Hearth and Home Technologies EL42 Series Finishing, Hearth Extension, = 1/k x inches of thickness

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11 Finishing

A. Non-Combustible Materials

•Materials which will not ignite and burn, composed of any combination of the following:

-	Steel	-	Iron
-	Brick	-	Tile
-	Concrete	-	Slate
-	Glass	-	Plasters

•Materials reported as passing ASTM E 136, Standard

Test Method for Behavior of Metals, in a Vertical Tube Furnace at 750° C

B. Combustible Materials

•Materials made of or surfaced with any of the following materials:

-	Wood	-	Compressed paper
-	Plant ﬁbers	-	Plastic

•Any material that can ignite and burn; ﬂame proofed or not, plastered or un-plastered

C. Hearth Extension

WARNING! Risk of ﬁre! High temperatures, sparks, embers or other burning material falling from the ﬁreplace may ignite ﬂooring or concealed combustible surfaces.

•Protective metal hearth strips MUST be installed.

•Hearth extensions MUST be installed exactly as speciﬁed.

•You MUST use a hearth extension with this ﬁreplace.

•Refer to Figure 11.1 for minimum dimensions.

•This ﬁreplace has been tested and approved for use with a hearth extension insulated to a minimum R value of 1.03.

•The hearth extension material MUST be covered with tile, stone or other non-combustible material.

•Manufactured hearth materials will usually have a published R value (resistance to heat) or k value (conductivity of heat). Refer to the formula in Table 11.1 to convert a k value to an R value,

Table 11.1

R = 1/k x inches of thickness

Table 11.2

•Refer to Table 11.2 for hearth extension insulation alternatives.

Hearth Extension Insulation Alternatives-Total minimum R Value must equal 1.03

			Minimum
	k per inch	r per inch	thickness
Material	thick	thick	required
Hearth & Home HX3, HX4 (Micore 300™)	0.49	2.06	1/2 in.
USG Micore 160™	0.39	2.54	1/2 in.

USG Durock™ Cement Board	1.92	0.52	2 in.
Cement Mortor	5.0	0.20	5-1/8 in.

Common Brick	5.0	0.20	5-1/8 in.
Ceramic Tile	12.50	0.08	12-1/4 in.
Armstrong™ Privacy Guard Plus	0.46	2.18	1/2 in.

Marble	14.3-20.0	0.07-0.05	14-5/8 in. - 20-3/8 in.

38	Heatilator • EL36/EL42 • 4044-132 • Rev V • 11/08

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Contents Hot screen/mesh and glass doors will cause burns Wood Burning FireplaceOperation Fire RiskNumber Listing Label Information/LocationGrate User Guide Table of ContentsInstaller Guide Warranty Hearth & Home Technologies Limited Warranty CONDITIONS, Exclusions & Limitation of LiabilityHeatilator EL36/EL42 4044-132 Rev V 11/08 Non-Combustible Materials Listing and Code ApprovalsAppliance Certiﬁcation Combustible MaterialsHot glass will cause burns Operating InstructionsYour Fireplace Grate Seasoned WoodStarting a Fire FirescreenOptional Components Glass DoorsVented Gas Log Sets & Gas Log Lighters Clear SpaceWood Fuel Disposal of Ashes Maintainance and ServiceChimney Inspection/Cleaning Creosote Formation and Need for RemovalInspect Grate Glass CleaningCheck Firebox Refractory Frequency As desiredTroubleshooting Guide Start Fire Problems Possible Cause SolutionInstaller Guide Getting StartedNegative Pressure Design and Installation ConsiderationsDraft Locating Fireplace & Chimney Frequently open doors Central heat outlets or returnsInspect Fireplace and Components Tools and Supplies NeededFireplace System Requirements Select Fireplace Location Mm all configurationsFraming & Clearances Clearances Clearances to Combustible MaterialsFrame the Fireplace Fireplace Outside Model # Opening DimensionsSidewalls/Surrounds Position the Fireplace Installation of FireplaceThings to Consider Place Protective Metal Hearth StripsFt min. from top of uppermost chimney section to air inlet YESInstall Outside Air Kit Outside Air InstallationChimney Assembly Maintain minimum height of chimney above roofChimney Requirements Height of Chimney ComponentsUsing Offsets/Returns ExampleInstall Chimney Air Kit Assemble Chimney SectionsInstall Ceiling Firestops Installing the Ceiling FirestopInstall Attic Insulation Shield Prepare Attic Insulation ShieldFollowing steps should be skipped if using a chase Complete InstallationInstall Flashing Cut out Hole in RoofChimney Termination Requirements Flat RoofsGas line holes and other openings should be caulked with Chase InstallationsConstruct the Chase Chase should be constructed in the manner of allInstall as per Sections 7 Install Fireplace & ChimneyInstall Chase Top Install Termination Cap ST375 Square Termination CapTS345/TS345P Square Termination Cap TCT375 Terra Cotta CapField Constructed Shrouds ShroudsRadiation Shield Open Top Shroud TR342 caps require radiation shieldMailbox Style Shroud radiation shield required Roofed Style Shroud radiation shield required= 1/k x inches of thickness FinishingHearth Extension Refer to .2 for hearth extension insulation alternativesRaised Hearth Extension Framing Minimum betweenNon-combustible Sealant Noncombustible Finishing MaterialsFinishing Material In. Micore or equivilent insulationCombustible Mantel Clearances to Mantels or other Combustibles above FireplaceOutside Di- mensions ModelWood Burning Inserts AccessoriesGas Log/Lighter Provision Gas Code, Ansi Z223.1Fireplace Dimensions Reference MaterialsID4 Insulated Duct Mm i.d 1067 mm UD4 Uninsulated Duct 1321 mm 406 mm1676 mm 508 mm 13 mm Air Kit PartsChimney Components Catalog #305 mm 27-3/8 24-5/8 695 mm 625 mm Effective Outside Height Diameter 10-1/2 121 mm 267 mm10-1/2 267 mm 305 mm 24-5/8 625 mm 787 mm10-7/8 276 mm Rev V 11/08 Service PartsHeatilator EL36/EL42 EL42 Contact Information