{"product_id":"hearthstone-stoves-green-mountain-80-freestanding-wood-stove","title":"Hearthstone Stoves Green Mountain 80 Freestanding Wood Stove","description":"\u003ch2\u003eCast Iron TruHybrid™ Wood Stove with a Soapstone-Lined Firebox and a 6-Inch Top- or Rear-Exit Flue\u003c\/h2\u003e\n\u003cp\u003eEuropean cast iron construction with a soapstone-lined 3.15 cubic foot firebox, TruHybrid™ catalytic combustion, a versatile 6-inch flue, and a published HeatLife™ of up to 30 hours.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eTruHybrid™ combustion system combining primary and secondary combustion with catalytic tertiary combustion\u003c\/li\u003e\n\u003cli\u003eEPA certified at 0.53 g\/hr particulate emissions under the 2020 EPA particulate standard, tested with crib wood\u003c\/li\u003e\n\u003cli\u003e80% HHV weighted-average efficiency, measured across four burn-rate categories using EPA Method 28R and CSA B415-10 methodology\u003c\/li\u003e\n\u003cli\u003ePublished HeatLife™ of up to 30 hours\u003c\/li\u003e\n\u003cli\u003e3.15 cubic foot soapstone-lined firebox accepts logs up to 23\" in length\u003c\/li\u003e\n\u003cli\u003eHeats up to a maximum of 2,500 square feet, depending on insulation, floor plan, stove placement, and fuel quality\u003c\/li\u003e\n\u003cli\u003e6\" flue collar with top or rear exit\u003c\/li\u003e\n\u003cli\u003eNew-generation Green Mountain styling with an elegant silhouette, linear cast iron texture, and a flush door supported by hidden hinges\u003c\/li\u003e\n\u003cli\u003eLarge glass window designed to show as much of the fire as possible\u003c\/li\u003e\n\u003cli\u003eApproved for U.S. mobile home installation when installed to the manufacturer's requirements\u003c\/li\u003e\n\u003cli\u003eCurrent finish: Black Matte\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\u003ch4\u003eTruHybrid™ Combustion Technology\u003c\/h4\u003e\n\u003cp\u003eThe TruHybrid™ system burns the fuel, then the gases the wood releases, then routes the remaining exhaust through the catalysts for tertiary combustion. A bypass handle directs combustion products around the catalysts during startup and reloading, and through the catalysts once the catalyst thermometer shows the stove is in its active range. The Green Mountain 80 Model 8681 uses Applied Ceramics ACI-6M2 catalytic combustors, three required, which require periodic inspection and eventual replacement. The catalysts become active around 500°F, and the stove typically operates in the 800°F to 1300°F catalyst temperature range. HearthStone notes that there should be little to no visible smoke from the chimney when the catalysts are in the active zone and fully functional.\u003c\/p\u003e\n\u003ch4\u003eCast Iron and Soapstone-Lined Firebox\u003c\/h4\u003e\n\u003cp\u003eThe Green Mountain 80 is built from European cast iron produced at HearthStone's own foundry in Spain, with a soapstone-lined firebox. Soapstone absorbs the heat of the fire and releases it gradually, warming objects in the room rather than only the air. HearthStone notes that soapstone requires gradual break-in fires so the natural moisture in the freshly quarried stone is driven out slowly, and that stone color may change and small surface fractures may appear with use without affecting stove function.\u003c\/p\u003e\n\u003ch4\u003eNew-Generation Green Mountain Styling\u003c\/h4\u003e\n\u003cp\u003eThe Model 8681 carries the new generation of Green Mountain styling, defined by an elegant silhouette, linear cast iron texture, and a flush door supported by hidden hinges. The window into the stove is designed to let you see as much fire as possible from a variety of locations in the room.\u003c\/p\u003e\n\u003ch4\u003e6-Inch Flue with Top or Rear Exit\u003c\/h4\u003e\n\u003cp\u003eThe Model 8681 features a 6\" flue collar and can be vented through the top or the rear of the stove. To support the firebox, HearthStone focused on the ease of airflow through the stove, supporting quick starting and efficient burning. Minimum chimney height differs by exit: a top-exit installation requires a minimum chimney height of 16 feet off the floor, or 13 feet 5 inches from the top of the stove, while a rear-exit installation requires a minimum of 19 feet off the floor, or 16 feet 5 inches from the top of the stove. The stove requires a draft between 0.06\" and 0.1\" water column; for drafts above 0.1\" WC, HearthStone directs installation of a stovepipe damper.