Heart & Home Collectables MHC36, MHR36 manual Field Constructed Hearth Extension

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MHC36 AND MHR36 INSTALLATION INSTRUCTIONS

14.Hearth Extension

A hearth extension must be installed with all fireplaces to protect the combustible floor in front of the fireplace from both radiant heat and sparks.

The construction of, and materials used for a hearth extension are shown in Figures 19 and 20. A hearth extension of this construction may be covered with any noncombustible decorative material and may have a maximum thickness as per the illustration. Seal gaps between the hearth extension and the front of the fireplace with a bead of noncombustible sealant.

Figure 19 - Factory Built Hearth Extension

Field constructed hearth extensions should be constructed in accordance with the instructions in Figure 20. The field constructed hearth extension must be constructed from 1/2 in. MICORE CV230, or a material with an equivalent insulation value.

Figure 20 - Field Constructed Hearth Extension

WARNING!

Hearth extensions are to be installed only as illustrated to prevent high temperatures from occurring on concealed combustible materials. Hearth sealing strips prevent burning or hot particles from inad- vertently falling directly on combustible surfaces in the event the building should settle and disturb the original construction.

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31072 Rev G

08/04

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Contents Installation & Operating Instructions Table of Contents Design and Installation Considerations Listings and Code Approvals Description of the Fireplace SystemHeatilator fireplace system consists of the following Optional Components IncludeSystem Components Fireplace ComponentsChimney Components AS8AS8 PRE-INSTALLATION Preparation Fireplace Locations and Space RequirementsMHC36 and MHR36 Installation Instructions Frame the Fireplace Framing the FireplaceChimney Requirements Sidewalls/SurroundsUsing Offsets and Returns Offset ChartChimney Height Requirements above roof line Number of Sections RequiredFireplace Installation Position the FireplacePlace the Protective Metal Hearth Strips Level the FireplaceInstall the Firestop Spacers Assemble Chimney SectionsSecure the Chimney System Double-check the Chimney AssemblyAttic Insulation Shield MH842 Ceiling/Roof Thimble See Figures 14Install the Outside Air Kit Termination CapComplete the Enclosure Gas Log/Lighter ProvisionsHearth Extension Field Constructed Hearth ExtensionPosition the Hearth Extension Finishing MaterialMantel Glass DoorsFlue Damper Operating InstructionsGeneral Information Outside Air Wood Fuel GrateFirescreen Draft Problems Starting a FireFlue Draft Maintenance Instructions Chimney CleaningDisposal of Ashes Creosote and SootIndex Limited Warranty Replacement Parts AdvantageHow to Obtain Service Heatilator Woodburning Fireplace