{"product_id":"hearthstone-stoves-green-mountain-insert-90-wood-fireplace-insert","title":"Hearthstone Stoves Green Mountain Insert 90 Wood Fireplace Insert","description":"\u003ch2\u003eLarge-Capacity Soapstone-Lined Wood Heat for Your Existing Fireplace\u003c\/h2\u003e\n\u003cp\u003eThe Green Mountain Insert 90 (GMi90, Model 8460) is HearthStone's large non-catalytic wood fireplace insert with a flush cast iron front, 2.5 cu. ft. soapstone-lined firebox, and factory-installed blower.\u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eLarge soapstone-lined firebox\u003c\/strong\u003e — a 2.5 cu. ft. firebox lined with natural soapstone accepts logs up to 20 inches and radiates steady warmth as the fire burns down.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFlush cast iron design\u003c\/strong\u003e — the insert sits flush with the fireplace facing for a built-in look, with a cast iron front in Black Matte or Brown Enamel.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNon-catalytic secondary combustion\u003c\/strong\u003e — secondary air tubes and a baffle burn off gases released by the wood; a single-lever primary air control sets the burn rate.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEPA 2020 certified using cordwood\u003c\/strong\u003e — certified at 1.14 g\/hr particulate emissions with a 68% (HHV) weighted average efficiency, per the current owner's manual.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaximum cordwood heat output of 80,000 BTU\/hr\u003c\/strong\u003e — with heating coverage of up to 2,200 square feet, depending on home layout, insulation, and operating conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIncluded convection blower\u003c\/strong\u003e — the unit ships complete with a factory-installed blower offering automatic heat-sensing operation, a manual mode, and variable speed.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeatLife up to 9+ hours\u003c\/strong\u003e — per the current owner's manual, soapstone extends usable heat well after the active flames decline.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\u003ch4\u003eLarge Soapstone-Lined Firebox\u003c\/h4\u003e\n\u003cp\u003eThe firebox is lined with natural soapstone panels over a steel firebox body. Soapstone absorbs heat during the burn and releases it gradually, moderating temperature swings and extending comfortable warmth. The firebox capacity is 2.5 cu. ft., with a maximum log length of up to 20 inches, and the manual notes the insert is intended to supplement rather than serve as the primary heat source for a home.\u003c\/p\u003e\n\u003ch4\u003eNon-Catalytic Secondary Combustion\u003c\/h4\u003e\n\u003cp\u003eA single primary air control lever under the ash lip regulates the burn rate from high to low (the control does not close completely). Secondary air tubes beneath the baffle at the top of the firebox supply air to burn gases released by the wood, and an air-wash system helps keep the ceramic glass clear for viewing the fire. The glass is a clear ceramic material capable of operating at temperatures up to 2300°F.\u003c\/p\u003e\n\u003ch4\u003eIncluded Convection Blower\u003c\/h4\u003e\n\u003cp\u003eA blower is factory installed behind the faceplate at the bottom of the insert to move room air through the convection air jacket. A rocker switch selects automatic or manual mode and a rheostat sets the blower speed. In automatic mode the blower starts when the insert is warm and stops as it cools; in manual mode it runs until switched off. A 90-degree connector is supplied for optional hardwiring through the rear of the insert. The current dealer sheet confirms the unit ships complete with the blower.\u003c\/p\u003e\n\u003ch4\u003eCast Iron Flush Design\u003c\/h4\u003e\n\u003cp\u003eThe GMi90 is designed to sit flush with the fireplace facing, framing the fire with a cast iron front and door. An optional three-piece steel surround attaches behind the cast iron faceplate to trim the transition to the fireplace opening; current HearthStone materials list surround coverage of approximately 50 inches wide by 34-1\/2 inches tall.\u003c\/p\u003e\n\u003ch4\u003eFlexible Fireplace Fit\u003c\/h4\u003e\n\u003cp\u003eThe GMi90 is designed for installation in a compliant masonry fireplace and chimney, or in a qualifying listed factory-built fireplace system that meets every condition in the current Model 8460 manual, including listing to UL 127 or ULC S610 and a full-height listed chimney liner. An optional surround extension lets the insert project farther into the room, reducing the minimum fireplace depth per the manual. The GMi90 is not approved for mobile home installation and is not a freestanding stove.