Osburn MATRIX User Manual

Matrix Insert Installation and Operation Manual
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If the extension of the masonry hearth is raised at least 4" from the floor protection
, a non-
combustible material with an R factor of 1.00 is required.
If non-combustible material floor protection needs to be added in front of and level with the
hearth extension of the masonry fireplace, an R factor equal to or greater than 1.24 is required.
The use of an R value is convenient when more than one material is going to be used in the hearth
extension to cover the combustible surface. This is because R values are additive, whereas K values
are not.
There are two ways to calculate the R factor of the floor protection. First, by adding the R-values of
materials used, or by the conversion if the K factor and thickness of the floor protection are given.
To calculate the total R factor from R factors of the materials used, simply add the R-values of
materials. If the result is equal to or greater than the R-value requirements, the combination is

Osburn MATRIX Specifications

General

Brand	Osburn
Model	MATRIX
Category	Indoor Fireplace
Language	English