Osburn Matrix 2700 Wood-Burning Fireplace Insert
Osburn Matrix 2700 Wood Insert OB02700 – High-Efficiency Non-Catalytic Wood-Burning Insert
The Osburn Matrix 2700 Wood Insert OB02700 is a non-catalytic wood-burning fireplace insert designed to convert an existing masonry fireplace into an efficient residential zone-heating system. It is recommended for heating areas from 750 to 2,000 sq. ft., delivers up to 80,000 BTU/h with dry cordwood, offers up to an 8-hour maximum burn time, and includes a blower rated at up to 176 CFM.
Model
OB02700
Heating Area
750–2,000 sq. ft.
Max Output
80,000 BTU/h
Firebox
2.5 cu. ft.
Max Burn Time
8 Hours
Max Log Length
20"
Blower
Up to 176 CFM
EPA Emissions
1.14 g/h
Important: Required Finishing Components Are Sold Separately
A door overlay is required to complete the Osburn Matrix 2700. Product imagery may also show a faceplate, faceplate trim, and door overlay that are not included. Confirm all required finishing components before ordering.
Efficient Wood Heating for an Existing Masonry Fireplace
The Matrix 2700 is designed for homeowners who want to upgrade an existing masonry fireplace into a more efficient wood-burning zone heater while retaining a traditional fireplace-style installation.
Its 2.5 cu. ft. firebox combines non-catalytic combustion with a stainless-steel secondary-air system, moulded refractory panels, C-Cast baffle, ceramic-glass viewing door, and included 176 CFM blower.
The result is a fireplace insert built around useful heat output, a broad view of the fire, and EPA 2020-compliant combustion performance.
EPA 2020 compliant: The Matrix 2700 has a certified average particulate emissions rate of 1.14 g/h.
Osburn Matrix 2700 OB02700 at a Glance
Product Type
Wood-Burning Fireplace Insert
Heating Area
750–2,000 sq. ft.
Maximum Output
80,000 BTU/h
Firebox Volume
2.5 cu. ft.
Maximum Burn Time
Up to 8 Hours
Blower
Included, Up to 176 CFM
Is the Osburn Matrix 2700 Right for Your Fireplace?
Best For
- Existing masonry fireplaces suitable for a wood-burning insert.
- Homes requiring recommended zone heating from 750–2,000 sq. ft.
- Buyers wanting non-catalytic combustion.
- Installations using a continuous listed stainless-steel chimney liner.
- Buyers wanting an included blower rated up to 176 CFM.
- Users wanting capacity for logs up to 20 inches long.
- Homeowners wanting a large ceramic-glass viewing area.
- EPA 2020-compliant wood-heating applications.
Consider Another Product If
- You need a mobile-home-approved fireplace insert.
- Your masonry fireplace does not meet the minimum opening requirements.
- Your chimney cannot accommodate the required continuous liner system.
- You cannot meet required combustible clearances.
- You do not want to purchase the required door overlay separately.
- You need a freestanding wood stove rather than a fireplace insert.
Heating Performance & Efficiency
| Recommended Heating Area |
750–2,000 sq. ft. |
| Maximum Heat Output |
80,000 BTU/h (23.4 kW) |
| Overall Heat Output Rate |
14,200–48,200 BTU/h (4.16–14.13 kW) |
| Maximum Burn Time |
Up to 8 Hours |
| Average Overall Efficiency |
68% HHV / 73% LHV |
| Optimum Overall Efficiency |
74% |
| Optimum Heat Transfer Efficiency |
71% |
| Average Particulate Emissions |
1.14 g/h |
| Average CO |
53 g/h |
Performance distinction: The 80,000 BTU/h figure is the listed maximum output with dry cordwood. The separately listed overall heat-output range is 14,200–48,200 BTU/h.
Key Features
Non-Catalytic Combustion
Uses secondary combustion without a catalytic combustor.
80,000 BTU/h Maximum Output
Maximum listed heat output when burning dry cordwood under the specified conditions.
2.5 cu. ft. Firebox
Provides useful capacity for residential zone heating.
20" Maximum Log Length
Accepts logs up to 20 inches, with 16-inch cordwood recommended.
8-Hour Maximum Burn Time
Actual burn time varies with fuel, draft, load size, heat demand, and operating conditions.
176 CFM Blower
Included blower helps increase heated-air circulation in the room.
