www.desatech.com 116010-01E10VenTing insTallaTionContinued10 FOOT RULEAll flue gas outlet chimney terminations mustextend a minimum of 3 feet in height above thehighest point where it passes through the roofand must be at least 2 feet above the high-est point of the roof that is within a horizontaldistance of 10 feet (see Figure 17).FINISHING FIREPLACECombustible materials, such as wallboard,gypsum board, sheet rock, drywall, plywood,etc. may make direct contact with sides andtop around fireplace face. It is important thatcombustible materials do not overlap the faceitself. Brick, glass, tile or other noncombustiblematerials may overlap front face provided theydo not obstruct essential openings like louveredslots or any other opening. When overlappingwith a noncombustible facing material, use onlynoncombustible mortar or adhesive.24" Min.24" Min.18"Min.Typ.Figure 16 - Multiple Chase Installation10'2' Min.10'3' Min.2' Min. 3' Min.Level ofFlue GasOutletFigure 17 - 10 Foot RuleFigure 18 - Gas Line KnockoutSideFirebrickFinishedSideRefractoryKnockoutPlugOutside ofFireplaceGas LineConduitInsulationGasConduitCover1/2" DowelRemoveKnockoutopTional gas line insTallaTionCAUTION: Do not seal open-ings on the rooftop flashing. Fol-low the installation instructionsprovided with the terminationbeing used.CHASE INSTALLATIONSInstructions for chase installations are includ-ed with chase style termination chosen. In amultiple chase installation, be sure to provideadequate distance between terminations toprevent smoke spillage from one terminationto another. We suggest that terminations beseparated at least 24" center to center andstacked at a vertical height difference of 18"(see Figure 16).Note: If a decorative shroud is to be installed,contact the manufacturer for specifications.Gas line hook up should be done by yoursupplier or a qualified service person.Note: Before you proceed, make sure yourgas supply is turned off.Use only a 1/2" black iron pipe and appropri-ate fittings.1. Remove knockout indentation on refractoryor firebrick wall located above refractoryhearth floor. The knockout indentation mustbe firmly tapped with any solid object suchas a 1/2" dowel until it is released. Removefragmented portions of refractory (see Fig-ure 18).