\u003c\/p\u003e\n\u003ch4\u003eHeating Performance\u003c\/h4\u003e\n\u003cp\u003eHearthStone publishes a heating area of up to a maximum of 2,500 square feet and a maximum heat output of 80,000 BTU per hour of maple cordwood. Under EPA Method 28 test conditions using Douglas Fir crib wood, the Model 8681 delivered heat at rates ranging from 14,846 to 33,424 BTU (output). HearthStone states in the current owner's manual that the Green Mountain 80 should not be considered the primary heat source for a home, and that factors unique to a given house can reduce the square footage the stove will heat.\u003c\/p\u003e\n\u003ch4\u003eEveryday Controls\u003c\/h4\u003e\n\u003cp\u003eA single primary air lever under the ash lip regulates the burn rate, a bypass handle controls catalyst engagement, and a catalyst thermometer shows when the stove is in the active temperature range. The front door is operated by a wood handle, and the primary air control will not close completely, so the minimum allowable airflow is always maintained.\u003c\/p\u003e\n\u003ch3\u003eAvailable Finish and Configuration\u003c\/h3\u003e\n\u003cp\u003eThe Green Mountain 80 Model 8681 is currently orderable in one configuration.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFinish\u003c\/th\u003e\n\u003cth\u003ePart ID\u003c\/th\u003e\n\u003cth\u003eMSRP\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlack Matte\u003c\/td\u003e\n\u003ctd\u003e8681-0010\u003c\/td\u003e\n\u003ctd\u003e$4,799\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003ePricing notice:\u003c\/strong\u003e The price shown is the current manufacturer-suggested retail price for the stove. Chimney components, hearth protection, accessories, delivery, installation, and applicable taxes are additional.\u003c\/p\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ch4\u003ePerformance\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003ctd\u003e8681\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCombustion system\u003c\/th\u003e\n\u003ctd\u003eTruHybrid™ — primary, secondary, and catalytic tertiary combustion\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCatalytic combustor\u003c\/th\u003e\n\u003ctd\u003eApplied Ceramics ACI-6M2, three required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeating area\u003c\/th\u003e\n\u003ctd\u003eUp to a maximum of 2,500 sq ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum heat output\u003c\/th\u003e\n\u003ctd\u003e80,000 BTU per hour of maple cordwood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTested heat output range\u003c\/th\u003e\n\u003ctd\u003e14,846 to 33,424 BTU (output) under specific test conditions, using Douglas Fir crib wood per the Method 28 loading parameters\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeatLife™\u003c\/th\u003e\n\u003ctd\u003eUp to 30 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTypical operating range\u003c\/th\u003e\n\u003ctd\u003e800°F to 1300°F catalyst temperature\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eFirebox and Fuel\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eFuel type\u003c\/th\u003e\n\u003ctd\u003eNatural cordwood only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFirebox capacity\u003c\/th\u003e\n\u003ctd\u003e3.15 cu ft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaximum log length\u003c\/th\u003e\n\u003ctd\u003eUp to 23\" (58.4 cm), left to right\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCertification test log length\u003c\/th\u003e\n\u003ctd\u003e19¾\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eDimensions and Weight\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eHeight\u003c\/th\u003e\n\u003ctd\u003e32¾\" (83 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWidth\u003c\/th\u003e\n\u003ctd\u003e29½\" (75 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDepth\u003c\/th\u003e\n\u003ctd\u003e25\" (63 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWeight\u003c\/th\u003e\n\u003ctd\u003e550 