Évaluations - 1, GPA: 4
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Facilité d'utilisation
Glass Doors If glass doors are to be installed on these fireplaces, refer to specific installation instructions packed with the glass doors. Use only the doors that are listed for use with these fireplaces. Use of other non-listed glass door on these fireplaces may constitute a potential fire hazard and is not recommended. NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. CAUTION: CERTAIN GLASS DOORS OVERLAP THE BLACK METAL FACING OF THE FIREPLACE. IF THE FIREPLACE HAS BEEN FACED WITH NONCOMBUSTIBLE MATERIALS, THERE MIGHT NOT BE SUFFICIENT CLEARANCE TO INSTALL THE GLASS DOORS OF YOUR CHOICE. ENSURE ADEQUATE CLEARANCE IS MAINTAINED AT ALL TIMES SO AS NOT TO INTERFERE WITH THE INSTALLATION AND OPERATION OF GLASS DOORS. FIREPLACE FINISHES Mantels and Trim In Canada, the minimum height for a combustible mantel is 18" (457 mm) above the fireplace opening. Figure 39 shows typical Canadian installations. For installations other than Canada, combustible mantels and trim may either project in front or be flush with the finished wall as per NFPA 211 section 7-2.3.3. and Figure 40. If a mantel is of a noncombustible material, it is exempt from these requirements as long as it does not interfere with the installation or operation of glass doors. Note:Do not place any combustible materials on the fireplace face. Finished Wall Header 8" Max. (203mm) Noncombustible Wall Covering Fireplace Opening Canadian Installation 18" Min. (457mm) Combustible Mantel Spacer Figure 39 Finished Wall Header Noncombustible Wall Covering Fireplace Opening U.S. Installation 12" Min. Combustible Spacer * 12" Min. Finished Wall Header Noncombustible Wall Covering Fireplace Opening U.S. Installation 12" Min. Combustible Spacer * 12" Min. Hearth Extension Dimensions C C B A D Figure 41 Opening Width 43" A 20" (508 mm) B 43" (1092 mm) C 12" (305 mm) D 62" (1575 mm) Mantel * A 1...” Projection Is Permitted Between The Face Top And Mantle, 8” Minimum Above Door Opening Figure 40 Hearth Extensions and Wall Shields A hearth extension must be installed with all fireplaces. It is to protect the combustible floor in front of the fireplace from both radiant heat and sparks. The hearth extension must extend beyond the front at least 20" (508 mm) and both sides at least 12" (305 mm) (Figure 41 ). Use a hearth extension constructed of a durable noncombustible material having an equal or better (lower k value) insulating value of k = .84 BTU IN/FT2 HR °F or a thermal resistance that equals or exceeds r = 1.19 HR °F FT2/ BTU IN. With these values, determine the minimum thickness/material required using the formula and Page 17. Note:Any noncombustible material whose k value is less than .84 or whose r value is more than 1.19 is acceptable. If the fireplace is installed on a combustible floor, use the metal safety strips (provided) on the floor extending half under the fireplace and half under the hearth extension. A wall shield is required where a continuous perpendicular side wall is within 18" of the fireplace opening (Figure 42). Use a 40" W x 40" H wall shield constructed of a durable, noncombustible material having an equal or better (lower k value) insulating value than k = .84 BTU IN/FT2 HR °F. At no time may a perpendicular side wall be located closer than 12" from the fireplace opening. If fireplace is installed diagonally across a 90° corner; no wall shields are required. Methods of Determining Hearth Extension and Wall Shield Equivalents -To determine the thickness required for the alternate material when either the “k” value or “r” value is known, use either the k formula or r formula. Example: If Micore 160 is to be used for the hearth extension fireplace, how thick must this material be? kM = k value per inch of alternatematerial rM = r value per inch of alternatematerial TM = minimum thickness required for alternatematerial TS = standard thickness of the alternatematerial kL = k value per inch of listedmaterial rL = r value per inch of listedmaterial TL = minimum thickness of listedmaterial Note: An asterix “*” indicates, it is a value taken from Table 1. Using the k formula: Minimum k-value (per Inch) of Specified min. thickness of = alternate material (kM) x thickness alternate k-value (per inch) of listed material (TM) of listed material (kM) material (TL) TM (inches) = kM x TL *.84 TM (inches) = *.35 x 1" *.84 .416 (inches) = .416 x 1" Answer - The minimum required thickness of the Micore 160 is .417”, therefore round up to nearest standard thickness available which is 1/2”. Using the r formula: Minimum r-value (per Inch) Specified min. thickness of = of listed material x thickness alternate r-value (per inch) of listed material of alternate material material TM (inches) = rL x TL r M TM (inches) = *1.19 x 1" *2.86 .416 (inches) = .416 x 1" NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. Answer - The minimum required thickness of the Micore 160 is .417”, therefore round up to nearest standard thickness available which is 1/2”. Answer - The minimum r...