HearthStone's Largest Soapstone Stove with TruHybrid™ Catalytic Combustion

Full cast iron construction with over 230 pounds of soapstone, TruHybrid™ catalytic combustion, a deep 21½" x 20½" firebox, and published burn times of up to 30+ hours.

Key Features

• TruHybrid™ combustion system combining primary and secondary combustion with catalytic tertiary combustion
• EPA certified at 0.54 g/hr particulate emissions under the 2020 EPA particulate standard, tested with crib wood
• 77.7% HHV weighted-average efficiency, measured across four burn-rate categories using EPA Method 28R and CSA B415-10 methodology
• Published burn time of up to 30+ hours, depending on wood, draft, and operating conditions
• HearthStone's largest soapstone stove, built with over 230 pounds of soapstone and full cast iron construction
• Deep 21½" wide by 20½" deep firebox accepts logs up to 21" in length
• Heats up to a maximum of 2,500 square feet, depending on insulation, floor plan, stove placement, and fuel quality
• Three current finishes: Matte Black, Brown Enamel, and Seafoam Enamel
• 6" flue collar with top or rear exit, and approval for U.S. mobile home installation when installed to the manufacturer's requirements

Product Features

TruHybrid™ Combustion Technology

The 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 Mansfield uses Applied Ceramics ACI-6M2 catalytic combustors, three required, which require periodic inspection and eventual replacement. The Mansfield typically operates in the 450°F to 1200°F flue gas range, with the catalysts becoming active around 500°F.

Soapstone and Cast Iron Construction

The Mansfield is HearthStone's largest soapstone stove, constructed with over 230 pounds of soapstone and full cast iron. 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 surface fractures may appear with use without affecting stove function.

Deep Firebox

The 21½" wide by 20½" deep firebox provides space for building large fires, and accepts logs up to 21" in length. HearthStone publishes a firebox capacity of 2.9 cubic feet in the current owner's manual.

Fire Viewing and Everyday Operation

A large glass window lets the fire be seen from a variety of locations in the room. A single primary air lever below the ash lip regulates the burn rate, the bypass handle controls catalyst engagement, and a catalyst thermometer shows when the stove is in the active temperature range. An optional ash pan with a shaker grate allows ash removal without shoveling through the front door.

Heating Performance

HearthStone 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 cordwood. Under EPA test conditions, the Mansfield 8013 delivered heat at rates ranging from 14,043 to 32,200 BTU (output). HearthStone states in the current owner's manual that the Mansfield 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.

Available Finishes and Configurations

The Mansfield 8013 is currently orderable in three finishes. Pricing varies by finish.

Pricing notice: Prices shown are current manufacturer-suggested retail prices for the stove in the selected finish. Chimney components, hearth protection, accessories, delivery, installation, and applicable taxes are additional.

Specifications

Performance

Firebox and Fuel

Dimensions and Weight

Flue and Installation

Efficiency, Emissions, and Certification

Clearances and Hearth Requirements

The values below are from the current Mansfield 8013 owner's and installation manual (revision 10/21/24). Reduced rear clearances require the HearthStone rear heat shield, kit 90-68210. Close-clearance connector pipe must be tested to UL standards and listed; double-wall figures shown by HearthStone are specific to Simpson Dura-Vent DVL and may vary with other brands. Dimensions are measured from the edge of the cast iron of the stove unless otherwise indicated.

Chimney connector clearances

Alcove installation, unprotected surfaces

Fireplace and mantel installation

Hearth and floor protection

Combustible flooring must be protected with a covering of noncombustible material. The Mansfield 8013 does not require an insulated hearth pad and there is no R-value requirement; the requirement is ember protection.

HearthStone 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.

Installation notice: Clearances and hearth requirements vary by connector type, shielding, and installation configuration. Refer to the current Mansfield 8013 installation manual and applicable local requirements before installation.

Included Equipment

• Mansfield Model 8013 woodstove with catalytic combustors installed
• Owner's manual with installation and operating instructions
• Removable bypass handle

Compatible Accessories

All accessories listed above are optional and sold separately unless expressly stated otherwise.

Warranty

HearthStone 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.

Warranty 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 carry a 2-year period. Enamel finish against peeling or fading, glass, the ash grate, 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.

HearthStone 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, ash grates, 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 Mansfield 8013 owner's manual for the full terms, conditions, and limitations.

About HearthStone

HearthStone 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.