Vermont Castings • Merrimack Large Insert Owner’s Manual_R15 • 11/18
7
3-90-30004671
Clearance Requirements
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side clearance from this point. Measure the top trim and/or
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Measure
side trim
clearance
from here
Fireplace Clearances
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** Where side trim extends more than 1
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also the required side wall clearance.
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Figure 4
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Hearth Requirements
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that is in direct contact with concrete poured over earth. These
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through the hearth to the wooden framing. Such hearths are
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in a typical installation.
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the insert. The approved construction of this protection is a
minimum or 24 gauge galvanized sheet metal or equivalent.
Figure 5 shows the details of hearth requirements.
A
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7”
(178 mm)
United States
Canada
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Figure 5
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How to Determine if Alternate Floor Protection
Materials are Acceptable
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specified includes some form of thermal designation
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Procedure:
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inches:
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inches:
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protector:
i. Use the formula in Step 1 to convert values not
expressed as R.
5 [7
1
K x 12
5 [7
1
k
