Osburn 3500 Wood Burning Insert
Product Images
Osburn 3500 Wood Burning Insert
Osburn 3500 Wood Burning Insert
Osburn 3500 Wood Burning Insert
Black Door Overlay
Brushed Nickle Door Overlay
Medium Faceplate (32 in. x 44 in.)
Large Faceplate (32 in. x 50 in.)
Black Faceplate Trims
Brushed Nickel Faceplate Trims
5 in. Fresh Air Intake Kit
Rigid Firescreen
Product Details:
The Osburn 3500 Wood Burning Fireplace Insert is one of the most powerful inserts in its class. The 3.5 cubic ft firebox is capable of handling up to a 22" log with a maximum burn time of up to 10 hours. It produces up to 110,000 BTUs with a heating area up to 2,700 square ft. A 144 CFM blower is included to help push the heat throughout the space. The Osburn 3500 insert is EPA approved with an optimum efficiency rating of up to 77% and a low 1.32 average particle emissions rate, it is rare for an insert this large to burn this clean.
The large 18 7/8" x 11 3/4" glass surface is the focal point of the Osburn 3500 wood insert, allowing you to enjoy the beauty of the flame while you cozy up next to the warmth of the insert. The clean lines of the insert allow the Osburn 3500 to fit with just about any decor. You can choose between the black or brushed nickel for the finish trim and door overlay to help tailor the look of the insert. You will never have to worry about a drafty fireplace again after you update your fireplace with the Osburn 3500 Wood Insert. The large heating capacity is sure to warm up your extra large space in even the coldest of winters.
Specifications & Manual
Osburn 3500 Wood Burning Insert Installation Manual
Osburn 3500 Wood Burning Insert Dimensions
| Osburn Matrix 3500 Wood Burning Insert Specifications | |
| Overall firebox volume-ft³ : | 3.5 |
| Overall firebox volume-ft³ : | 2.84 |
| Maximum burn time : | 10 h |
| Maximum heat output-dry cordwood : | 110,000 BTU/h (32.2 kW) |
| Overall heat output rate | 18,100 BTU/h (5.3 kW) to 49,500 BTU/h (14.5 kW) |
| Average overall efficiency (dry cordwood) : | 71 % (HHV) 76 % (LHV) |
| Optimum overall efficiency : | 77% |
| Optimum heat transfer efficiency : | 76% |
| Average particulate emissions rate : | 1.32 g/h |
| Average CO | 92 g/h |
| Combustion technology | Non-catalytic |
| High-efficiency certified appliance | Yes, EPA 2020 approved |
| Maximum log length | 22” |
| Log positioning | Loading over width and over depth |
| Flue outlet diameter | 6” |
| Type of chimney | Liner - ULC-S635, CAN/ULC-S640, UL1777 |
| Minimum chimney height (feet) | 15’ |
| Baffle type | C-Cast or equivalent |
| Approved for a mobile home installation | No |
| Shipping Weight | 540 lb (245 kg) |
| Door Type | Single, glass with cast iron frame |
| Glass type | Ceramic glass |
| Glass surface – dimensions (Width X Height)) | 18 7/8" X 11 3/4" |
| Glass air-wash system | Yes |
| Premium quality blower included (CFM) | 144 |
| Overall dimension (Height) | 24 7/8" |
| Overall dimension (Width) | 30 3/8" |
| Overall dimension (Depth) | 29" |
| Door opening – dimension (Height) | 9 7/8" |
| Door opening - dimension (Width) | 19" |
| Firebox – dimension (Height) | 12 7/8" |
| Firebox – dimension (Width) | 22 7/8" |
| Firebox – dimension (Depth) | 20 1/8" |
| 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" |
| Fireplace opening – minimum (Height) | 26 1/4" |
| Fireplace opening – minimum (Width) | 31” |
| Fireplace opening – minimum (Depth) | 18 3/8" |
| USA standard (emissions) | EPA |
| 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 |
| Steel thickness – body | 3/16" |
| Steel thickness – top | 5/16" |
| Fireplace opening – minimum (Height) | 26 1/4" |
| Fireplace opening – minimum (Width) | 31” |
| Fireplace opening – minimum (Depth) | 18 3/8" |
| USA standard (emissions) | EPA |
| 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) |
Minimum Clearance to Combustibles
| Clearance to Combustibles* | Canada | United States | ||
|---|---|---|---|---|
| Clearance – top (measured from the platform on which the appliance is installed) | 84" | 84” | ||
| Clearance - Combustible side mantle to unit | 9" | 9” | ||
| Clearance - Combustible top mantle to unit | 27" | 27” | ||
| Clearance – Combustible side wall to unit | 19" | 19” | ||
| Clearance - from the top of the unit to the shelf | 27” | |||
| Clearance – from the top of the insert to the shelf | 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). | ||||
| ** Some appliances have been tested with a low ceiling. Before setting up your unit, refer to the installation manual. | ||||
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