Positioning The Unit - Century CW2900 Insert Installation And Operation Manual

Us environmental protection agency phase ii certified wood insert
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CW2900 Installation and Operation Manual

8.4 Positioning the Unit

It is necessary to have a floor protection made of non-combustible materials that meets the
measurements specified in the FLOOR PROTECTION table in Section 8.5. To determine
the need to add floor protection (D) beyond the hearth extension, you must do the
following calculation using the data in the Data for floor protection calculation table of
this section: D = B - (A - C). If the value (D) is negative or zero, you do not have to add
more floor protection in front of the unit, because the masonry fireplace hearth extension is
large enough. If the value (D) is positive, you will need floor protection in front of the hearth
extension at least equivalent to the result (D).
Here is a sample calculation to determine the need to add a non-combustible materials
floor protection. For someone living in the USA whose insert would protrude 3" (76 mm)
into the room (C) the calculation would be:
Value D = B - (A - C)
Value D = 16" - (16" - 3")
Value D = 16" - 13"
Value D = 3"
Non-combustible floor protection of at least 3" (76 mm) in depth must be installed in front
of the fireplace hearth extension.
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