Large Ceramic Glass
Provides a wide view of the fire through a cast-iron-framed door.
Glass Air-Wash System
Helps reduce deposits on the viewing glass during proper operation.
Moulded Refractory Panels
Support high-temperature operation within the firebox.
Firebox & Non-Catalytic Combustion
| Fuel Type |
Dry Cordwood |
| Overall Firebox Volume |
2.5 cu. ft. |
| EPA Loading Volume |
1.69 cu. ft. |
| Recommended Log Length |
16" |
| Maximum Log Length |
20" |
| Log Orientation |
East-West / Across the Width |
| Recommended Fuel Moisture |
Approximately 15%–20% |
| Baffle Material |
C-Cast |
| Moulded Refractory Panels |
Yes |
| Secondary-Air System |
Stainless Steel |
Fuel quality matters: Properly seasoned cordwood in the approximately 15%–20% moisture range supports more efficient combustion and cleaner operation.
Large Ceramic-Glass Viewing Area
The Matrix 2700 uses a single ceramic-glass door with a cast-iron frame and an integrated air-wash system.
| Opening |
Width |
Height |
| Glass Surface |
24 3/8" |
12 5/8" |
| Door Opening |
25 3/8" |
10 1/2" |
Overall & Firebox Dimensions
Overall Dimensions
-
Width: 43 5/8"
-
Height: 30 1/8"
-
Depth: 27 1/4"
Firebox Dimensions
-
Width: 22 5/8"
-
Height: 12 3/8"
-
Depth: 12 7/8"
Minimum Masonry Fireplace Opening
Before purchasing the Matrix 2700, verify that the existing masonry fireplace meets at least the manufacturer's minimum opening dimensions.
| Minimum Width |
31 3/4" |
| Minimum Height |
27 1/8" |
| Minimum Depth |
22 1/8" |
Fresh-air intake note: If a fresh-air intake is required, the manufacturer recommends adding at least 4 inches to the minimum fireplace-opening width.
Projection-kit note: Projection-kit configurations can affect required installation depth. Verify the final installation configuration before ordering or construction.
Chimney & Venting Requirements
Liner Standards
ULC S635, CAN/ULC-S640, UL 1777
Minimum System Height
15 ft.
Continuous Liner
Required from insert to top of chimney
Continuous liner required: The manufacturer's manual specifies a continuous chimney liner extending from the insert to the top of the chimney.
Required Accessories & Finishing Components
Required Door Overlay
- Black cast-iron door overlay
- Brushed-nickel cast-iron door overlay
Faceplate
Product imagery may show a faceplate that is not included. Confirm the correct faceplate for the selected installation.
Faceplate Trim
Product imagery may also show faceplate trim that is not included. Verify all required finishing components before ordering.
Required to complete the unit: A compatible door overlay must be purchased separately. Do not assume components shown in product imagery are included.
Construction & Standard Equipment
Body Material
Carbon Steel
Body Steel Thickness
3/16"
Top Steel Thickness
3/16"
Door
Single Ceramic-Glass Door with Cast-Iron Frame
Blower
Included, Up to 176 CFM
Refractory Panels
Moulded Refractory
Adjustable Legs
Threaded Adjustable Legs
Minimum Clearances to Combustibles
The following minimum clearances are listed for the installation configuration shown in the manufacturer documentation.
| Adjacent Combustible Side Wall |
19" |
| Combustible Side Surround |
9 1/2" |
| Combustible Top Surround |
12" |
| Combustible Mantel Shelf Above Faceplate |
12" |
| Top Clearance from Appliance Platform |
84" |
| Floor Protection in Front – USA |
16" from door opening for applicable raised-hearth configurations |
Certification label priority: The certification label affixed to the appliance overrides information published in manuals, catalogs, flyers, magazines, or websites.