lbs (250 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCrate dimensions\u003c\/th\u003e\n\u003ctd\u003eH 40\" x W 41\" x L 31\" (102 x 104 x 79 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eFlue and Installation\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eFlue exit location\u003c\/th\u003e\n\u003ctd\u003eTop or rear\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFlue collar and connector size\u003c\/th\u003e\n\u003ctd\u003e6\" (153 mm) diameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMetal chimney requirement\u003c\/th\u003e\n\u003ctd\u003e6\" (153 mm) inside diameter, listed Type HT (2100°F) per UL 103 or ULC S629\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMasonry chimney requirement\u003c\/th\u003e\n\u003ctd\u003eCode-approved lined chimney; 6\" (153 mm) round flue or 7\" x 7\" (178 x 178 mm) square flue per the specification table. HearthStone requires a 6\" inside diameter flue for new installations and recommends a maximum 6\" diameter or 6\" x 6\" tile size for best results\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMinimum chimney height, top exit\u003c\/th\u003e\n\u003ctd\u003e16 feet (4.9 m) off the floor, or 13 feet 5 inches (4.1 m) from the top of the stove\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMinimum chimney height, rear exit\u003c\/th\u003e\n\u003ctd\u003e19 feet (5.8 m) off the floor, or 16 feet 5 inches (5.0 m) from the top of the stove\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended maximum chimney height\u003c\/th\u003e\n\u003ctd\u003e30 feet (9 m)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRequired draft\u003c\/th\u003e\n\u003ctd\u003e0.06\" to 0.1\" water column; drafts above 0.1\" WC require a stovepipe damper\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eOutside air connection\u003c\/th\u003e\n\u003ctd\u003eOptional kit 96-53400, minimum 3\" (76 mm) diameter duct supplied by others; optional 3\" to 4\" duct adapter, kit 90-53308\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInstallation type\u003c\/th\u003e\n\u003ctd\u003eFreestanding room heater only. Per the current owner's manual, the stove is not to be installed in any factory-built fireplace, or any fireplace\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMobile home approval\u003c\/th\u003e\n\u003ctd\u003eApproved when installed in accordance with 24 CFR Part 3280 and the manufacturer's special mobile home requirements described below\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eEfficiency, Emissions, and Certification\u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eHHV efficiency\u003c\/th\u003e\n\u003ctd\u003e80% weighted average across four burn-rate categories, measured using EPA Method 28R and CSA B415-10 methodology\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eParticulate emissions\u003c\/th\u003e\n\u003ctd\u003e0.53 g\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eEPA certification\u003c\/th\u003e\n\u003ctd\u003eCertified to comply with the U.S. EPA 2020 particulate emissions standard, tested to EPA Method 28R, 40 CFR Part 60 where applicable, using crib wood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCertification report\u003c\/th\u003e\n\u003ctd\u003ePFS Report F24-314\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCO emissions by burn category\u003c\/th\u003e\n\u003ctd\u003eCategory 1 (low) 22.8 g\/hr, Category 2 (medium low) 11.7 g\/hr, Category 3 (medium high) 1.7 g\/hr, Category 4 41.2 g\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTested standards\u003c\/th\u003e\n\u003ctd\u003eConforms to UL Std. 1482-2022; certified to ULC Std. S627-2023\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eClearances and Hearth Requirements\u003c\/h3\u003e\n\u003cp\u003eThe values below are from the current Green Mountain 80 Model 8681 owner's manual, 6400-40100 (revision 5\/30\/2025). Dimensions are measured from the edge of the top cast iron unless otherwise indicated, with a straight stovepipe directly through the ceiling. Reduced rear clearances require the HearthStone rear heat shield, kit 5968-011. Double-wall connector figures shown by HearthStone are specific to Simpson Dura-Vent DVL and may vary with other brands.