Assessments - 2, GPA: 4
(
)
)
|
Facilidade de uso
Do not place insulation directly against the fireplace or chimney system. FIREPLACE FINISHES Mantels and Trim It is sometimes best to frame your fireplace after it is positioned and the chimney is installed. Frame enclosure for chimney and fireplace with 2 x 4’s (or heavier) lumber. Note:The header may rest on the two (2) metal top spacers on top of the unit but the header must not be notched to fit around the spacers. These fireplaces may sit directly on a combustible surface. A 1"* air space is required between combustible framing and the chimney. A 1" air space is required between combustible framing and fireplace outer wrapper. In Canada, the minimum height for a combustible mantel is 18" (457 mm) above the fireplace opening. Figure 45shows typical Canadian installations. Combustible mantels and trim may be installed 12" above the fireplace opening as per NFPA 211, Section 7-2.3.3. and Figure 46. 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:2" clearance to combustibles required in Canada. Combustible Mantel FireplaceOpening Spacer 8" Max. (203mm) Finished Wall Canadian Installation Header 18" Min. (457mm) Figure 45 NOTE: DIAGRAMS & ILLUSTRATIONS NOT TO SCALE. Combustible Mantel and Trim 12"* Min. 8"* FireplaceOpening Spacer 12" Max. 1 1/2" Finished Wall Header *Both Of These Dimensions Must Be At Least 18” When An Unvented Gas Log Set Rated At 26,000 BTU Or Higher Is Used. (Maximum 40,000 BTU) Typical Installation Figure 46 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 8" beyond both sides of the fireplace opening and 16" beyond the front (seeFigure 47). 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 (refer to Figures 6 & 7). A wall shield is required where a continuous perpendicular side wall is within 12" of the fireplace opening (Figure 48). Use a 36" W x 36" H wall shield constructed of a durable, noncombustible material having an equal or better (lower k value) insulating value than k = .54 BTU IN/FT2 HR °F. At no time may a perpendicular side wall be located closer than 9" from the fireplace opening. If fireplace is installed diagonally across a 90° corner; no wall shields are required. Hearth Extension Dimensions Hearth Extension Dimensions A 16" B 35" C 8" D 51" C C B Note: To convert inches to millimeters A divide by 0.03937 D Figure 47 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 thickness of = alternate material (kM) x alternate k-value (per inch) material (TM) of listed material (kM) TM (inches) = kM x *.84 TM (inches) = *.35 x *.84 .416 (inches) = .416 x Specified min. thickness of listed material (TL) TL 1" 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 rM TM (inches) = *1.19 x 1" *2.86 .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”. Listed Material k (per inch) r (per inch) Listed Min.Thickness Listed Material .84 KL 1.19 rL 1" TL ** Approved Alternate Materials for Floor/Hearth Protection AlternativeMaterials Thermal Values MinimumThickness (rounded to nearest 1/8 inch) k (per inch) KM r (per inch) rM Min. T...
Este manual também é adequado para os modelos :Lareiras - BC-36 (305.34 kb)
Lareiras - BC-36-2 (305.34 kb)
Lareiras - BCI-36 (305.34 kb)
Lareiras - br-36 (305.34 kb)