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Osburn Matrix Wood Burning Insert

Approx. Heating Area: 500 - 2,100 sq. ft.
Max Output: 75,000 BTU/h
Starting at $2699


The Matrix wood insert defines the new standards for contemporary look and performance. This fireplace insert looks like a sleek fireplace, but has all the advantages of an insert. Its faceplate and blower assembly were developed to allow a flush finish with the masonry fireplace. Cast iron was selected as the material of choice for this clean and modern unit. Installation into larger openings is facilitated by the use of an optional sheet metal backing plate. This insert will surely become the focal point of the room.


  • High-efficiency appliance 2020 EPA approved
  • Blower Included : 90 CFM
  • Recommended heating area : 500 - 2,100 square feet
  • Maximum burn time : 8 hours
  • Maximum heat output : 75,000 BTU/h
  • Glass air-wash system
  • Firebox lined with refractory bricks for better heat distribution
  • Stainless-steel secondary-air system improving gas combustion
  • Constant view of the fire through 19 5/8" x 11 7/8" glass surface
  • Approved Chimney Liner: Rock-Flex Stainless Flexible Liner Kit

Specifications & Manual

Osburn Matrix Wood Insert Manual

Osburn Matrix Wood Insert Dimensions

Osburn Matrix Wood Burning Insert
Type of Fuel Wood
Minimum chimney height (feet) 12
Recommended chimney diameter 6"
Minimum fireplace opening (Width) 28 7/8"
Minimum fireplace opening (Height) 23 5/16"
Minimum fireplace opening (Depth) 19 5/8"
Depth - Overall 23 1/8"
Height - Overall 25 1/8"
Width - Overall 36 1/8"
Firebox dimensions (Depth) 16 3/4"
Firebox dimensions (Width) 21"
Firebox dimensions (Height) 11 7/8"
Firebox volume (cu. ft.) 2.4
Recommended Heating Area (sq. ft.) 500-2,100
Maximum log length 20"
Log positioning Over width
Door opening dimensions (Width) 17 1/2"
Door opening dimensions (Height) 8 3/4"
Type of Door Single, glass with cast iron frame
Glass Surface 11 7/8" x 19 5/8"
Glass Type Ceramic glass
Weight 484 lb (220 kg)
Center line of flue outlet to the back 5 5/8"
Center line of flue outlet to the side 13 1/2"
Maximum output - EPA test wood 28,600 BTU
Maximum output - seasoned cord wood 75,000 BTU
Steel thickness (body) 3/16"
Steel thickness (top) 5/16"
Optimum efficiency 77%
Emissions (grams/hour) 1.54 g/h
Baffle High heat-resistant C-cast
Approval for Mobile Home Installation No
Canadian Standard (emissions) CSA B415.1-10
USA standard (emissions) EPA
Canadian Standard (safety) ULC-S628
USA standard (safety) UL-1482, UL-737
Warranty Limited lifetime

Minimum Clearances to Combustibles

Osburn Matrix Insert Minimum Clearances to Combustibles*
Clearance – combustible side mantle to unit 9"
Clearance – combustible top mantle to unit 27"
Clearance – combustible side wall to unit 16"
Clearance – minimum floor protection in front of the appliance 16" US / 18" CA
Clearance – top shelf to unit 27"
* The information given on the certification label affixed to the appliance always overrides the information published in any other media (owner's manual, catalogues, flyers, magazines and/or web sites).
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