Osburn 3500 Wood Insert

Regular Price $4,024.00
Special Price $3,499.00
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Product Overview

Osburn 3500 Wood Insert offers a high-end wood log insert designed for maximum heat output and efficiency. One of the most popular Osburn units, the 2000 Insert combines high quality combustion properties with a powerful, strategically positioned blower designed to increase circulation and efficiently distribute heat throughout a room. The Osburn 2000 is an EPA-certified appliance with an efficiency rating of 77 percent to ensure a clean burn. This premium unit features a firebox lined with refractory bricks for more even heat distribution, while the stainless steel secondary air system improves gas combustion and reduces harmful gas emission.

The approximate heating area ranges from 500 - 2,100ft², while the unique design also creates an automatic glass "air wash" system to keep the glass door clean without any additional effort. The heavy duty carbon steel construction ensures a high-quality and durable product, while the metallic black color integrates into any room's decor.

The Osburn 2000 features a number of customizable aesthetic options, as well. A steel door overlay is available in either black or brushed nickel to match room décor, while regular and large faceplate trim options are available to create a cohesive look for your hearth.


  • Heavy Duty Construction - Black Metallic carbon steel construction for long term durability
  • High Efficiency Unit - EPA-certified appliance with a 77 percent efficiency rating, 1.54 g/h emissions rate
  • Refractory Bricks - Heavy duty ceramic bricks provide better, more even heat distribution
  • Glass Air-Wash System - Unique vacuum design creates an efficiently combustion to prevent creosote build-up on the glass door
  • Secondary Combustion Zone - Unique secondary air system creates second combustion zone to improve combustion
  • 75,000 BTU Output - 75,000 BTU output for approximate heating area between 500 - 2,100ft²
  • Included Blower - Premium quality 144-CFN convection blower included
  • Max Burn Time - Burns up to 6 - 8 hours in slow combustion mode

Configurable Options

  • Overlay - Choose between (2) door overlay color options: Nickel or Black
  • Faceplate - Choose from (2) faceplate sizes: Regular and Large
  • Trim Kit - Choose between (2) trim color options: Black or Brushed Nickel
More Information
Manufacturer Osburn
Manufacturer Part Number OB03510-Config
Recommended Heating Area (sq. ft.) 1,000 - 2,700
Color Metallic Black
Door Type Single, glass with cast iron frame
Glass Surface 18 7/8" X 11 3/4"
Glass Viewing Area (sq. in.) 222
Glass Type Ceramic
Opening - Width 19"
Opening - Height 9 7/8"
Ash Drawer Available No
Blower Kit Available Yes
Burn Time 8 - 10 hrs
Max Output - EPA test wood 49,500 BTU/h
Max BTU - Cord Wood 110,000 BTU/h max.
Overall - Depth 29"
Overall - Width 30 3/8"
Overall - Height 24 7/8"
Firebox - Depth 20 1/8"
Firebox - Width 22 7/8"
Firebox - Height 12 7/8"
Firebox - Volume (sq. ft.) 3.5
Baffle High heat-resistant C-cast
Combustion Technology Non-Catalytic
Log Length (Max) 22"
Log positioning Over width
Steel thickness (top) 3/8"
Combustible side wall to unit 19"
Combustible shelf to unit (US) 27"
Combustible top mantle to unit 27"
Combustible side mantle to unit 9"
Minimum Fireplace Opening - Width 31"
Minimum floor protection in front of unit 18" CAN / 16" USA
Minimum Fireplace Opening - Height 26 1/4"
Minimum chimney height (feet) 15
Type of Chimney (°F) ULC S635, CAN/ULC-S640, UL 1777
Recommended Chimney Diameter 6"
Mobile Home Approved No
Optimum efficiency 77%
Emissions (grams/hour) 1.32 g/h
Warranty-ws Limited Lifetime
Tested or/and listed as per applicable standards by Interlek
Fuel Type Wood
Weight 540 lbs
Made in USA No
  • Overall Dimensions - 23.125" x 28.375" x 26.375" (Height, Width, Depth)
  • Firebox Dimensions - 11.875" x 21" x 16.75" (Height, Width, Depth)
  • Weight - 407 pounds
  • Maximum Log Length - 20"
  • Recommended Connector Pipe - 6" diameter
About the Manufacturer

Osburn wood stoves are manufactured by Stove Builder International (SBI), a family-owned Canadian company. SBI is dedicated to the design, manufacturing, and marketing of residential heating appliances sold around the world in order to create an environmentally sustainable heating solution.