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eInstallation Configuration\u003c\/th\u003e\n\u003cth\u003eSide — edge of top casting to side wall\u003c\/th\u003e\n\u003cth\u003eRear — edge of top casting to rear wall\u003c\/th\u003e\n\u003cth\u003eConnector centerline to rear wall\u003c\/th\u003e\n\u003cth\u003eConnector centerline to side wall\u003c\/th\u003e\n\u003cth\u003eCorner — edge of top casting to corner wall\u003c\/th\u003e\n\u003cth\u003eCorner — connector centerline to corner wall\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnited States — single-wall connector, no rear heat shield\u003c\/td\u003e\n\u003ctd\u003e17½\" (445 mm)\u003c\/td\u003e\n\u003ctd\u003e15½\" (394 mm)\u003c\/td\u003e\n\u003ctd\u003e21\" (534 mm)\u003c\/td\u003e\n\u003ctd\u003e32\" (813 mm)\u003c\/td\u003e\n\u003ctd\u003e7½\" (191 mm)\u003c\/td\u003e\n\u003ctd\u003e21\" (534 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnited States — single-wall connector with rear heat shield 5968-011\u003c\/td\u003e\n\u003ctd\u003e17½\" (445 mm)\u003c\/td\u003e\n\u003ctd\u003e5½\" (140 mm)\u003c\/td\u003e\n\u003ctd\u003e11\" (280 mm)\u003c\/td\u003e\n\u003ctd\u003e32\" (813 mm)\u003c\/td\u003e\n\u003ctd\u003e7½\" (191 mm)\u003c\/td\u003e\n\u003ctd\u003e21\" (534 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnited States — double-wall connector, no rear heat shield\u003c\/td\u003e\n\u003ctd\u003e17½\" (445 mm)\u003c\/td\u003e\n\u003ctd\u003e15½\" (394 mm)\u003c\/td\u003e\n\u003ctd\u003e21\" (534 mm)\u003c\/td\u003e\n\u003ctd\u003e32\" (813 mm)\u003c\/td\u003e\n\u003ctd\u003e7½\" (191 mm)\u003c\/td\u003e\n\u003ctd\u003e21\" (534 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnited States — double-wall connector with rear heat shield 5968-011\u003c\/td\u003e\n\u003ctd\u003e17½\" (445 mm)\u003c\/td\u003e\n\u003ctd\u003e3½\" (89 mm)\u003c\/td\u003e\n\u003ctd\u003e9\" (229 mm)\u003c\/td\u003e\n\u003ctd\u003e32\" (813 mm)\u003c\/td\u003e\n\u003ctd\u003e7½\" (191 mm)\u003c\/td\u003e\n\u003ctd\u003e21\" (534 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCanada — single-wall connector with rear heat shield (Canadian requirement)\u003c\/td\u003e\n\u003ctd\u003e17½\" (445 mm)\u003c\/td\u003e\n\u003ctd\u003e15½\" (394 mm)\u003c\/td\u003e\n\u003ctd\u003e21\" (534 mm)\u003c\/td\u003e\n\u003ctd\u003e32\" (813 mm)\u003c\/td\u003e\n\u003ctd\u003e7½\" (191 mm)\u003c\/td\u003e\n\u003ctd\u003e21\" (534 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlcove — single-wall connector, no rear heat shield\u003c\/td\u003e\n\u003ctd\u003e17½\" (445 mm)\u003c\/td\u003e\n\u003ctd\u003e15½\" (394 mm)\u003c\/td\u003e\n\u003ctd\u003e21\" (534 mm)\u003c\/td\u003e\n\u003ctd\u003e32\" (813 mm)\u003c\/td\u003e\n\u003ctd\u003e7½\" (191 mm)\u003c\/td\u003e\n\u003ctd\u003e21\" (534 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlcove — single-wall connector with rear heat shield 5968-011\u003c\/td\u003e\n\u003ctd\u003e17½\" (445 mm)\u003c\/td\u003e\n\u003ctd\u003e5½\" (140 mm)\u003c\/td\u003e\n\u003ctd\u003e11\" (280 mm)\u003c\/td\u003e\n\u003ctd\u003e32\" (813 mm)\u003c\/td\u003e\n\u003ctd\u003e7½\" (191 mm)\u003c\/td\u003e\n\u003ctd\u003e21\" (534 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlcove — double-wall connector, no rear heat shield\u003c\/td\u003e\n\u003ctd\u003e17½\" (445 mm)\u003c\/td\u003e\n\u003ctd\u003e15½\" (394 mm)\u003c\/td\u003e\n\u003ctd\u003e21\" (534 mm)\u003c\/td\u003e\n\u003ctd\u003e32\" (813 mm)\u003c\/td\u003e\n\u003ctd\u003e7½\" (191 mm)\u003c\/td\u003e\n\u003ctd\u003e21\" (534 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlcove — double-wall connector with rear heat shield 5968-011\u003c\/td\u003e\n\u003ctd\u003e17½\" (445 mm)\u003c\/td\u003e\n\u003ctd\u003e5½\" (140 mm)\u003c\/td\u003e\n\u003ctd\u003e11\" (280 mm)\u003c\/td\u003e\n\u003ctd\u003e32\" (813 mm)\u003c\/td\u003e\n\u003ctd\u003e7½\" (191 mm)\u003c\/td\u003e\n\u003ctd\u003e21\" (534 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eIn Canada, single-wall connector installations with the rear heat shield keep the unshielded clearances shown above because of connector pipe minimum-clearance requirements; the reduced U.S. rear values do not apply. The rear heat shield reduces only the rear and connector-to-rear-wall values shown in the manual tables; side and corner clearances are unchanged. The minimum unprotected ceiling height for all vertical-exit installations is 92⅜\" (234.6 cm).