Osburn OB01801 Manual do Utilizador descarregar pdf (Página 11)

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If a non-combustible material floor protection needs to be added in front and level with the hearth

extension masonry fireplace (see Figure 2.6a), an R factor equal to or greater than 1.00 is required. If the

extension of the masonry hearth is raised at least 4" from the floor protection (see Figure 2.6b), a non-

combustible material without an R factor is sufficient.

Figure 2.6a

Figure 2.6b

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Osburn OB01801 Manual do Utilizador Página 11