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Destination 1.5 Insert Installation and Operation Manual
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 4" (76 mm) into the room
(C) the calculation would be:
Value D = B - (A - C)
Value D = 16" - (16" - 4")
Value D = 16" - 12"
Value D =
4"
Non-combustible floor protection of at least
4" (102 mm)
in depth must be installed in front of the
fireplace hearth extension.
If the extension of the masonry hearth is raised at least 8" (F) from the floor protection, a non-
combustible material without an R factor extending 16 " (406 mm) (USA)/18’’ (457 mm) (CAN) from
the front of the insert is required.
