Osburn Matrix Wood Stove

United States figures, in inches. The rating plate on the appliance overrides any published number; the installer confirms on site.

From the specification sheet

Options

The unit price is Osburn's 2026 list price for the wood stove alone. Options sold on this page add to it; those marked on request we add to your order by hand.

Faceplate and trim

Fresh air

Other options

Chimney requirements from the specification sheet

A 6-inch chimney flue system is required. New factory-built chimney systems must comply with UL 103 HT 2100 °F (USA) or ULC S629 (Canada) and be suitable for solid fuel. The minimum chimney height is 12 feet measured from the stove to the chimney cap outside the house; 15 feet or higher is ideal for optimal draft. The chimney must extend at least 3 feet above the highest point of contact with the roof and at least 2 feet above any roof line or obstacle within 10 feet horizontally.

An 8-inch chimney is not recommended — EPA/CSA B415.1-10 certified heaters function best on a 6-inch chimney. If your existing chimney is 8 inches, install a 6-inch stainless steel liner inside it. Masonry chimneys require a stainless steel liner sized to match the 6-inch flue outlet.

Outside air

A fresh-air intake is required for mobile-home installations and strongly recommended for tight new-construction homes with mechanical ventilation, for homes with powerful range hoods or other mechanical exhaust appliances, and where local code requires it. A 5-inch insulated flex pipe and 5-inch fresh air intake register with airtight damper are sold separately for buyers configuring outside-air installations. A smoke detector and carbon monoxide detector are required in the room where the stove is installed.

Codes and approvals

Code compliance for any specific installation is determined by the local Authority Having Jurisdiction. Manufacturer listings cover what the stove is approved for; the AHJ approves what is permitted at your address. A WETT (Canada), NFI, or CSIA (USA) certified installer is strongly recommended and frequently required by code, permit, or insurance. EPA-certified wood heaters are mandatory in the United States, British Columbia, Ontario, Quebec, Nova Scotia, New Brunswick, and Newfoundland — confirm local requirements before purchasing, particularly in EPA non-attainment counties and in HOA jurisdictions where new wood-burning installs may be restricted.

California Proposition 65

This product can expose you to chemicals including carbon monoxide, which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to www.P65warnings.ca.gov.

• Matrix freestanding wood stove with 3/16" steel body, 5/16" steel top, welded steel firebox, refractory brick lining, stainless-steel secondary-air tube assembly, and cast-iron-framed single ceramic glass viewing door with reversible swing
• Configured at order with required side panel selection — Black Steel (default) or Soapstone (premium upgrade)
• Configured at order with required top panel selection — Black Steel (default) or Soapstone (upgrade)
• 130 CFM blower with heat sensor for automatic cycling
• C-Cast or equivalent baffle
• Ash pan with removable cover
• Owner's installation and operation manual and product documentation

Sold separately

• Code-compliant 6-inch Class A insulated chimney system — listed factory-built chimney complying with UL 103 HT (USA) or ULC S629 (Canada); required venting components are sold separately
• Stove pipe connector between the stove and chimney — single-wall or double-wall (double-wall recommended for closer-to-wall installations per the clearance table)
• Hearth pad or floor protector sized to manual specifications — manufacturer options include Modular Floor Protection System 54" × 46 3/4" (SBI AC02711), Modular Hearth Pad System 60" corner (SBI AC02787), Tempered Glass Hearth Pad 54" × 46 3/4" (SBI AC02703), Tinted Tempered Glass Hearth Pad 54" × 46 3/4" (SBI AC02758)
• Optional Rigid Firescreen (SBI AC01315) — for occasional door-open viewing where local code permits; never leave the stove unattended
• Optional 5" Fresh Air Intake Register with Airtight Damper (SBI AC01349), 5" × 4' Insulated Flex Pipe for fresh air intake (SBI AC02090), and 5" Air Intake Termination with Clamps (SBI AC01297) — required for mobile-home installations, recommended for tight homes
• Optional Certified Modular Heat Shield System 53" × 58 1/2" (SBI AC02762) and Heat Shield Extension (SBI AC02713) — for installations requiring additional wall shielding
• Digital moisture reader and probe thermometer — strongly recommended; not optional in practice
• Glass cleaner (SBI AC07825), dry cleaning pad (SBI AC07824), gloves (SBI AC07820 or AC07822), fire starters — consumables for normal operation and maintenance
• Installation by an authorized qualified technician (WETT, NFI, or CSIA certified) — required for warranty coverage and often required by code, permit, or insurance

• Check with your building department and insurer: wood appliances need a permit in most places and an inspection after installation.
• The chimney is the other half of the system. It is sold separately and quoted from your installer's plan.
• Clearances and floor protection come from the manual and depend on the pipe and shields you choose. Send us your plan and we will check it.
• Burn seasoned wood below 20 percent moisture. Wet wood is the cause of most complaints about any wood stove.
• Special-order goods ship by freight.

