Cast Iron Wood Fireplace Insert with a Soapstone-Lined Firebox, TruHybrid™ Catalytic Combustion, and an Included Blower and Surround

Full cast iron construction with a soapstone-lined firebox, TruHybrid™ catalytic combustion, a factory-installed blower, an included cast iron surround, and a published HeatLife™ of up to 24 hours.

Key Features

• TruHybrid™ combustion system combining primary and secondary combustion with catalytic tertiary combustion
• EPA certified at 1.16 g/hr particulate emissions under the 2015 EPA particulate standard and approved for sale after May 15, 2020, tested to EPA Methods 28, 28A, and 5H
• 79% HHV weighted-average efficiency, measured across four burn-rate categories using EPA Method 28R and CSA B415-10 methodology
• Published HeatLife™ of up to 24 hours, depending on wood, draft, and operating conditions
• Full cast iron construction with a soapstone-lined firebox for gradual radiant heat
• Generous firebox accepts logs up to 22" (55.9 cm), with 2.4 cubic feet of capacity
• Ships complete with a factory-installed blower and a cast iron surround kit
• Heats up to 2,000 square feet, depending on insulation, floor plan, and fuel quality
• Two current finishes: Matte Black and Brown Enamel
• Requires a continuous, listed 6" stainless steel chimney liner extending the full length of the chimney

Product Features

Fireplace Integration

The Clydesdale 8492 installs into a masonry fireplace built to NFPA 211 standards, with a sealed block-off plate or plug of noncombustible material at the damper area to seal the chimney from room air. The current owner's manual states the insert should not be installed in a factory-built fireplace. A continuous chimney liner with a minimum diameter of 6" must extend from the insert to the top of the chimney, conforming to the class 3 requirements of chimney liner standards ULC-S635 or ULC-S640, connected positively to the insert's flue collar. The flue collar can be installed vertically or at 30 degrees to suit the position of the liner within the fireplace.

Included Blower

The convection blower is factory installed within the front ash lip and runs only when the insert is hot. A speed control wheel in the bottom center of the ash lip adjusts the blower, and the power cord can be routed to the left or right side of the insert during installation.

Included Surround

A cast iron surround kit ships on top of the insert, with surround panels, assembly hardware, and a surround mounting bracket. An optional surround extension covers an additional 6 inches of space beyond the standard surround, and optional cast iron surround base caps continue the lines of the ash lip and attach with magnets.

Firebox and Combustion

The firebox is lined with soapstone refractory bricks that absorb the heat of the fire and release it gradually. Above the secondary air tube, HearthStone's Thermo-Ceramic baffle system maintains high temperatures in the secondary combustion area, and two Applied Ceramics ACI-6M2 catalytic combustors provide tertiary combustion. A bypass door directs combustion products around the catalysts during startup and reloading, and a catalyst thermometer indicates the active range; the Clydesdale typically operates in the 800°F to 1300°F range.

Loading and Fire Viewing

The generous firebox depth and width allows loading of wood up to 22 inches long through a 22" wide by 11.5" high front door, and the large glass window presents an open view of the fire. The front door is reversible so it can be hinged on either the left or the right side.

Available Finishes and Configurations

The Clydesdale 8492 is currently orderable in two finishes, and every unit ships complete with the blower and surround. Pricing varies by finish.

Pricing notice: Prices shown are current manufacturer-suggested retail prices for the insert in the selected finish, shipped complete with blower and surround. Chimney liner components, hearth protection, accessories, delivery, installation, and applicable taxes are additional.

Specifications

Performance

Firebox and Fuel

Dimensions and Weight

Fireplace and Surround Requirements

Flue and Installation

Efficiency, Emissions, and Certification

Clearances and Hearth Requirements

The values below are from the current Clydesdale 8492 owner's and installation manual (revision 3/14/24) and the current HearthStone Clydesdale product page. The masonry fireplace must be built to NFPA 211 standards. Minimum fireplace dimensions shown are from the current HearthStone Clydesdale product page; the minimum fireplace dimensions figure in the current owner's manual governs installation and must be verified against the printed manual before installation. The mantel shield, kit 94-79700, is available to achieve shielded mantel clearances.

Hearth and floor protection

Combustible flooring must be protected with a covering of noncombustible material such as slate or marble tile. Insulation below the noncombustible material must be R1.5, or the bottom of the insert must be installed a minimum of 7" above hearth protection with R0 insulation (13.25" if measured from the bottom of the fuel loading opening). Masonry hearths 7" or higher require ember protection only.

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.

Installation notice: Clearances and hearth requirements vary by fireplace construction, mantel depth, shielding, and installation configuration. Refer to the current Clydesdale 8492 installation manual and applicable local requirements before installation.

Included Equipment

• Clydesdale 8492 fireplace insert with façade and ash lip with factory-installed blower
• Façade top grill, in place on the insert
• Two catalytic combustors, shipped in the firebox
• Cast iron surround kit, shipped on top of the insert
• Refractory soapstone kit, two boxes
• Wood handle kit with two handles and two screws
• Owner's manual packet
• Touch-up paint pouch, enamel finishes only

Compatible Accessories

All accessories listed above are optional and sold separately unless expressly stated otherwise. The blower and surround are included with the insert.

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 Clydesdale 8492 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.