Osburn 3500 Wood Burning Fireplace Insert with Blower - OB03510 - Heats 2700 Sq Ft

By

Osburn

In stock
Model

OB03510

ID

82780

Was $3,479.00 Your Low Price Special Price $3,379.00
 
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  • Heats 2700 Square Feet
  • Heat Circulating Blower Included
  • Minimum Fireplace Dimensions: 31"W x 26 1/4"H x 18 3/8"D

The Osburn 3500 Wood Insert is the biggest and baddest non-catalytic wood insert on the market. No problems getting an overnight burn with the massive 3.5 cubic foot fire box. Producing up to 110,000 BTUs, the Osburn 3500 will comfortably heat up to 2,700 square feet in your home.

Choose from our selection of door overlays, faceplates, and faceplate finishes to make it truly unique to suit your home’s décor. Leave the ordinary behind and get this beautiful and powerful fireplace insert.

Features

  • BTU's: 110,000
  • Weight: 540 lbs
  • Heat Capacity: 1,000 – 2,700 square feet
  • Minimum Fireplace Dimensions: 31"W × 26 1/4"H × 18 3/8"D
  • Ceramic Glass Size: 18 7/8"W × 11 3/4"H
  • Maximum Burn Time: 10 hours
  • Maximum Efficiency: 77%
  • Firebox Volume: 3.5 cubic feet
  • Max Firewood Length: 22"
  • Emissions Grams/Hour: 1.32
  • Flue Size: 6"
  • Warranty: Limited Lifetime
  • Certification: EPA, UL 1482, UL 737
  • This model IS Mobile Home Approved

More About Wood Burning Appliances

Heating with wood offers a timeless and renewable source of warmth, creating an ambiance only watching a real fire can create. Whether you considering a Freestanding Wood Stove, Wood Fireplace Insert, a Built In EPA-Approved Heating Fireplace or an Open Burning Built In Fireplace, you will find today's modern appliances offer increased efficiency and safety features compared to older wood appliances. 

Available Types:

  • Freestanding Wood Stoves
  • Wood Fireplace Inserts
  • Open Burning Built In Wood Fireplaces
  • High-Efficiency Built In Wood Fireplaces

More About Fireplace Inserts

Fireplace Inserts are high-efficiency heating appliances designed to be installed into an existing fireplace opening. Fireplace Inserts offer a range of benefits, including: increased efficiency, higher heat output, are safer to operate, improve fireplace aesthetics and are often easier to operate. 

Available Types:

  • Wood Burning Fireplace Inserts
  • Gas Direct Vent Fireplace Inserts
  • Ventless Fireplace Inserts
  • Pellet Stove Inserts
  • Electric Fireplace Inserts

Note: Fireplace Inserts cannot be installed into a wood framed cavity.


 

Osburn Stoves & Fireplaces

Discover premium Osburn wood-burning stoves, pellet stoves, and fireplace inserts—designed for lasting performance, energy efficiency, and timeless style. Whether you’re upgrading an existing fireplace or installing a new heating solution, Osburn offers freestanding, built-in, and insert models to match any space. Browse our full selection at wholesale prices and explore detailed specs, manuals, and installation resources to find the perfect fit for your home.

More Information
Osburn 3500 Wood Burning Fireplace Insert with Blower - OB03510 - Heats 2700 Sq Ft
FeatureSpec
SKUOB03510
Weight540.000000
ManufacturerOsburn
Heating BTU110,000
Flue Outlet6" Diameter | Top
Square Footage1,000 - 2,700
Electrical120V (Included Blower)
Amperage RequirementLess Than 5 Amps
MaterialSteel
TypeBrick & Stone Fireplace Insert
Ignition TypeMatch Light
Fuel TypeWood
CertificationEPA, UL 1482
Size Range30" - 39" Wide
Area Heated2500 - 2999 Sq. Ft
Fireplace StyleTraditional
Viewing Area18 7/8"W x 11 3/4"H
Minimum Fireplace Dimensions31"W x 26 1/4"H x 18 3/8"D
Max Log Length22"
WarrantyLimited Lifetime
Resources
Safety InformationPROPOSITION 65 WARNING
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Customer Questions
Does this stove qualify for a tax credit?
Yes this model qualifies for tax credit. Bear in mind however that this model is a fireplace insert and not a stove. We do have wood-burning stoves that qualify for tax credit as well, such as the Osburn 3300 stove. If you have any further questions, please call us and we will be happy to assist you.
What size is the fire box?
The firebox is 24 7/4" H x 27 5/8" W x 29" D If you have any further questions, please call us and we will be happy to assist you.
Can you use in a prefab fireplace?
This question may be better for the company the prefab fireplace came from. Whether or not the fireplace is certified to be equipped with wood burning inserts would allow for determining which is best suited for you. If you have any further questions, please call us and we will be happy to assist you.
Why is the 3500 cheaper than the 2700 ,a bigger model, more btu?
The 2700 is a more compact heater, designed to be flush mounted into a masonry fireplace with a more decorative cast iron façade. The 3500 is absolutely a larger, workhorse of a heater. If you have any further questions please feel free to give us a call! Thanks.
Is 13x13 inch Terra Cotta top plate available?
We recommend you either give us a call to speak with a representative who can answer part questions or to reach out to the manufacturer themselves. Our team can help you find the part you are looking for.
Will this fit a Temco 36-3 fireplace?
Please give us a call so we can get a little more information about your exact situation. That way we can give you a confident answer to your question.
Does this stove come with a fan?
Yes, this unit does come with the blower included. If you have any further questions please feel free to give us a call! Thanks.
Where are you located?
Our office is located in Troy, OH and we have warehouses located in Dayton, OH as well as Atlanta, Georgia. If you have any further questions or need further assistance, please feel free to reach out to one of our experienced customer service representative and they would be happy to assist you. Thank you and have a wonderful day.
Does it have an ashtray?
Hello, there is no ashtray but there is an ash lip that allows for the ash to be contained within the unit and prevents it from making a mess. If you have any further questions please feel free to give us a call! Thank you.
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