The 75,000 BTU/hr maximum is a peak rating, transient, achieved on dry cordwood at loading density of 15–20 lb/ft³ and reload intervals of 60–120 minutes. The figure that matters for daily life is the sustained output across a full burn cycle, which lands in the 14,200–44,500 BTU/hr band per the CSA B415.1-10 stack-loss method.

A realistic operating day, primary-heat use, cold climate: morning reload at sunrise produces a fast 60–90 minute warm-up and several hours of high output; mid-afternoon reload sustains heat through evening; a full pack at bedtime gives 6–7 hours of useful heat overnight, with the stove at coals by morning. In practical use with seasoned oak, maple, or hickory, expect 6–8 hours of useful heat from a packed load. With birch, pine, or softer wood, expect 4–5 hours.

The 72% HHV average efficiency and EPA 2020 cordwood certification place the Matrix in the higher efficiency band of the Osburn freestanding lineup. The 79% LHV optimum at the specific test burn rate is competitive with the Inspire 2000 and higher than the standard Osburn 2000. HHV is the federal standard.

The included 130 CFM blower with heat sensor is a meaningful differentiator from the Inspire 2000, which sells the same blower kit separately. The heat sensor cycles the blower automatically — starts at approximately 115 °F at the back heat shield, stops below 100 °F — so the buyer doesn't have to manage it manually. Air is distributed from behind the firebox out through the rear shield and into the room. The blower extends heat distribution into the room and adjacent spaces.

The 20-inch maximum log capacity is generous for a 2.4 ft³ firebox. Most firewood suppliers cut to 16 inches, which is also the manufacturer's recommended length. Loading is over width (east-west) per the manufacturer specification.

The soapstone side panel option meaningfully affects the appliance's thermal behavior. Steel panels conduct heat quickly — the stove warms the room fast and cools fast when the fire dies down. Soapstone panels absorb heat during high burns and radiate it during low burns, smoothing temperature swings in the room. The trade-off is purchase price and shipping weight; soapstone adds substantially to both.

The heavy-gauge construction (3/16" body, 5/16" top) is meaningfully stronger than typical wood stoves at this output tier. Heavier steel resists warping over years of high-temperature cycles and extends the practical service life of the appliance. The trade-off is shipping weight (506 lb base, more with soapstone panels) and the multi-person handling required at delivery and installation.

Air-wash glass on the single door stays largely clear during proper hot burns. At low burn rates with marginally seasoned wood, the glass will tar. This is universal to non-catalytic tube appliances, not specific to Osburn, and it is the strongest signal that your wood is too wet or your burn is too cool.

Trade-offs to know

Two buyer-configurable choices at order — side panels and top panel. Side panels (Black Steel default or Soapstone premium upgrade) and top panel (Black Steel default or Soapstone upgrade). The panel choice substantially changes the appliance's visual character and thermal behavior, and is not field-swappable after order without purchasing the alternate kit separately. Walk through the panel combinations with the room aesthetic in mind before ordering.

Blower is essential to the design. Unlike some freestanding wood stoves where the blower is an optional add-on, the Matrix is designed around the included 130 CFM blower with heat sensor. Without power to run the blower, the stove still radiates heat but the convection distribution drops substantially. Owners in outage-prone regions should plan for a battery backup, UPS, or generator if the stove is the primary heat source.

Tight door opening height. 8 3/4" door opening height is on the lower end for a 2.4 ft³ firebox. Size firewood splits accordingly — narrow east-west loading is the practical loading approach. Multiple owner reviews note the door opens 90 degrees rather than swinging fully out, which can make loading larger logs into the back of the firebox feel cramped.

Contemporary styling polarizes. The Matrix leans contemporary — pedestal mount, optional soapstone panels, European-inspired proportions. Buyers who want the traditional cast-iron pedestal wood-stove look will not be happy with this appliance. Visit a dealer with the stove on display before committing.

Soapstone panel installation can be finicky. One owner reported the soapstone side panels could not be installed due to interference with the door latch bolts; the steel side panels (which are thinner) might fit better in some installations. If you order soapstone panels, confirm installation fit with your dealer or installer before final purchase.