\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAlcove, trim, and mantel clearances, unprotected surfaces\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eMeasurement\u003c\/th\u003e\n\u003cth\u003eRequired Dimension\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum alcove width\u003c\/td\u003e\n\u003ctd\u003e64½\" (163.8 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum alcove ceiling height from floor, single-wall connector\u003c\/td\u003e\n\u003ctd\u003e83⅜\" (211.7 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum alcove ceiling height from floor, double-wall connector\u003c\/td\u003e\n\u003ctd\u003e83⅜\" (211.7 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAlcove side clearance\u003c\/td\u003e\n\u003ctd\u003e17½\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnshielded mantel height from floor\u003c\/td\u003e\n\u003ctd\u003e68⅜\" (173.7 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMantel reference projection, from the front of the stove as shown in the manual figure\u003c\/td\u003e\n\u003ctd\u003e28\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePipe centerline to front of stove, reference dimension\u003c\/td\u003e\n\u003ctd\u003e15⅞\" (403 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe 83⅜\" alcove ceiling height applies to alcove installations; it is a different requirement from the 92⅜\" minimum unprotected ceiling height for vertical-exit installations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eRear-exit installation clearances\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe values below apply to a through-the-wall flue exit using an elbow directly atop the stove to a rear exit, or using the stove's rear exit. The manual publishes the same values for single-wall and double-wall rear-exit pipe.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eInstallation Configuration\u003c\/th\u003e\n\u003cth\u003eBack wall to center of pipe\u003c\/th\u003e\n\u003cth\u003eBack wall to edge of pipe\u003c\/th\u003e\n\u003cth\u003eBack wall to edge of top casting\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWith rear heat shield 5968-011 — United States\u003c\/td\u003e\n\u003ctd\u003e11\" (280 mm)\u003c\/td\u003e\n\u003ctd\u003e8\" (204 mm)\u003c\/td\u003e\n\u003ctd\u003e5½\" (140 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWith rear heat shield 5968-011 — Canada\u003c\/td\u003e\n\u003ctd\u003e11\" (280 mm)\u003c\/td\u003e\n\u003ctd\u003e8\" (204 mm)\u003c\/td\u003e\n\u003ctd\u003e5½\" (140 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNo rear heat shield — United States\u003c\/td\u003e\n\u003ctd\u003e21\" (534 mm)\u003c\/td\u003e\n\u003ctd\u003e18\" (458 mm)\u003c\/td\u003e\n\u003ctd\u003e15½\" (394 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNo rear heat shield — Canada\u003c\/td\u003e\n\u003ctd\u003e21\" (534 mm)\u003c\/td\u003e\n\u003ctd\u003e18\" (458 mm)\u003c\/td\u003e\n\u003ctd\u003e15½\" (394 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003ePipe clearances apply to all sides of the connection pipe. Single-wall connector pipe generally requires 18\" of clearance, including to the ceiling; for double-wall pipe clearance to the ceiling, refer to the pipe manufacturer's specifications. Use the parallel clearances above for the stove's side-wall requirements in rear-exit installations.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHearth and floor protection\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCombustible flooring must be protected with a covering of noncombustible material. The Green Mountain 80 does not require an insulated hearth pad and there is no R-value requirement; the requirement is ember protection. The stove is compliant to CAN\/ULC-S627 for installation directly over a combustible floor with proper ember protection, and radiant floor insulation protection is not required.