Osburn Matrix 2700 EPA 2020 Wood Insert
80,000 BTU/hr of heat from dry cordwood, 750 to 2,200 square feet of coverage and burn times up to 8 hours, behind a 24-3/8" x 12-5/8" ceramic-glass view. The Osburn Matrix 2700 is an EPA 2020 certified non-catalytic wood insert with a 2.5 cu ft firebox, 1.2 g/h particulate emissions, a tapered body for a masonry opening at least 31-3/4" wide, 27-1/8" high and 22-1/8" deep, and a cast iron faceplate and 176 CFM blower in the box. It starts from $4,619 for the insert alone — the door overlay you choose above is required to complete it — and carries Osburn's limited lifetime warranty on the firebox welds and cast iron door frame.
Choose the Matrix 2700 if you want the widest fire view in the Osburn insert line in a large masonry fireplace: its view is 24-3/8" across, it takes the 16" logs most firewood is cut to (up to 20"), and the blower moves heat into the room on its own once the insert is hot. The cast iron faceplate is already in the box, so the only choice to make is a black or brushed nickel door overlay; if your fireplace is shallow, the optional 2" or 4" projection kit brings the needed depth down to 20-1/8" or 18-1/8".
It is not right for a factory-built fireplace, a mobile or manufactured home or a bedroom — it installs only inside a masonry fireplace and lined masonry chimney, on its own 6" stainless steel liner, and the opening must be at least 27-1/8" high and 31-3/4" wide. It is a zone heater rather than a furnace, and a conventional backup heating system is still recommended. In the United States it burns with the door closed: open-door burning behind the fire screen door is not permitted, so if you want an open fire this is not the insert.
Specifications
The masonry opening must be at least 27-1/8" high, 31-3/4" wide and 22-1/8" deep — 20-1/8" or 18-1/8" with the 2" or 4" projection kit — and Osburn recommends 4" more width if you add a fresh air intake. Across the cast iron faceplate the insert is 43-5/8" wide and 30-1/8" high, and it is 27-1/4" deep overall. Keep 19" from the insert to an adjacent side wall and 9-1/2" to a combustible side surround; a combustible mantel shelf up to 12" deep sits at least 12" above the top of the faceplate. In front, non-combustible floor protection reaches 16" from the door opening (18" in Canada) and 8" to the side on a raised hearth; on a hearth near floor level the added protection needs an R-value of 1.00 or more and reaches 20", or 22" with the projection kit — section 9.2 on pages 30 to 33 of the installation manual shows which case applies and whether your hearth extension already covers it. The venting is a continuous 6" stainless steel liner listed to UL 1777, in a system at least 15 ft tall from the floor to the top of the chimney, 3 ft above the roof and 2 ft above anything within 10 ft.
How the Matrix 2700 compares to the Matrix and Matrix 1900 inserts
The Matrix 2700 is the largest of Osburn's three Matrix inserts. It is rated 80,000 BTU/hr and 750 to 2,200 sq ft with a 2.5 cu ft firebox and a 24-3/8" x 12-5/8" view, against 75,000 BTU/hr, 500 to 2,100 sq ft, 2.4 cu ft and a 19-5/8" x 11-7/8" view for the Matrix, and 45,000 BTU/hr, 250 to 1,200 sq ft, 1.1 cu ft and an 18" x 8-1/8" view for the Matrix 1900. It also needs the biggest opening — 27-1/8" x 31-3/4" x 22-1/8" (H x W x D) against 23-3/8" x 28-7/8" x 19-5/8" for the Matrix — and like the Matrix its depth can be reduced with the projection kit. The Matrix 2700 starts from $4,619, the Matrix from $3,949 and the Matrix 1900 from $3,239.
Features
- EPA 2020 certified non-catalytic wood insert — 80,000 BTU/hr maximum on dry cordwood and 1.2 g/h particulates, rated for 750 to 2,200 sq ft
- 2.5 cu ft firebox that takes 16" logs (up to 20") loaded east-west, with burn times up to 8 hours
- Wide 24-3/8" x 12-5/8" ceramic-glass view in a cast iron door, finished with a black or brushed nickel door overlay
- Cast iron faceplate and a 176 CFM blower come standard — the blower starts on its own when the insert is hot and stops when it cools
- Tapered body for a masonry opening at least 31-3/4" wide, 27-1/8" high and 22-1/8" deep, or 18-1/8" deep with the optional 4" projection kit
- 6" flue outlet for a stainless steel chimney liner, with the liner brackets and screws in the box
Answers to common questions
What venting does the Matrix 2700 need, and is any of it included?
It needs a 6" stainless steel chimney liner listed to UL 1777, running continuously from the insert's 6" flue outlet to the top of your masonry chimney, and the liner itself is not included — our team puts the venting package together for your chimney. The insert ships with the three brackets and screws that fasten the liner's starter adapter to the flue outlet, and Osburn also makes a liner hook up system and an offset liner adapter; the offset adapter is a last resort, used only where the fireplace and chimney total at least 20 ft. The whole system must be at least 15 ft from the floor to the top of the chimney, extend 3 ft above the roof and 2 ft above anything within 10 ft, and a 12" length of rigid liner at the top is strongly recommended. The fireplace damper is locked open or removed, the liner may not connect straight into the clay tile, and the flue may serve no other appliance.