\u003c\/p\u003e\n\u003ch4\u003eFull-Length 6-Inch Liner Requirement\u003c\/h4\u003e\n\u003cp\u003eThe GMi90 must be connected to a listed 6-inch stainless steel flexible connector and a continuous listed 6-inch stainless steel liner extending from the insert to the top of the chimney, using liners meeting UL 1777, ULC S635, or ULC S640 as applicable. A sealed block-off plate or noncombustible plug is required at the existing fireplace damper area, the fireplace damper must be removed or locked open, and the insert must never share a flue with another appliance or connect to any air-distribution duct. The manual requires a draft between 0.06 and 0.10 inches of water column, with a stovepipe damper installed where draft exceeds 0.10 inches.\u003c\/p\u003e\n\u003ch3\u003eAvailable Finishes and Configurations\u003c\/h3\u003e\n\u003cp\u003eThe GMi90 is a single base model available in two finishes. Pricing varies by finish.\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\u003cth\u003eNotes\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\u003e8460-0010\u003c\/td\u003e\n\u003ctd\u003e$5,399\u003c\/td\u003e\n\u003ctd\u003eShips complete with the factory-installed blower.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrown Enamel\u003c\/td\u003e\n\u003ctd\u003e8460-0020\u003c\/td\u003e\n\u003ctd\u003e$5,849\u003c\/td\u003e\n\u003ctd\u003eShips complete with the factory-installed blower.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eSpecification\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003eGreen Mountain Insert 90 (GMi90), Model 8460\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAppliance type\u003c\/td\u003e\n\u003ctd\u003eWood fireplace insert\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCombustion system\u003c\/td\u003e\n\u003ctd\u003eNon-catalytic secondary combustion (secondary air tubes and baffle), single-lever primary air control\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEPA certification\u003c\/td\u003e\n\u003ctd\u003eEPA 2020 particulate standard, certified using cordwood; tested to EPA Alt 125 where applicable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHHV efficiency\u003c\/td\u003e\n\u003ctd\u003e68% weighted average, per current owner's manual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEPA particulate emissions\u003c\/td\u003e\n\u003ctd\u003e1.14 g\/hr, per current owner's manual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum cordwood heat output\u003c\/td\u003e\n\u003ctd\u003e80,000 BTU\/hr\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEPA tested output\u003c\/td\u003e\n\u003ctd\u003e14,200–48,200 BTU\/hr under specific test conditions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeating area\u003c\/td\u003e\n\u003ctd\u003eUp to 2,200 sq. ft., depending on home and installation conditions\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFirebox capacity\u003c\/td\u003e\n\u003ctd\u003e2.5 cu. ft.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum log length\u003c\/td\u003e\n\u003ctd\u003eUp to 20\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeatLife\u003c\/td\u003e\n\u003ctd\u003eUp to 9+ hours, per current owner's manual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e38-1\/2\" W × 24-7\/8\" D × 28-3\/4\" H\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e440 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFlue outlet\u003c\/td\u003e\n\u003ctd\u003e6\" diameter, top\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVenting\u003c\/td\u003e\n\u003ctd\u003eContinuous listed 6\" stainless steel chimney liner to the top of the chimney; existing 8\" flue may be used with an appropriate reducer per the manual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMasonry chimney flue\u003c\/td\u003e\n\u003ctd\u003e6\" round, or 8\" × 8\" square\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRequired draft\u003c\/td\u003e\n\u003ctd\u003e0.06\"–0.10\" WC; stovepipe damper required above 0.10\" WC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRecommended chimney height\u003c\/td\u003e\n\u003ctd\u003e10 ft minimum, 30 ft maximum, provided adequate draft is achieved\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBlower\u003c\/td\u003e\n\u003ctd\u003eIncluded, factory installed, automatic and manual modes with variable speed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutside air\u003c\/td\u003e\n\u003ctd\u003eOptional Outside Air Kit 94-53500; minimum 3\" duct supplied by others per the current manual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFuel\u003c\/td\u003e\n\u003ctd\u003eDry, seasoned natural cordwood only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish options\u003c\/td\u003e\n\u003ctd\u003eBlack Matte or Brown Enamel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInstallation\u003c\/td\u003e\n\u003ctd\u003eCompliant masonry fireplace and chimney, or qualifying listed factory-built fireplace system, per current manual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMobile home\u003c\/td\u003e\n\u003ctd\u003eNot approved for mobile home installation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSafety listing\u003c\/td\u003e\n\u003ctd\u003eUL 1482 and UL 737 (USA); ULC S628 (Canada)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eFireplace Opening, Clearances and Hearth Requirements\u003c\/h3\u003e\n\u003cp\u003eThe GMi90 must be installed with a continuous 6-inch listed stainless steel chimney liner to the top of the chimney. Masonry fireplaces must have a code-approved lined chimney, and factory-built fireplaces must be listed to UL 127 or ULC S610, include a full-height listed liner, keep room air out of the chimney cavity, retain unblocked cooling-air and circulating chambers, remain unaltered except as the manual permits, and carry the permanent warning label supplied with the GMi90. Do not connect the insert to a chimney flue serving another appliance. The GMi90 is not approved for mobile home installation.