Desa C36EMW Framing Dimension, Corner Installation, TIE-DOWN Strap, Hearth Extension

STEP 3: Set the fireplace directly in front of this opening and slide the unit back until the nailing flanges touch the side framing.

STEP 4: Check the level of the fireplace and shim with sheet metal if necessary. Make sure the unit is balanced on each side.

Figure 1 FRAMING DIMENSION

Figure 2 CORNER INSTALLATION

Figure 3 TIE-DOWN STRAP

STEP 5: Before securing fireplace to prepared framing, the ember protector (provided), must be placed between the hearth extension (not supplied), and under the bottom front edge of the fireplace to protect against glowing embers falling through. If the fireplace is to be installed on a raised platform,

aZ-type ember protector (not supplied) must be fabricated to fit your required platform height. The ember protector should extend under the fireplace a minimum of 1 - 1/2”. The ember protector should be made of galvanized sheet metal (28-gage minimum).

STEP 6: Secure the fireplace to the floor using tie-down straps (see figure 3) to prevent shifting.

HEARTH EXTENSION

A hearth extension projecting a minimum of 16” in front of and a minimum of 8” beyond each side of the fireplace opening is required to protect combustible floor construction in front of the fireplace. Fabricate a hearth extension using a material which meets the following specifications: a layer of non-combustible, inorganic material having a thermal conductivity of K = 0.84 BTU IN/FT. HR. F (or less) at 1” thick. For example, if the material selected has a K factor of 0.25, such as glass fiber, the following formula would apply:

0.25x 1.0” = 0.30 thickness required

Thermal conductivity “K” of materials can be obtained from the manufacturer or supplier of the non-combustible material. If the hearth extension is to be covered, use non-combustible material such as tile, slate, brick, concrete, metal, glass, marble, stone etc. Provide a means to prevent the hearth extension from shifting and seal gap between the fireplace frame and hearth extension with a non-combustible material (see figure 4).

Figure 4 HEARTH EXTENSION

WARNING: Hearth extension is to be installed only as illustrated.

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