Osburn Matrix Wood Insert
Important: the Osburn Matrix Wood Insert must be installed in a masonry fireplace with a listed liner. Osburn strictly forbids installing it in a factory-built (zero clearance) fireplace.
This updated version of the Matrix wood insert runs at an average particulate emission rate of 2.3 g/h with a 79% optimum overall efficiency, well inside the EPA 2020 standard. Although it retains a unique style that is both massive and sleek, the door mechanism has been reworked to make it more functional. Adding a set of intermediate trim panels may be required to complete your masonry hearth. Always the same legendary Osburn quality.
What’s not to like about the Osburn Matrix Wood Insert? This functional insert is made of cast iron, offering many years of durability. The traditional fireplace is being replaced with modern technology adding updated features for safer home heating and energy saving capabilities. The Osburn Matrix fireplace insert offers all of the protection you need from flying sparks and embers while keeping the cost of your energy bill down.
If you’re concerned about pollutants, the Osburn Matrix fireplace insert is a great choice. While a cozy fire can be charming, most of the smoke from a traditional fireplace doesn’t travel up the chimney — leaving the majority of smoke filling the surrounding area in the room. Installing the Osburn Matrix fireplace insert is one solution for a cleaner burning fire and a greener environment. Fireplace lovers can keep those home fires burning safely and environmentally friendly with the Osburn Matrix fireplace insert.
Will It Fit?
Measure your existing masonry fireplace opening before ordering. The Matrix Wood Insert needs at least:
| Minimum fireplace opening height |
23 3/8" |
| Minimum fireplace opening width |
28 7/8" |
| Minimum fireplace opening depth |
19 5/8" |
| Minimum depth with the projection kit fitted |
17 5/8" or 15 5/8" |
| If a fresh air intake is required |
Add at least 4" to the minimum opening width |
| Fireplace type |
Masonry only — factory-built fireplaces are not permitted |
| Chimney liner |
6" listed liner required, minimum 12' height |
The projection kit is worth knowing about if your hearth is shallow — it lets the unit sit further forward and brings the required opening depth down from 19 5/8" to as little as 15 5/8".
What to Order With It
The Matrix Wood Insert is complete as shipped; nothing else is required. Popular add-ons:
Optional:
Performance
| Maximum heat output (dry cordwood) |
75,000 BTU/h (22 kW) |
| Overall heat output range |
14,200 – 44,500 BTU/h (4.16 – 13.04 kW) |
| Recommended heating area |
500 – 2,100 sq ft (47 – 195 m²) |
| Average overall efficiency (HHV) |
72% |
| Average overall efficiency (LHV) |
77% |
| Optimum overall efficiency |
79% |
| Average particulate emissions |
2.3 g/h (EPA / CSA B415.1-10) |
| Average carbon monoxide |
69 g/h |
| Maximum burn time |
8 hours |
| Overall firebox volume |
2.4 cu ft (0.068 m³) |
| EPA loading volume |
1.95 cu ft (0.055 m³) |
| Recommended log length |
16" (406 mm), loaded east-west |
| Blower |
Included, up to 90 CFM |
Specifications
| Combustion technology |
Non-catalytic |
| High-efficiency certified appliance |
Yes, EPA 2020 approved |
| Fuel type |
Dry cordwood |
| Maximum log length |
20" |
| Log positioning |
Loading over width |
| Chimney diameter |
6" |
| Flue outlet diameter |
6" |
| Type of chimney |
Liner - UL1777 |
| Minimum liner height (feet) |
12' |
| Baffle type |
C-Cast or equivalent |
| Approved for an alcove installation |
Not applicable |
| Approved for a mobile home installation |
No |
| Fireplace type |
Masonry only |
| Shipping Weight |
491 lb (223 kg) |
| Door type |
Single, glass with cast iron frame |
| Glass type |
Ceramic glass |
| Glass surface – dimensions (Width X Height) |
19 5/8" X 11 7/8" |
| Glass air-wash system |
Yes |
| Premium quality blower included (CFM) |
90 |
| Overall dimension (Height) |
25 1/8" |
| Overall dimension (Width) |
36 1/8" |
| Overall dimension (Depth) |
23 1/8" |
| Door opening – dimension (Height) |
8 3/4" |
| Door opening - dimension (Width) |
17 1/2" |
| Firebox – dimension (Height) |
11 7/8" |
| Firebox – dimension (Width) |
21" |
| Firebox – dimension (Depth) |
16 3/4" |
| Fireplace opening – minimum (Height) |
23 3/8" |
| Fireplace opening – minimum (Width) |
28 7/8" |
| Fireplace opening – minimum (Depth) |
19 5/8" |
| Firebox lined with refractory bricks for better heat distribution |
Yes |
| Stainless-steel secondary-air system improving gas combustion |
Yes |
| Steel thickness – body |
3/16" |
| Steel thickness – top |
5/16" |
| USA standard (emissions) |
EPA |
| USA standard (safety) |
UL 1482, UL 737 |
| Tested and listed as per applicable standards |
By an accredited laboratory |
| Warranty |
Limited lifetime |
Manuals/Documents
