Osburn Matrix-I Wood-Burning Fireplace Insert – OB02028
Modern High-Efficiency Wood Heat for Masonry Fireplaces
The Osburn Matrix-I wood-burning fireplace insert delivers powerful EPA 2020 certified performance with sleek contemporary styling and up to 79% optimal efficiency.
Key Features
- EPA 2020 Certified Wood-Burning Fireplace Insert
- Heats 500 – 2,100 sq. ft.
- 2.3 g/h Low Emissions
- Large 36-1/8" x 25-1/8" Faceplate for Full Masonry Coverage
- 79% Optimal Overall Efficiency
- 75,000 BTU Maximum Output
- Premium 90 CFM Blower Included
- Heavy-Duty Steel Construction
- Limited Lifetime Warranty
Discover the Additional Qualities of the Osburn Matrix Wood Insert
The Matrix wood insert will seduce you with an average particulate emission rate of 2.3 g/h and an optimal efficiency of 79%. The latest modifications made to this firebox align with strict 2020 industry standards.
Although it retains a bold, massive yet sleek style, the door mechanism has been redesigned for improved functionality and durability. Always the same legendary Osburn quality.
Important Installation Notice:
Adding a set of intermediate trim panels may be required to complete your masonry hearth installation.
Projection Kit Notice:
To install the optional projection kit AC01323, you must also purchase one of the following faceplate backing plate kits separately:
These backing plates are required to properly secure the projection kit.
Product Features
EPA 2020 Certified Clean Burning Performance
This EPA-approved wood fireplace insert meets 2020 cordwood standards with emissions of only 2.3 grams per hour, delivering environmentally responsible heating and improved indoor air quality.
Powerful Heating Capacity Up to 2,100 Sq. Ft.
Designed for zone heating, the Matrix-I efficiently heats medium to large living areas, making it ideal for upgrading an existing masonry fireplace.
High Efficiency Non-Catalytic Combustion
Advanced non-catalytic combustion technology maximizes burn efficiency while minimizing creosote buildup. Achieve:
- 72% HHV efficiency
- 77% LHV efficiency
- 79% optimal efficiency
Heavy-Duty Steel Firebox Construction
Built with:
- 3/16" steel body
- 5/16" reinforced steel top
- Refractory brick lining
- C-Cast baffle system
This durable construction ensures long-term reliability and superior heat retention.
Large Viewing Area with Air-Wash System
The ceramic glass viewing window (19 5/8" W x 11 7/8" H) provides a beautiful view of the fire, while the integrated air-wash system helps keep the glass cleaner.
Included Premium 90 CFM Blower
The factory-installed blower improves heat circulation and overall performance, increasing usable heat output into your living space.
Optimized for 16" Firewood
Designed for east-west loading with recommended 16" logs (up to 20" maximum), improving combustion consistency and ease of use.
⚠️ Safety Warning
Warning: Wood-burning inserts must only be installed inside an existing masonry fireplace and never in a wooden or combustible structure.
Always consult local building codes and a qualified professional installer.
Product Specifications
Appliance Performance
| Specification |
Value |
| Fuel Type |
Dry cordwood (16" recommended) |
| Recommended Heating Area |
500 – 2,100 sq. ft. |
| Overall Firebox Volume |
2.4 ft³ |
| EPA Loading Volume |
1.95 ft³ |
| Maximum Burn Time |
Up to 8 hours* |
| Maximum Heat Output |
75,000 BTU/h (22.0 kW) |
| Heat Output Range |
14,200 – 44,500 BTU/h |
| Average Overall Efficiency |
72% (HHV) / 77% (LHV) |
| Optimal Overall Efficiency |
79% |
| Optimal Heat Transfer Efficiency |
76% |
| Average Particulate Emissions |
2.3 g/h |
| Average CO |
69 g/h |
Construction & Design
| Specification |
Value |
| Combustion Technology |
Non-Catalytic |
| Maximum Log Length |
20" |
| Log Orientation |
East-West (Loading Over Width) |
| Firebox Lining |
Refractory Brick |
| Baffle Type |
C-Cast or Equivalent |
| Secondary Air System |
Stainless Steel |
| Steel Thickness (Body) |
3/16" |
| Steel Thickness (Top) |
5/16" |
| Door Type |
Single, Glass with Cast Iron Frame |
| Glass Type |
Ceramic Glass |
| Glass Dimensions |
19 5/8" x 11 7/8" |
| Blower |
Included – 90 CFM |
| Shipping Weight |
491 lbs (223 kg) |
| Warranty |
Limited Lifetime |
Dimensions
| Dimension |
Measurement |
| Overall Height |
25 1/8" |
| Overall Width |
36 1/8" |
| Overall Depth |
23 1/8" |
| Door Opening (H x W) |
8 3/4" x 17 1/2" |
| Firebox Dimensions (H x W x D) |
11 7/8" x 21" x 16 3/4" |
Standard Faceplate Dimensions
| Faceplate Dimension |
Measurement |
| Faceplate Width |
36 1/8" |
| Faceplate Height |
25 1/8" |
Minimum Fireplace Opening Requirements
| Requirement |
Measurement |
| Height |
23 3/8" |
| Width |
28 7/8" |
| Depth |
19 5/8" |
Venting Requirements
| Specification |
Value |
| Chimney Diameter |
6" |
| Flue Outlet Diameter |
6" |
| Approved Chimney Types |
ULC-S635, CAN/ULC-S640, UL1777 |
| Minimum Chimney Height |
12 ft |
Certifications & Standards
| Category |
Standard |
| USA Emissions |
EPA / ASTM WK47329 |
| Canadian Emissions |
CSA B415.1-10 |
| USA Safety |
UL 1482, UL 737 |
| Canadian Safety |
ULC S628 |
| Listing |
Tested by Accredited Laboratory (CAN/USA) |
Minimum Clearances to Combustibles
| Clearance |
Canada |
USA |
| Side Mantel to Unit |
9" |
9" |
| Top Mantel to Unit |
27" |
27" |
| Side Wall to Unit |
16" |
16" |
| Floor Protection (Front) |
18" |
16" |
| Top of Insert to Shelf |
27" |
27" |
Warranty
Warranty Coverage – Osburn Wood Stoves & Inserts
Osburn wood-burning appliances are backed by a limited lifetime manufacturer’s warranty that covers specific components for varying durations. Coverage applies to the original purchaser and is subject to proper installation and use per the owner’s manual.