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry\u003c\/th\u003e\n\u003cth\u003eMinimum Floor Protection\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnited States\u003c\/td\u003e\n\u003ctd\u003e38\" W x 36½\" D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCanada\u003c\/td\u003e\n\u003ctd\u003e45½\" W x 46¼\" D\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eCountry\u003c\/th\u003e\n\u003cth\u003eMeasurement\u003c\/th\u003e\n\u003cth\u003eRequired Extension\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnited States\u003c\/td\u003e\n\u003ctd\u003eFront extension, from the firebox-door opening\u003c\/td\u003e\n\u003ctd\u003e16\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnited States\u003c\/td\u003e\n\u003ctd\u003eSide extension, from the firebox opening\u003c\/td\u003e\n\u003ctd\u003e8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUnited States and Canada\u003c\/td\u003e\n\u003ctd\u003eHearth edge to chimney connector pipe, rear area\u003c\/td\u003e\n\u003ctd\u003e2\" (51 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCanada\u003c\/td\u003e\n\u003ctd\u003eFront extension, from the firebox-door opening\u003c\/td\u003e\n\u003ctd\u003e18\" (457 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCanada\u003c\/td\u003e\n\u003ctd\u003eSide extension, from the side of the stove\u003c\/td\u003e\n\u003ctd\u003e8\" (203 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCanada\u003c\/td\u003e\n\u003ctd\u003eRear extension, from the rear of the stove body\u003c\/td\u003e\n\u003ctd\u003e8\" (203 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eHearthStone notes that luxury vinyl plank and luxury vinyl tile flooring warrants extra consideration, as some products begin to warp at 110° Fahrenheit, and that additional shielding may be necessary depending on the flooring used. Clearances to combustible surfaces may be reduced using an NFPA 211 approved wall protection system with the additional approval of the regulatory authority having jurisdiction.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eMobile and manufactured home installation:\u003c\/strong\u003e The Model 8681 may be installed in a mobile home subject to the manufacturer's special requirements, including installation in accordance with 24 CFR Part 3280 (HUD); use of the outside air kit in all mobile home installations; permanent attachment of the stove to the floor using the shipping clips; a mobile home chimney and connector kit conforming to UL 103 or ULC S629 with a spark arrester secured to the chimney; maintaining the structural integrity of the walls, floor, ceiling, and roof; meeting the chimney height and roof-clearance requirements in the manual; and removal of the chimney when transporting the mobile home. The stove must not be installed in a sleeping room in a mobile home.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eInstallation notice:\u003c\/strong\u003e Clearances and hearth requirements vary by connector type, shielding, and installation configuration. Refer to the current Green Mountain 80 Model 8681 owner's manual and applicable local requirements before installation.\u003c\/p\u003e\n\u003ch3\u003eIncluded Equipment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGreen Mountain 80-1 Model 8681 woodstove\u003c\/li\u003e\n\u003cli\u003eStone Kit A\u003c\/li\u003e\n\u003cli\u003eStone Kit B\u003c\/li\u003e\n\u003cli\u003eOwner's manual with installation and operating instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eA separate box beneath the stove contains some of the internal parts, with an instruction sheet for installing them.\u003c\/p\u003e\n\u003ch3\u003eCompatible Accessories\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eAccessory\u003c\/th\u003e\n\u003cth\u003ePart ID\u003c\/th\u003e\n\u003cth\u003eMSRP\u003c\/th\u003e\n\u003cth\u003eCompatibility or Requirement Note\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutside Air Starter\u003c\/td\u003e\n\u003ctd\u003e96-53400\u003c\/td\u003e\n\u003ctd\u003e$109\u003c\/td\u003e\n\u003ctd\u003eRequired for all mobile home installations; connects the stove's air intake to a minimum 3\" duct, supplied by others.