Will the Matrix 2700 fit my fireplace?
It fits a sound masonry fireplace with an opening at least 27-1/8" high, 31-3/4" wide and 22-1/8" deep — Osburn recommends 4" more width if you plan a fresh air intake — and it installs only inside a masonry fireplace with a lined masonry chimney. If your fireplace is shallower, the optional 2" or 4" projection kit sets the insert forward and brings the needed depth down to 20-1/8" or 18-1/8"; Osburn's kit instructions call for it whenever the faceplate would otherwise sit behind the front of the opening. The cast iron faceplate in the box is 43-5/8" wide and 30-1/8" high; for an opening bigger than that, the optional 34" x 50" cuttable faceplate is cut to size and fastened to it.
How close can a mantel, wall or surround be, and what goes on the floor?
Keep 19" from the insert to an adjacent side wall and 9-1/2" to a combustible side surround. A combustible mantel shelf can be up to 12" deep and must sit at least 12" above the top of the faceplate, with or without the projection kit. In front, non-combustible floor protection reaches at least 16" from the door opening (18" in Canada) and 8" to the side when your hearth is raised; on a hearth at or near floor level the added protection needs an R-value of 1.00 or more and reaches 20" in front, or 22" with the projection kit. Section 9.2 on pages 30 to 33 of the installation manual shows which case applies to your hearth and whether your existing hearth extension already covers it.
What’s included, what’s required, and what’s optional?
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Included in the box: Cast iron faceplate with its grille and decorative top panel; Pre-installed blower up to 176 CFM with variable speed control, heat sensor and a 96" power cord; Cast iron door with 4 mm ceramic glass and air wash; Refractory-lined firebox, C-Cast baffle, four stainless steel secondary air tubes and a log holder; Three liner fixation brackets with screws, a damper notice plate, a fresh-air cover plate and a hard-wiring sleeve; EPA 2020 certification, UL 1482 / UL 737 safety listing, and the Osburn limited lifetime warranty.
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Required to complete the installation, purchased separately: Door Overlay - the black or brushed nickel cast iron overlay that finishes the insert's door frame (choose above); the insert ships without one; Venting - a 6" listed stainless steel chimney liner running continuously from the insert to the top of the chimney (see pg 29 in the installation manual); Masonry Fireplace - an existing masonry fireplace and lined masonry chimney with an opening at least 27-1/8" high, 31-3/4" wide and 22-1/8" deep (18-1/8" with the 4" projection kit); Floor Protection - non-combustible protection 16" in front of the door opening and 8" to the side on a raised hearth; R 1.00 or better reaching 20" in front on a hearth near floor level; Electrical - a standard outlet within reach of the blower's 96" cord, or a hard-wired connection by a certified electrician.
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Optional: The fire screen door, the 5" fresh air intake kit and insulated flex pipe, the 2" or 4" projection kit, the 34" x 50" cuttable faceplate, the offset liner adapter and the liner hook up system — the insert burns and heats without any of them, though the projection kit becomes necessary when the faceplate would otherwise sit behind the front of the fireplace opening.
Does it need an outside air supply?
Not by default — room air is the safest and most reliable combustion supply, whichever door overlay you choose, and the fresh air intake is optional. It matters in a house where a powerful exhaust such as a kitchen range hood can pull the pressure negative. The 5" fresh air intake kit fits on the right or left side and connects to an outside wall termination through insulated HVAC pipe (ULC S110 / UL 181, class 0 or 1), which Osburn sells as a 5" x 4' flex pipe; allow 4" more width in the fireplace opening for it.
Can I burn it with the door open, like an open fireplace?
Not in the United States — the door stays closed while it burns, whichever overlay you choose. The insert was tested for open-door use with Osburn's fire screen door, but in the US, and in any Canadian province with a particulate emission limit, open-door burning behind a fire screen is prohibited. Where it is allowed, the screen must be secured in the door opening, the door is never left partly open, and the insert is never left unattended with the door open.
Does buying online affect my Osburn warranty?
No. The warranty is Osburn's and applies to every configuration on this page; it runs from your dated purchase invoice, so keep it and register the insert online at osburn-mfg.com, noting the model and serial number from its nameplate. The Torch Guys will help you with any claim. Coverage is a limited lifetime on the combustion chamber welds and cast iron door frame (5 years labour) and on the ceramic glass, 7 years on surrounds, trims, baffle and air tubes, 5 years on the handle and air control, 2 years on the blower and controls, and 1 year on paint, gaskets and insulation; lifetime items are limited to one replacement. It requires installation by an authorized qualified technician and covers the original purchaser only.
