing (up to full brick depth)

High temperature (300°F min.) continuous, non-combustible sealant

Tile, stone or other non-combustible material

Flat 2 x 4 stud wall

2 x 4 header, flush with front of stand-offs

Floor constructed of wood or other combustible material

HX3 Hearth Extension or equivilent insulation

Figure 11.3 Decorative Facing

Metal strips are placed 2 in. (51 mm) under the front of the fireplace and must extend beyond the front and sides of fireplace opening by 2 in. (51 mm)

Heat & Glo • HST-42D • 27177 • Rev AB • 11/08 39