Osburn 3500 EPA Certified Wood Burning Fireplace Insert with Blower - Heats 2,700 Sq Ft

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Osburn

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Model

OB03510

ID

82780

$3,719.00
 
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  • Capable of Heating Up To 2,700 Square Feet
  • Easily Handles up to 22" Logs
  • Meets EPA 2020 Standards For Efficiency
  • Includes A Blower Kit
  • Reliable Heat During Power Outages
  • Minimum Fireplace Dimensions: 31"W x 26 1/4"H x 18 3/8"D
  • Expansive 3.5 Cubic Foot Firebox
  • High Efficient Non-Catalytic Design

3500 EPA Certified Wood Burning Fireplace Insert with Blower for Cleaner Wood Heat, Improved Fireplace Performance, and Dependable Backup Comfort

Osburn 3500 EPA Certified Wood Burning Fireplace Insert with Blower - OB03510 - Heats 2,700 Sq Ft converts an existing fireplace opening into a practical source of steady wood-fired warmth. It suits homeowners seeking cleaner combustion, useful heating coverage, and dependable comfort when electrical service is unavailable.

Key Benefits

  • Efficiently Heat Your Home – Turns an existing fireplace into an effective heat source for the surrounding living area.
  • Air-Tight Design With Ceramic Glass – Accommodates practical firewood sizes while helping each load burn steadily and remain easy to manage.
  • Get More Heat From Less Firewood – Cleaner combustion helps homeowners capture more useful warmth from every load of seasoned firewood.
  • Includes A Blower Kit – The appropriate airflow setup moves heat beyond the hearth for more consistent room comfort.
  • An Excellent Back-Up Heat Source – Useful wood heat remains available when outages interrupt the home’s primary heating equipment.
  • Save On Utility Costs – Targeted room heating reduces unnecessary energy use in unoccupied areas of the home.
  • Enjoy Longer Burn Times – Extended burn cycles reduce frequent reloads and routine fire tending throughout the day.
  • Clean-Burning Design – Cleaner combustion produces useful warmth with less smoke, ash, and wasted firewood.

Efficiently Heat Your Home

Turns an existing fireplace into an effective heat source for the surrounding living area. This makes daily operation easier while supporting dependable comfort throughout the surrounding room.

Air-Tight Design With Ceramic Glass

Accommodates practical firewood sizes while helping each load burn steadily and remain easy to manage. It supports easier operation and dependable household comfort during everyday use.

Includes A Blower Kit

The appropriate airflow setup moves heat beyond the hearth for more consistent room comfort. This makes daily operation easier while supporting dependable comfort throughout the surrounding room.

Clean-Burning Design

Cleaner combustion produces useful warmth with less smoke, ash, and wasted firewood. It also supports practical operation, dependable performance, and comfortable everyday use throughout the home.

Warranty

Manufacturer warranty coverage may apply. Review the current warranty documentation for covered components, registration requirements, exclusions, and claim terms.

What's Included

  • Osburn 3500 EPA Certified Wood Burning Fireplace Insert with Blower - Heats 2,700 Sq Ft

See How a Wood Insert Can Improve Fireplace Performance and Everyday Home Comfort

See how this wood insert can provide practical heating, efficient firewood use, and dependable backup warmth.

More Information
Osburn 3500 EPA Certified Wood Burning Fireplace Insert with Blower - Heats 2,700 Sq Ft
FeatureSpec
SKUOB03510
Weight (in lbs)540
Brand/ManufacturerOsburn
UPC773388210124
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
Top reviews
  1. Insert
    Quality
    100%
    Service
    100%
    Price
    100%
    Insert is awesome. Heats up house no problem.

    Review by

    Posted on

  2. Review
    Quality
    100%
    Service
    60%
    Price
    80%
    Service took forever but the fireplace was really nice

    Review by

    Posted on

  3. Excellent
    Price
    100%
    Service
    100%
    Quality
    100%
    This fireplace is awesome. It took a long time to arrive, but it was worth the wait. I wish I could attach pics of the finished product. I got the nickel trim, with the hammered finish wood stand, great product.

    Review by

    Posted on

  4. No issues
    Price
    100%
    Service
    100%
    Quality
    100%
    No issues. I have not had time to install the wood insert, yet. We are remodeling my son’s house, and are not quite to that point, yet. I will say the way the unit was packaged/wrapped was very good!

    Review by

    Posted on

Customer Questions
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.
Do I need a blower for my fireplace insert?
A blower is a great addition to a fireplace insert that helps boost heat output and improves efficiency by circulating warm air more effectively throughout your room. While most inserts can operate without a blower, adding one is beneficial if you want faster, more even heating. If extra heat isn’t necessary, your insert will still work well without a blower.
What is a faceplate or surround for a fireplace insert?
A faceplate, surround, or trim kit is used with fireplace inserts to cover and close the gap between the insert and the fireplace opening. It helps create a clean, finished look while ensuring a proper fit, and should be sized slightly larger than your fireplace’s width and height. Various sizes are available to match common fireplace openings for a seamless installation.
Do any wood inserts qualify for a federal tax credit?
Yes, wood-burning inserts that meet government efficiency standards and qualify for the 30% federal tax credit are clearly marked at the top of each product description on HVACDirect.com. You can also view all qualifying models in one place at https://hvacdirect.com/stoves/tax-credit-stoves.html to find the best option for your home.
Do I need a chimney liner for my wood stove or fireplace insert?
A stainless steel chimney liner kit is always recommended when installing a wood-burning fireplace insert or freestanding stove in a masonry chimney. The liner ensures a consistent and safe flow of exhaust gases, improving the draft and overall efficiency of your appliance while protecting your chimney from heat and corrosion. Using a chimney liner helps maintain safety and enhances stove performance.
What size wood insert is right for my home?
Choosing the right size wood insert depends on both your heating needs and the dimensions of your existing fireplace. Be sure to measure your fireplace’s width, height, and depth, then compare those to the minimum fireplace dimensions listed on each product page to ensure a proper fit. Generally, small inserts heat up to 1,500 sq. ft., medium inserts cover up to 2,500 sq. ft., and large inserts can heat areas larger than 2,500 sq. ft., though actual performance varies based on factors like firewood type, room layout, ceiling height, and insulation.
Can this be inserted in a wood framed fireplace?
This must be installed in a functioning masonry fireplace. If you have any further questions please feel free to give us a call! Thanks.
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.
What is the actual size of the exterior and the measurements for the inside?
Provided is the dimensions sheet for this model. If you have any further questions we recommend that you give us a call! Thanks.
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.
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.
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.
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.
Does it automatically adjust the airflow on startup and reloads?
The Osburn luckily does not have a timer on the air control for startup and reloads. That technology sounds good in theory but has had issues in the field. If you have any further questions please feel free to give us a call! Thanks.
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.
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