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eMinimum Fireplace Opening\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e31-3\/4\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHeight\u003c\/td\u003e\n\u003ctd\u003e27-1\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth, standard installation\u003c\/td\u003e\n\u003ctd\u003e22-1\/8\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDepth, with surround extension (projection configurations)\u003c\/td\u003e\n\u003ctd\u003e20-1\/8\" or 18-1\/8\", depending on the projection configuration used per the current manual\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eWhere a fresh-air intake is required, HearthStone recommends adding at least 4 inches to the minimum fireplace-opening width. The optional surround extension permits the shallower installation depths by allowing the insert to project into the room when installed according to the current manual.\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eClearance\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eAdjacent combustible side wall\u003c\/td\u003e\n\u003ctd\u003e19\" from the insert body\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCombustible side trim or surround\u003c\/td\u003e\n\u003ctd\u003e9-1\/2\" from the insert body\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCombustible top surround or trim\u003c\/td\u003e\n\u003ctd\u003e12\" above the insert, per the manual's upper-reference clearance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCombustible mantel\u003c\/td\u003e\n\u003ctd\u003e40-3\/4\" minimum from the bottom of the insert per current HearthStone materials; this corresponds to the current manual's 12\" clearance above the applicable upper insert reference\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum combustible mantel depth\u003c\/td\u003e\n\u003ctd\u003e12\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum combustible side trim thickness\u003c\/td\u003e\n\u003ctd\u003e5\"\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCeiling\u003c\/td\u003e\n\u003ctd\u003e84\"\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\u003eHearth and Floor Protection\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum floor protection, USA\u003c\/td\u003e\n\u003ctd\u003e41-1\/2\" wide × 16\" in front, measured from the door opening\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum floor protection, Canada\u003c\/td\u003e\n\u003ctd\u003e48\" wide × 18\" in front, measured from the door opening\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInsulated hearth pad\u003c\/td\u003e\n\u003ctd\u003eNot required; there is no R-value requirement\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eNoncombustible ember protection such as a continuous layer of tile, brick, slate, glass, or other noncombustible facing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe current manual does not require an insulated hearth pad for the GMi90; combustible flooring in front of the insert must be covered with noncombustible material to the dimensions above. For raised and non-raised installations, and where the insert projects into the room, any additional floor protection is determined using the manual's floor-protection figures and the projection dimensions of the installation. Some luxury vinyl plank and tile flooring may begin to warp at approximately 110°F; consult the flooring manufacturer for maximum temperature limits, as additional shielding may be needed depending on the flooring used. The current owner's manual governs every installation; review it with your installer and local building official for complete requirements.\u003c\/p\u003e\n\u003ch3\u003eIncluded Equipment\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eGreen Mountain Insert 90 Model 8460 wood fireplace insert\u003c\/li\u003e\n\u003cli\u003eFactory-installed convection blower (the unit ships complete with the blower)\u003c\/li\u003e\n\u003cli\u003eThree boxes of refractory stone firebox lining (two rear, two side-rear, and two side-front stones)\u003c\/li\u003e\n\u003cli\u003eSide stone retainer brackets\u003c\/li\u003e\n\u003cli\u003eLeg leveling bolts (quantity 2)\u003c\/li\u003e\n\u003cli\u003e90-degree Romex connector for optional blower hardwiring\u003c\/li\u003e\n\u003cli\u003eRear valence cover bracket (installed or packed with the insert)\u003c\/li\u003e\n\u003cli\u003eSafety label (attached to the insert)\u003c\/li\u003e\n\u003cli\u003eOwner's manual\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatible Accessories\u003c\/h3\u003e\n\u003cp\u003eAll accessories are sold separately and installed per their instructions and the current manual.