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eConvection Blower\u003c\/td\u003e\n\u003ctd\u003e96-57801\u003c\/td\u003e\n\u003ctd\u003e$549\u003c\/td\u003e\n\u003ctd\u003eRequires Rear Heat Shield 5968-011, which provides the attachment for the blower.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRear Heat Shield\u003c\/td\u003e\n\u003ctd\u003e5968-011\u003c\/td\u003e\n\u003ctd\u003e$189\u003c\/td\u003e\n\u003ctd\u003eRequired for blower installation; also provides the reduced rear-clearance configurations published in the current manual. Does not change side or corner clearances.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\" to 4\" Outside Air Increaser\u003c\/td\u003e\n\u003ctd\u003e90-53308\u003c\/td\u003e\n\u003ctd\u003e$49\u003c\/td\u003e\n\u003ctd\u003eFor adapting the 3-inch outside-air connection to 4-inch duct where needed.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eAll accessories listed above are optional and sold separately unless expressly stated otherwise.\u003c\/p\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cp\u003eHearthStone warrants the appliance to the original retail purchaser only, when purchased by that purchaser and installed by an authorized HearthStone dealer or their designated representative, against defects in material or workmanship. Coverage begins on the date of the original invoice and is not transferable to subsequent owners.\u003c\/p\u003e\n\u003cp\u003eWarranty periods differ by component. HearthStone defines the term \"Limited Lifetime\" as 10 years from the beginning of warranty coverage, and applies it to the stone, to cast iron not listed elsewhere, and to the clean-burning air supply system. Door handles and latches and steel components and the firebox carry a 5-year period. Appliance electrical components and refractory, vermiculite panels, and baffles carry a 2-year period. Enamel finish against peeling or fading, glass, accessories, and all components not listed elsewhere carry a 1-year period. The catalytic combustors are covered directly by the combustor manufacturer, Applied Ceramics, under a separate limited warranty that provides free replacement within two years of purchase and prorated replacement pricing thereafter.\u003c\/p\u003e\n\u003cp\u003eHearthStone pays for warranty labor performed by an authorized dealer during the first year after the purchase date only when the appliance was installed by an authorized dealer or their designated representative; otherwise, and thereafter, labor is the purchaser's responsibility. Exclusions include over-firing, improper installation or operation, service by anyone other than an authorized dealer, use of unapproved fuels or components, water and corrosion damage, and normal wear parts such as paint, gaskets, baffles, refractory materials, and glass. Surface and hairline cracks and scratches in the stone that do not affect operation or safety are excluded, and HearthStone's obligation does not extend to the appliance's ability to heat a desired space. Warranty registration is not required as a condition of coverage. Refer to the complete warranty in the current Green Mountain 80 Model 8681 owner's manual for the full terms, conditions, and limitations.\u003c\/p\u003e\n\u003ch3\u003eAbout HearthStone\u003c\/h3\u003e\n\u003cp\u003eHearthStone Quality Home Heating Products builds wood- and gas-burning hearth appliances in Morrisville, Vermont, and has been building industry-leading products since 1978. Its stoves are handcrafted by Vermont craftsmen from materials including heating-grade soapstone, cast iron produced at the company's own foundry in Spain, precision-made steel, and engineered ceramics, and every HearthStone soapstone stove is signed by the stove builder. The company's TruHybrid™ system, used across its current wood stove line, adds catalytic tertiary combustion to primary and secondary combustion.\u003c\/p\u003e","brand":"Hearthstone Stoves","offers":[{"title":"Default Title","offer_id":53617276256532,"sku":"8681","price":4799.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0809\/9381\/2756\/files\/GM80-8681_scene3_250303.webp?v=1786286312","url":"https:\/\/cozyglowstoves.com\/products\/hearthstone-stoves-green-mountain-80-freestanding-wood-stove","provider":"Cozy Glow Stoves","version":"1.0","type":"link"}