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Osburn 3500 Wood Fireplace Insert

Osburn 3500 Wood Fireplace Insert

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Product Details

Manufacturer: Osburn
Osburn Part Numbers: OB03510
Item Number: OSB-OB03510


  • Size: 30 Inches
  • Color: Black
  • Product Dimensions: 30 3/8" W x 25 3/4" H x 29" D
  • Cast iron door
  • EPA 2020 approved
  • Modern, sleek design
  • Limited lifetime warranty
  • Uses dry cordwood for fuel
  • Holds logs up to 22" in length
  • Non-catalytic fireplace insert
  • UL 1482, UL 737 safety standards
  • Maximum burn time of 10 hours
  • Made of the highest quality material
  • Single ceramic glass door with cast iron frame
  • Multiple overlays, faceplates, and trims available
  • Blower quietly distributes heat throughout the room
  • Recommended to heat 1000 to 2,700 square feet of space
  • Maximum BTU Output with Dry Cordwood: 110,000
  • Average Particulate Emissions Rate: 1.32g/h
  • Recommended Heating Area: 2,700
  • Minimum Required Fireplace Opening Dimensions: 31" W x 26 1/4" H x 18 3/8" D
  • Flue Size: 6 inches
  • Glass Viewing Area: 18 7/8" W x 11 3/4" H
  • Maximum Log Size: 22
  • 71% efficient based on an EPA-specified test method (CSA B 415-10 stack loss method). Actual efficiency will vary.
When it's cold out who do you turn to? We turn to the Osburn 30 Inch 3500 Series Wood Fireplace Insert. Made from high-quality material like cast iron, ceramic, and more this unit is bound to last you for years. With up to 10 hours of burn time this unit will keep you warm all throughout winter as needed. So go ahead and turn to Osburn. We won't blame you.

Venting Requirements: This item requires a chimney with 6" inner diameter.

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Customer Q&A with Product Specialists

Don W. from Grangeville Idaho 83530 asked:
Does this have heat activated fan sensor?
Does this have heat activated fan sensor?
Yes, the blower is equipped with a heat-activated sensor and rheostat for speed control.
Answered by: Cody S. on Jun 02, 2023


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