Warranty Coverage:
| Component / Description |
Parts Coverage |
Labor Coverage |
| Combustion chamber (welds only) and cast-iron door frame |
Lifetime* |
5 years |
| Ceramic glass**, plating (manufacturing defect**), convector air-mate |
Lifetime* |
N/A |
| Surrounds, heat shields, ash drawer, steel legs, pedestal, trims (aluminum extrusions), vermiculite, C-Cast or equivalent baffle**, secondary air tubes**, removable stainless steel combustion chamber, deflectors, and supports |
7 years* |
N/A |
| Handle assembly, glass retainers, and air control mechanism |
5 years |
3 years |
| Removable carbon steel combustion chamber components |
5 years |
N/A |
| Standard and optional blower, heat sensors, switches, rheostat, wiring, and electronics |
2 years |
1 year |
| Paint (peeling**), gaskets, insulation, ceramic fiber blankets, refractory bricks (fireplace only*) and other options |
1 year |
N/A |
| All replacement parts supplied under warranty |
90 days |
N/A |
Important Warranty Notes
- Lifetime coverage is limited to one replacement.
- Photo documentation may be required to validate claims.
- Warranty applies to manufacturing defects only.
- Damage caused by improper installation, misuse, abuse, over-firing, or failure to follow installation instructions is not covered.
- Labor coverage applies only where explicitly stated.
- Warranty terms are subject to the manufacturer’s full warranty policy.
What This Means for Homeowners
Osburn’s warranty reflects long-term confidence in the structural components that matter most—while clearly defining wear items and electronics that naturally experience use-related aging.
For full warranty eligibility:
- Installation must comply with the owner’s manual
- Appliance must be operated using approved fuels
- Routine maintenance must be performed as recommended
About the Manufacturer
Who Is Osburn?
Osburn is a Canadian manufacturer specializing in high-efficiency wood stoves and zero-clearance wood fireplaces designed for real-world home heating. The brand is widely recognized in North America for producing EPA-certified wood-burning appliances that combine strong heat output, clean combustion, and durable construction.
Founded in Québec, Canada, Osburn has built its reputation around performance-driven wood heating, offering products capable of heating entire homes while meeting modern emissions and safety standards.
What Is Osburn Known For?
Osburn is best known for:
- Wood stoves & inserts with high BTU output
- EPA 2020–certified wood-burning technology
- Non-catalytic combustion systems that simplify operation
- Large fireboxes and extended burn times
- Canadian manufacturing and engineering standards
Osburn stoves & inserts are designed to deliver both ambiance and functional heat, making them suitable for homeowners seeking a real wood fire that also contributes meaningful warmth.
Where Are Osburn Wood Stoves Made?
Osburn fireplaces and wood stoves are designed and manufactured in Canada. The brand operates under Stove Builder International (SBI), one of North America’s largest and most established hearth appliance manufacturers.
This manufacturing structure allows Osburn to maintain:
- Consistent quality control
- In-house testing and certification
- Long-term parts availability
- Proven reliability across product lines
Are Osburn Products EPA Certified?
Yes. Osburn fireplaces and stoves meet EPA 2020 emissions standards, making them compliant for installation in the United States. These certifications ensure:
- Lower particulate emissions
- Improved fuel efficiency
- Cleaner-burning fires compared to older wood fireplaces
Many Osburn models are also certified to UL and ULC safety standards for use in both the U.S. and Canada.
Can Osburn Fireplaces Be Used for Heating a Home?
Yes. Many Osburn wood stoves can heat 750 to over 2,000 square feet, depending on the model, home layout, and installation. While often installed for ambiance, Osburn stoves are frequently used as:
- Primary heat sources in open-concept homes
- Supplemental heating systems to reduce reliance on fossil fuels
- Emergency heat during power outages
Osburn’s Design Philosophy: Beyond Fire
Osburn describes its approach as “Beyond Fire”—a focus on preserving the authenticity of a real wood fire while reimagining it for modern homes. This philosophy emphasizes:
- Efficient combustion
- Clean-burning technology
- Durable materials
- Contemporary styling that fits today’s interiors
The result is a fireplace that delivers more than just appearance—it delivers dependable heat.
Why Homeowners Choose Osburn
Homeowners choose Osburn fireplaces because they offer:
- Canadian-made quality
- High heat output with clean emissions
- EPA 2020 compliance
- Zero-clearance installation flexibility
- Large glass viewing areas
- Long-term manufacturer support
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