\u003c\/p\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\u003eNotes\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eSteel Surround\u003c\/td\u003e\n\u003ctd\u003e94-5960010\u003c\/td\u003e\n\u003ctd\u003e$149\u003c\/td\u003e\n\u003ctd\u003eThree-piece steel surround that attaches behind the cast iron faceplate to frame the fireplace opening.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSurround Extension\u003c\/td\u003e\n\u003ctd\u003e94-5960110\u003c\/td\u003e\n\u003ctd\u003e$219\u003c\/td\u003e\n\u003ctd\u003eInstalled between the cast iron faceplate and the steel surround; allows the insert to project farther into the room, reducing the minimum required fireplace depth per the current manual.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFire Screen Insert\u003c\/td\u003e\n\u003ctd\u003e94-69110\u003c\/td\u003e\n\u003ctd\u003e$349\u003c\/td\u003e\n\u003ctd\u003ePermits attended open-door fire viewing under the manufacturer's instructions; never leave the insert unattended while the fire screen is in use.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eLiner Hook-Up Starter Collar\u003c\/td\u003e\n\u003ctd\u003e94-67500\u003c\/td\u003e\n\u003ctd\u003e$160\u003c\/td\u003e\n\u003ctd\u003eConnects to the chimney liner before the insert is placed, then secures to the insert once it is in the fireplace.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMantel Shield\u003c\/td\u003e\n\u003ctd\u003e94-79700\u003c\/td\u003e\n\u003ctd\u003e$239\u003c\/td\u003e\n\u003ctd\u003eShield for combustible mantels, approximately 48\" wide and trimmable; install per the current instructions.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOffset Liner Adapter\u003c\/td\u003e\n\u003ctd\u003e5700-007\u003c\/td\u003e\n\u003ctd\u003e$409\u003c\/td\u003e\n\u003ctd\u003eUsed where installation geometry requires offsetting the liner connection; installation must follow the current GMi90 manual and current accessory instructions, with proper draft verified.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOutside Air Kit\u003c\/td\u003e\n\u003ctd\u003e94-53500\u003c\/td\u003e\n\u003ctd\u003e$129\u003c\/td\u003e\n\u003ctd\u003eConnects outside combustion air to the insert where infiltration air is inadequate; requires a separately supplied duct of at least 3\" diameter per the current Model 8460 manual. In Canada the insert must be secured to the floor with the supplied shipping clips when outside air is used.\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\u003eAdapter referenced by the current manual for installations using a 4\" outside air duct.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWarranty\u003c\/h3\u003e\n\u003cp\u003eThe GMi90 is covered by HearthStone's limited warranty as published in the current owner's manual, where Limited Lifetime is defined as ten years. In summary, the applicable schedule covers stone, cast iron components not listed elsewhere, and the clean-burning air-supply system for the Limited Lifetime period; door handles, latches, steel components, and the firebox for five years; appliance electrical components, refractory, vermiculite panels, and baffles for two years; and enamel finish, glass, accessories, and components not otherwise listed for one year. Warranty labor is covered in the first year through an authorized dealer when the appliance is dealer installed, and parts shipping is covered for the first 90 days under the written terms. Coverage extends to the original purchaser and is not transferable; wear parts and conditions and exclusions apply. See the current written warranty for complete terms.\u003c\/p\u003e\n\u003ch3\u003eAbout HearthStone\u003c\/h3\u003e\n\u003cp\u003eHearthStone Quality Home Heating Products of Morrisville, Vermont has built stoves prized for long-lasting, comfortable heat for more than four decades. The Green Mountain Insert 90 brings HearthStone's signature soapstone lining to a large flush-fitting wood fireplace insert offered through authorized dealers.\u003c\/p\u003e\n\u003cp\u003eCozy Glow Stoves is an authorized HearthStone dealer. Visit our Logan, Ohio showroom to see HearthStone products in person, or contact us with questions about the GMi90, current pricing, and installation planning.\u003c\/p\u003e","brand":"Hearthstone Stoves","offers":[{"title":"Default Title","offer_id":53700379214100,"sku":"8460","price":5399.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0809\/9381\/2756\/files\/GMI90-8460_210426.webp?v=1787278349","url":"https:\/\/cozyglowstoves.com\/products\/hearthstone-stoves-green-mountain-insert-90-wood-fireplace-insert","provider":"Cozy Glow Stoves","version":"1.0","type":"link"}