Regency® E18 Gas Fireplace Insert | 3737|installation5 1/4"133mm8 3/16"208mm2 1/8"54mmCFiresong 220N Firebox E18 InsertDETAIL CSCALE 1 : 4Leg height settingDE18 InsertFiresong 220N FireboxVents on center1 15/16"49mmFiresong 220N Installation SpecificationsLeg Setting / Outer Shell PositionFlex Adaptor Length5 - 3/16"[132mm]5 1/4"133mm8 3/16"208mm2 1/8"54mmCDETAIL CSCALE 1 : 4Leg height settingDE18 InsertFiresong 220N FireboxVents on centerDETAIL DSCALE 1 : 4Adaptor PlateFastener Setting1 15/16"49mmLeg Setting / Outer Shell PositionFlex Adaptor LengthCollar Plate Setting / Vent positionE18 Install SpecificationsSee Installtion of E18 into Existing Units for General Installation Guidance.This install of the E18 uses Vent Connection Type A..The Length of 4" Flex needed is 1-15/16" semi-expanded. Secure flue adapter top plate to under side of existing firebox using 4 self tap-ing screws.1. Loosen 2 x philips screws on both right and left legs.2. See above diagram below for required leg setting.3. Install with supplied phillips screws to prepunched holes and tighten previ-ous screws that were loosened in Step 1.4. Keep left side leg loose until outer firebox is in position in ZC box - to allowadjustment of gas line.Firesong 220N faceplate is an outside fit, if the front metal faceof the 220N is covered with stone or tile - a custom faceplatewill be required.The following measurements of the 220N metal face will bevisible if no stone or tile is covering it. If this metal face is vis-ible, the standard Faceplate (616-920) will fit.Set to thisholeSet to thisholeRight side shownSecure top plate to firebox w/4 screws.Secure vent slide plate to flex pipe with 4screws3"(76mm)3"(76mm)1"(25mm)Firesong 220NFront Facing measurementsNote: this measurementis above lower area