The Osburn 2000 may be the better value for traditional buyers. The Osburn 2000 wood stove has the same firebox tier, same EPA 2020 cordwood certification, includes a 130 CFM blower as standard, and carries a lower starting price than the Matrix. The Matrix's premium pays for contemporary styling, soapstone panel options, and the heavier-gauge top steel — but in terms of pure heating capability and value, the Osburn 2000 may be the better buy. Choose between them based on aesthetic preference and feature priorities, not BTU output.

Non-catalytic burn time. A non-cat appliance gives you simpler operation and no catalyst to replace, but you pay for it with shorter burns. The 8-hour maximum claim is achievable on a packed load of dense hardwood with the air shut down hard; useful heat through that cycle is realistically 6–7 hours. For 12+ hour overnight burns with steady output, a catalytic or hybrid stove is the right tool.

506 lb base shipping weight. Heavy enough to require multi-person handling at delivery; the curb-to-hearth move is not a one- or two-person job. Soapstone panels add additional weight — confirm floor support and hearth pad load rating before installation.

Living with it

First burns. The first three to six fires release paint VOCs as the high-temperature stove paint cures. The smell can be strong during paint cure-in. Ventilate the room well, avoid prolonged exposure, and expect the odor to disappear after the first several hot burns.

Lighting. The manual describes top-down lighting as an effective method — largest splits on the bottom, smaller above, kindling on top, fire starter at the very top, light the top. Cleaner ignition, less smoke, faster to operating temperature.

Air control. Full open at light-off, then gradually closed only after the load is fully engaged and stable secondary flames are established. A flue thermometer is strongly recommended — without one, you are guessing at draft, burn rate, and overfire risk. The manual specifies keeping flue temperature in the comfort zone of 250–475 °F at steady state, with 700 °F acceptable transiently during start-up. Do not maintain excessive temperatures over long periods.

Reload cadence. 3–5 hours between reloads in active high-output use; 6–7 hours for a final overnight pack with the air shut hard. Open the air, wait 30 seconds, open the door slowly to avoid spilling smoke into the room. Place at least three pieces on the fire at a time so that the heat radiated from one piece helps ignite the pieces next to it. Loading is over width (east-west) per the manufacturer's loading specification.

Blower management. The blower starts automatically via the heat sensor when the stove reaches operating temperature, typically about an hour after cold start. The heat sensor handles on/off; speed control is via the rheostat. Turn the blower OFF before opening the door fully — otherwise it can blow ash out of the firebox into the room.

Ash pan. Ash drawer with removable cover at the base of the appliance simplifies ash removal. One owner review noted the plug-style cover needs to be removed before raking ash to the pan, which can be inconvenient. Empty ash into a metal container with a lid and store outside, away from combustible materials, for at least 48 hours before disposal — embers can remain hot for days.

Glass cleaning. Damp newspaper dipped in cold ash, or a dedicated ceramic-glass cleaner. Daily wipe during low-burn weather; weekly during high-burn. Black streaks at the lower edge mean wet wood; black uniformly across the glass means burns are running too cool. Do not clean the glass when the stove is hot.

Door alignment and gasket replacement. The door gasket needs replacement when the paper-strip test fails: close the door on a strip of paper and try to pull it out; firm resistance means the gasket is sealing, easy pull means it's time to replace. Plan on gasket replacement every 3–5 seasons in regular use. Replacement gasket kits are available through the SBI parts network.

Warranty

A one-time replacement limit applies to all parts with lifetime coverage. Warranty is void if the unit is used to burn anything other than seasoned cordwood, or if it is not operated according to the owner's manual. Damage caused by misuse, improper installation, lack of maintenance, overfiring, downdrafts, venting problems, or under-estimated heating area is not covered. Improper installation by anyone other than an authorized qualified technician voids the warranty.

Warranty claims are made through your Osburn dealer and remain subject to SBI/Osburn inspection, approval, and the current written warranty. Kaminos is the retailer for this stove and supports buyers through purchase; final warranty approval rests with SBI as the manufacturer. SBI's parts network is well-stocked — replacement bricks, baffle, secondary tubes, glass, gaskets, blower, heat sensor, panels, and venting components are openly available at fair prices through multiple parts vendors.

Osburn may require photos or returned parts to support a claim; repair work covered by warranty requires prior manufacturer approval.

Coverage details can change by component and warranty revision; the current Osburn warranty controls.

• Osburn document list for the Osburn Matrix (OB02032): installation and owner's manual, safety notices
• Osburn wood products brochure, USA edition, with dimension drawings (PDF)
• Osburn limited lifetime warranty
• EPA test reports
• Replacement parts