www.desatech.com 116010-01C10VenTing inSTallaTionContinued10 FOOT RULEAll flue gas outlet chimney terminations mustextend a minimum of 3 feet in height above thehighest point where it passes through the roof andmust be at least 2 feet above the highest point ofthe roof that is within a horizontal distance of 10feet (see Figure 17).FINISHING THE FIREPLACECombustible materials, such as wallboard, gypsumboard, sheet rock, drywall, plywood, etc. may makedirect contact with sides and top around the fireplaceface. It is important that combustible materials donot overlap the face itself. Brick, glass, tile or othernoncombustible materials may overlap the frontface provided they do not obstruct essential open-ings like louvered slots or any other opening. Whenoverlapping with a noncombustible facing material,use only noncombustible mortar or adhesive.4" Min.4" Min.18"Min.Typ.Figure 16 - Multiple Chase Installation10'' Min.10'3' Min.' Min. 3' Min.Level ofFlue GasOutletFigure 17 - 10 Foot RuleFigure 18 - Gas Line KnockoutSideFirebrickFinishedSideRefractoryKnockoutPlugOutside ofFireplaceGas LineConduitInsulationGasConduitCover1/2" DowelRemoveKnockoutopTional gaS lineinSTallaTionGas line hook up should be done by your supplieror a qualified service person.Note: Before you proceed, make sure your gassupply is turned off.Use only a 1/2" black iron pipe and appropriatefittings.1. Remove knockout indentation on refractory orfirebrick wall located above the refractory hearthfloor. The knockout indentation must be firmlytapped with any solid object such as a 1/2" doweluntil it is released. Remove fragmented portionsof refractory (see Figure 18).2. Remove gas line cover plate located on eitherside of fireplace and pull out insulation from gasline conduit sleeve. Save insulation for reuse.Replace screws.3. Run a 1/2" black iron gas line into the fireplacethrough the rear at gas line conduit sleeve (ifusing a raised platform, add height). Providesufficient gas line into fireplace chamber forfitting connection (see Figure 19, page 11).Note: Secure incoming gas line to woodframing to provide rigidity for threaded end.4. Repack insulation around gas line and intosleeve opening. Seal any gaps between gas lineand refractory knockout hole with refractory ce-ment or commercial furnace cement, Install thegas appliance or cap off gas line if desired.