Certifications & Standards
EPA Certification
EPA 2020 Cordwood Compliant
Particulate Emissions
1.14 g/h
Canadian Emissions
CSA B415.1-10
U.S. Safety
UL 1482 and UL 737
Testing
Safety Tested by an Accredited Laboratory
Complete Osburn Matrix 2700 OB02700 Specifications
| Brand |
Osburn |
| Model |
OB02700 |
| Product Type |
Wood-Burning Fireplace Insert |
| Fuel Type |
Dry Cordwood |
| Combustion Technology |
Non-Catalytic |
| Recommended Heating Area |
750–2,000 sq. ft. |
| Maximum Heat Output |
80,000 BTU/h (23.4 kW) |
| Overall Heat Output Rate |
14,200–48,200 BTU/h (4.16–14.13 kW) |
| Maximum Burn Time |
Up to 8 Hours |
| Overall Firebox Volume |
2.5 cu. ft. |
| EPA Loading Volume |
1.69 cu. ft. |
| Recommended Log Length |
16" |
| Maximum Log Length |
20" |
| Log Orientation |
East-West |
| Average Overall Efficiency |
68% HHV / 73% LHV |
| Optimum Overall Efficiency |
74% |
| Optimum Heat Transfer Efficiency |
71% |
| Average Particulate Emissions |
1.14 g/h |
| Average CO |
53 g/h |
| Blower |
Included – Up to 176 CFM |
| Overall Width |
43 5/8" |
| Overall Height |
30 1/8" |
| Overall Depth |
27 1/4" |
| Glass Surface |
24 3/8" W × 12 5/8" H |
| Door Opening |
25 3/8" W × 10 1/2" H |
| Firebox Dimensions |
22 5/8" W × 12 3/8" H × 12 7/8" D |
| Minimum Fireplace Opening |
31 3/4" W × 27 1/8" H × 22 1/8" D |
| Flue Outlet Diameter |
6" |
| Recommended Connector Diameter |
6" |
| Liner Standards |
ULC S635, CAN/ULC-S640, UL 1777 |
| Minimum System Height |
15 ft. |
| Continuous Chimney Liner |
Required |
| Body Material |
Carbon Steel |
| Body Steel Thickness |
3/16" |
| Top Steel Thickness |
3/16" |
| Door Type |
Single Ceramic-Glass Door with Cast-Iron Frame |
| Glass Air-Wash System |
Yes |
| Baffle Material |
C-Cast |
| Moulded Refractory Panels |
Yes |
| Secondary-Air System |
Stainless Steel |
| Adjustable Threaded Legs |
Yes |
| Mobile Home Installation |
Not Approved |
| USA Emissions Standard |
EPA |
| Canadian Emissions Standard |
CSA B415.1-10 |
| USA Safety Standards |
UL 1482, UL 737 |
| Canadian Safety Standard |
ULC S628 |
| Shipping Weight |
535 lb. (243 kg) |
| Warranty |
Limited Lifetime |
Flame Authority Expert Recommendation
Choose the Osburn Matrix 2700 OB02700 when you want to convert a compatible masonry fireplace into a substantial non-catalytic wood-burning zone heater with a large viewing area and strong blower-assisted heat circulation.
Its 750–2,000 sq. ft. recommended heating range, 80,000 BTU/h maximum output, 2.5 cu. ft. firebox, 20" maximum log capacity, 8-hour maximum burn time, 1.14 g/h particulate emissions rate, ceramic-glass viewing area, moulded refractory panels, stainless-steel secondary-air system, and included 176 CFM blower make it a strong fit for qualifying residential installations.
The most important purchasing step is verifying the complete fireplace and chimney system. Confirm the 31 3/4" × 27 1/8" × 22 1/8" minimum masonry opening, 6" liner connection, 15 ft. minimum system height, required combustible clearances, floor protection, required door overlay, and any faceplate or trim components before ordering.
Also Available with Liner Kit
Official Manufacturer Resources
Installation & Owner's Manual
Manufacturer installation, operation, fireplace-opening, chimney-liner, clearance, fresh-air, maintenance, and safety information for the Matrix 2700.
Osburn Matrix 2700 Specification Sheet
Manufacturer specifications covering heating performance, emissions, dimensions, construction, blower, firebox, and technical data.
Osburn Matrix 2700 OB02700 FAQs
How much space can the Osburn Matrix 2700 heat?
The Matrix 2700 is recommended for heating areas from 750 to 2,000 sq. ft. Actual heating performance depends on climate, home layout, chimney draft, heat loss, fuel quality, and installation conditions.
How many BTUs does the Osburn Matrix 2700 produce?
The Matrix 2700 has a maximum heat output of 80,000 BTU/h with dry cordwood. Its separately listed overall heat-output rate is 14,200–48,200 BTU/h.
What size fireplace opening does the Matrix 2700 require?
