Quadra-Fire 5100I-GD-B Owner's Manual

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Quadra-Fire 5100I-GD-B Owner's Manual Manual pdf 10 page image

5100-I ACT WOOD INSERTPage 10 September 1, 2008R438-0380DThermal protection must be 1/2 inch (13mm) minimumthickness (“k” value = 0.8) or equivalent material.All floor protection must be non-combustible (i.e., metals,brick, stone, mineral fiber boards, etc.). Any organic materi-als (i.e., plastics, wood paper products, etc.) are combustibleand must not be used. The floor protection specified includessome form of thermal designation such as R-value (thermalresistance) or k-factor (thermal conductivity).A. Floor Protection USA & Canada4 Installation ConsiderationsC. Hearth ExtensionIf the hearth extension is lower than the fireplace opening,the portion of the insert extending onto the hearth must besupported. Manufacturer designed adjustable support kitcan be ordered from your dealer. (See page 22).B. Calculating Alternate Floor Protection MaterialThermal Conductivity: k valueThe k value indicates the amount of heat (in BTU’s) that will flowin 1 hour through 1 square foot of a uniform material 1 inch thickfor each degree (F) of temperature difference from one side ofthe material to the other. The LOWER the k factor means lessheat is being conducted through the non-combustible material tothe combustible material beneath it. The k value of a materialmust be equal or smaller then the required k value to be accept-able.(BTU) (inch)(foot2 (hour) ( oF)Thermal Resistance: R valueThe R value is a measure of a material’s resisteance to heattransfer. R value is convenient when more than one material isused since you can add the R values together, whereas you cannot do this for k value. The HIGHER the R factor means lessheat is being conducted through the non-combustible material tothe combustible material beneath it. The R value of a materialmust be equal or larger then the required R value to be accept-able.Converting k to R:Divide 1 by k and multiply the results times the thickness in inch-es of the material.R = 1/k x inches of thicknessConverting R to k:Divide the inches of thickness by R.k = inches of thickness/RCalculatons:Example: Floor protection requires k value of 0.8 and / inchthick.Alternative material has a k value of 0.6 and is / inch thick.Divide 0.6 by .5 = k value of 0.80. This k value is smaller than0.84 and therefore is acceptable.Table 4.1Materialk perinchthickR perinchthickMinimumthicknessrequiredHearth & Home HX, HX 0.43 2.33 1/2 in.USG Micore 00™ 0.46 2.18 1/2 in.USG Durock™ Cement Board 1.92 0.52 2-1/4 in.Cement Mortar 5.0 0.20 5-7/8 in.Common Brick 5.0 0.20 5-7/8 in.Ceramic Tile 12.50 0.08 14-5/8 in.Marble 14.3-20.00.07-0.0516-5/8 in.- 23-3/8 in.Hearth Extension Insulation Alternatives, R Value = 1.16