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Osburn Matrix Wood Insert with Connector and 5.5" x 25' Liner Kit

Osburn Matrix Wood Insert with Connector and 5.5" x 25' Liner Kit

Regular price $3,949.00
Regular price Sale price $3,949.00
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Osburn products are made to order. The estimated lead time is 12-18 weeks.


This updated version of the Matrix wood insert will seduce you with an average particle emission rate as low as 1.54 g/h. The latest modifications made to this box are well in tune with the industry standards required for 2020. Although it retains a unique style that is both massive and sleek, we have reviewed the door mechanism 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.

***Note that in order to install the optional projection kit AC01323, one of the optional faceplate backing plate kits AC01322 or AC01332 must be purchased separately to secure the projection kit to it.***


Panels - Overall panel dimensions: 36 1/8”W x 25 1/8”H

Included items: one Osburn Matrix wood insert (OB02028), one connector with Forever Flex 5.5"Ø x 25' flexible liner, one 13" x 13" top plate, and one chimney cap with screen, entirely made of stainless steel..

        Appliance Performance
        Fuel type : Dry cordwood
        Recommended heating area-ft² : (*) 500 - 2,100
        Overall firebox volume : 2.4
        EPA loading volume-ft³ : 2.02
        Maximum burn time : (*) 8 h
        Maximum heat output (dry cordwood) : (2) 75,000 BTU/h (22.0 kW)
        Overall heat output rate < : (2) (3) 14,800 BTU/h (4.34 kW) to 28,600 BTU/h (8.38 kW)
        Average overall efficiency (EPA cribs/Douglas fir) : (3) N.A. (HHV) (4) N.A. (LHV) (5)
        Average overall efficiency (dry cordwood) : (3) 69 % (HHV) (4) 74 % (LHV) (5)
        Optimum efficiency : (6) (7) 77 %
        Average particulate emissions rate : (8) 1.54 g/h
        Average CO : (9) 89.4 g/h

        (1) Values are as measured per test method, except for the recommended heating area, firebox volume, maximum burn time and maximum heat output.

        (2) The maximum heat output (dry cordwood) is based on a loading density varying between 15 lb./ft³ and 20 lb./ft³. Other performances are based on a fuel load prescribed by .the standard. The specified loading density varies between 7 lb./ft³ and 12 lb./ft³. The moisture content is between 19% and 25%.

        (3) As measured per CSA B415.1-10 stack loss method.

        (4) Higher Heating Value of the fuel.

        (5) Lower Heating Value of the fuel.

        (6) Performances based on a fuel load prescribed by the standard at 7 lb/ft³ and with a moisture content between 19% and 25%.

        (7) Optimum overall efficiency at a specific burn rate (LHV).

        (8) This appliance is officially tested and certified by an independent agency.

        (9) Carbon monoxide.

        General Features
        Combustion technology Non-catalytic
        High-efficiency certified appliance Yes, EPA 2020 approved
        Maximum log length 20"
        Log positioning Over width
        Chimney diameter 6"
        Flue outlet diameter 6"
        Type of chimney Liner - ULC-S635, CAN/ULC-S640, UL1777
        Minimum chimney height (feet) 12'
        Baffle type C-Cast
        Approved for a mobile home installation No
        Shipping Weight 484 lb. (220 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"
        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"
        Fireplace opening – minimum (Height) 23 5/16"
        Fireplace opening – minimum (Width) 28 7/8"
        Fireplace opening – minimum (Depth) 19 5/8"
        USA standard (emissions) EPA / ASTM WK47329
        Canadian Standard (emissions) CSA B415.1-10
        USA standard (safety) UL 1482, UL 737
        Canadian standard (safety) ULC S628
        Tested and listed as per applicable standards By an accredited laboratory (CAN/USA)
        Warranty Limited lifetime
        Minimum clearances to combustibles*
        (Data expressed in inches. 1 inch = 25.4 mm)
        Canada United-States
        Clearance – combustible side mantle to unit 9" 9"
        Clearance – combustible top mantle to unit 27" 27"
        Clearance – combustible side wall to unit 16" 16"
        Clearance – minimum floor protection in front of the appliance 18" 16"
        Clearance – top shelf to unit 27" 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)



        75,000 BTU

        Heating Capacity

        500-2,100 sq. ft.

        Firebox Size

        2.4 cu ft.

        Log Length

        up to 20”

        Flue Pipe Diameter



        484 lbs.


        36 ⅛”


        23 1/8”


        25 1/8”

        Minimum Opening-Width

        28 ⅞”

        Minimum Opening-Depth

        19 ⅝”

        Minimum Opening-Height

        23 ¾”


        Click to see options

        29" X 44" Faceplate Backing Plate Kit

        --- covers the gap between the insert and the fireplace perimeter

        29" X 50" Faceplate Backing Plate Kit

        --- covers the gap between the insert and the fireplace perimeter

        5" Fresh Air Intake Kit

        --- recommended to reduce or eliminate negative pressure problems

        5'' Fresh Air Intake Register with Airtight Damper

        --- allows outside combustion air to feed the appliance

        Bottom Faceplate Backing Plate 44" X 6"

        --- installs below the fireplace insert opening, mirroring the upper surround bar

        Bottom Faceplate Backing Plate 50" X 6"

        --- installs below the fireplace insert opening, mirroring the upper surround bar

        Offset Liner Adaptor

        --- allows your flexible liner to be offset to the rear of an insert outlet.

        Projection Kit for Insert 2" or 4"

        --- increased projection allows for greater heat output

        Rigid Firescreen

        --- easy to remove screen allows door to be opened for fire viewing


        Click to see accessories

        Adhesives, Gaskets and Insulation

        High Temperature Red Silicone (300 ml - 10.1 fl.oz.)

        High Temperature Clear Silicone (300 ml - 10.1 fl.oz.)

        Silicone and 5/8" X 8' Black Door Gasket Kit

        --- includes 8' of 5/8" dia. black gasket and one tube of high-temp silicone adhesive

        SBI Black Stove Gasket Kit - 5/8 Inch x 8 Feet


        Metallic Black Stove Paint – 342g (12oz) Aerosol

        --- adheres well and dries quickly and retains color well over time

        Metallic Black Stove Paint – 342g (12oz) Aerosol

        --- help keep your stove looking its best.

        Maintenance Products

        Ash Vacuum Cleaner

        --- designed almost exclusively for ash collection

        Pull Ring (3/8" NPT)

        --- securely connects to brushes and give you that extra safety while you use your chimney rod

        Kevlar Thread Wood Stove And Fireplace Gloves

        --- gloves are recommended for a safe and clean use with any type of wood-burning appliance.

        Dry Cleaning Pad

        --- easily cleans the soot from glass without water

        Wood Appliance Glass Cleaner (500ml - 16.9fl.oz.)

        --- recommended for cleaning the glass of any type of wood-burning appliance


        Digital Moisture Reader

        --- accurately measures moisture content in wood logs. Wood should be below 20% humidy content


        5" X 10' Insulated Flex Pipe for Fresh Air Intake Kit

        --- water repellent, corrosion, and high static pressure resistant

        5" X 25' Insulated Flex Pipe for Fresh Air Intake Kit

        --- water repellent, corrosion, and high static pressure resistant

        Fire Starters

        Sachet Pouches Fire Starter

        Wood and Paraffin Fire Starter Cubes

        --- safe, odorless, soot less, strong burning; can be stored indefinitely and does not dry out

        Fire Lighting Gel (500ml – 16fl.oz.)

        --- allows you to start wood, oil, and pellet fires quickly and easily


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