The minimum masonry fireplace opening is 31 3/4" wide × 27 1/8" high × 22 1/8" deep.
Does a fresh-air intake affect the minimum opening?
Yes. If a fresh-air intake is required, the manufacturer recommends adding at least 4 inches to the minimum fireplace-opening width.
Is the door overlay included?
No. A black or brushed-nickel cast-iron door overlay is required to complete the unit and must be purchased separately.
Are the faceplate and faceplate trim included?
Product imagery may show a faceplate and faceplate trim that are not included. Verify all required finishing components for the selected configuration before ordering.
What size logs fit in the Matrix 2700?
The Matrix 2700 accepts logs up to 20 inches, while 16-inch dry cordwood is recommended.
How are logs loaded in the firebox?
The firebox is designed for east-west loading, meaning the logs are positioned across the width of the firebox.
Does the Matrix 2700 include a blower?
Yes. The Matrix 2700 includes a blower rated at up to 176 CFM.
How long can the Matrix 2700 burn?
The manufacturer lists a maximum burn time of up to 8 hours. Actual burn time varies with fuel load, wood species, moisture content, heat demand, chimney draft, and operating conditions.
Is the Matrix 2700 catalytic or non-catalytic?
The Matrix 2700 uses non-catalytic combustion technology with stainless-steel secondary-air tubes and a C-Cast baffle.
Is the Matrix 2700 EPA 2020 compliant?
Yes. The Matrix 2700 is EPA 2020 cordwood compliant and has a certified average particulate emissions rate of 1.14 g/h.
What size chimney liner does the Matrix 2700 use?
The insert has a 6-inch flue outlet and is designed for a listed stainless-steel chimney liner meeting the applicable ULC S635, CAN/ULC-S640, or UL 1777 requirements.
Does the Matrix 2700 require a continuous chimney liner?
Yes. The supplied installation information specifies a continuous chimney liner extending from the insert to the top of the chimney.
What is the minimum chimney-system height?
The supplied product information specifies a 15-foot minimum total system height.
Can the Matrix 2700 be installed in a mobile home?
No. The Osburn Matrix 2700 is not approved for mobile-home installation.
What are the overall dimensions?
The Matrix 2700 measures approximately 43 5/8" wide × 30 1/8" high × 27 1/4" deep.
How large is the viewing glass?
The ceramic-glass viewing surface measures approximately 24 3/8" wide × 12 5/8" high.
What is the efficiency of the Matrix 2700?
The manufacturer lists 68% average overall efficiency HHV, 73% LHV, and 74% optimum overall efficiency.
What moisture content is recommended for firewood?
The supplied information recommends approximately 15%–20% wood moisture content for efficient combustion.
What should I verify before ordering the Matrix 2700?
Confirm the minimum masonry fireplace opening, 6-inch continuous liner system, 15-foot minimum system height, required combustible clearances, floor protection, required door overlay, and any required faceplate or trim components for the final installation.
Before You Order
Confirm Before Purchase
- You specifically need the Osburn Matrix 2700 OB02700.
- Your masonry fireplace meets the 31 3/4" W × 27 1/8" H × 22 1/8" D minimum opening.
- Your chimney can accommodate a continuous listed liner from the insert to the chimney top.
- Your installation can meet the 15-foot minimum system-height requirement.
- You can maintain the required combustible clearances.
- You have selected the required black or brushed-nickel door overlay.
- You have verified whether a faceplate and faceplate trim are required for your selected configuration.
- You have accounted for any fresh-air or projection-kit effects on installation dimensions.
- You understand that the insert is not approved for mobile-home installation.
- You plan to burn properly seasoned natural cordwood.
Do Not Assume
- That the door overlay is included.
- That the faceplate or faceplate trim shown in product imagery is included.
- That appliance dimensions and minimum masonry-opening dimensions are interchangeable.
- That the 80,000 BTU maximum figure is the same as the overall tested heat-output range.
- That a partial chimney liner is sufficient.
- That the insert is approved for a mobile home.
- That a fresh-air intake has no effect on required fireplace-opening width.
- That published website clearances override the appliance certification label.
Final planning check: Use the Matrix 2700 Installation & Owner's Manual, Specification Sheet, and appliance certification label to verify masonry-fireplace fit, chimney liner, clearances, floor protection, fresh-air requirements, required finishing components, and final installation before ordering.
