Osburn 3500 EPA Certified Freestanding Extra Large Wood Stove with Blower
Osburn 3500 EPA Certified Freestanding Extra Large Wood Stove with Blower
SKU: SKU: OB03500
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Manufacturer's Warranty Included
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The Osburn 3500 EPA Certified Freestanding Extra Large Wood Stove with Blower delivers powerful, efficient heating for larger homes and open living spaces. Producing up to 110,000 BTU/h, this high-performance wood-burning stove heats areas ranging from 1,000 to 2,700 square feet. Its spacious 3.5 cubic foot firebox accommodates logs up to 22 inches long and provides a maximum burn time of 10 hours under optimal conditions. Featuring EPA 2020-certified non-catalytic combustion with average particulate emissions of just 1.6 g/h, the Osburn 3500 delivers cleaner, more efficient wood heating. An included 130 CFM blower helps distribute warm air throughout the room for enhanced comfort.
Built for durability and dependable performance, the Osburn 3500 features a heavy-duty steel body, reinforced 5/16-inch steel top, and refractory brick-lined firebox for improved heat retention and distribution. Its advanced stainless-steel secondary air system promotes more complete combustion and better fuel efficiency, while the C-Cast baffle supports efficient burning. The large ceramic glass viewing window, surrounded by a durable cast iron door frame, offers an impressive view of the flames. An integrated air-wash system helps reduce soot buildup on the glass, combining traditional wood-burning ambiance with modern heating technology.
Measuring 28.875" W x 34.75" H x 33.5" D, the Osburn 3500 Extra Large Wood Stove features a sturdy pedestal design that complements a variety of residential interiors. Its 6-inch flue outlet requires a compatible chimney system with a minimum height of 15 feet. Approved for alcove installations and mobile homes when equipped with the required fresh air intake, this versatile freestanding wood stove offers flexible installation options when installed according to manufacturer specifications. Backed by a limited lifetime warranty, the Osburn 3500 combines exceptional heating capacity, durable construction, and efficient combustion for lasting comfort.
Included
- Osburn 3500 Wood Burning Stove
- Pedestal with Ash Drawer
- Blower (130 CFM)
- Owner's Manual
Required Accessories
- Door Overlay
Optional Accessories
- Rigid Firescreen
- 5" Fresh Air Intake Kit for Wood Stove on Pedestal
- 5" Fresh Air Intake Register with Airtight Damper
- 5" x 4' Insulated Flex Pipe for Fresh Air Intake
- Glass Ash Lip
Features
- Blower included, up to 130 CFM
- Heats 1,000 to 2,700 sq ft with up to 110,000 BTU/h
- 3.5 cu ft firebox that takes logs up to 22"
- Maximum burn time of 10 hours
- EPA 2020 certified, non-catalytic, 1.6 g/h average particulate emissions
- Ceramic glass door with cast iron frame and glass air-wash system
- Approved for alcove and mobile home installation
- 5/16" steel top
- Limited lifetime warranty
Specifications
| Combustion technology | Non-catalytic |
| High-efficiency certified appliance | Yes, EPA 2020 approved |
| Maximum log length | 22" |
| Log positioning | Loading over width and over depth |
| Chimney diameter | 6" |
| Flue outlet diameter | 6" |
| Type of chimney | CAN/ULC S629, UL 103 HT (2100 °F) |
| Minimum chimney height (feet) | 15' |
| Baffle type | C-Cast or equivalent |
| Approved for an alcove installation | Yes |
| Approved for a mobile home installation | Yes, with fresh air intake |
| Shipping Weight | 549 lb (249 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) | 130 |
| Overall dimension (Height) | 34 3/4" |
| Overall dimension (Width) | 28 7/8" |
| Overall dimension (Depth) | 33 1/2" |
| 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 |
| Model | Pedestal |
| Steel thickness – body | 3/16" |
| Steel thickness – top | 5/16" |
| USA standard (emissions) | EPA |
| Canadian Standard (emissions) | CSA B415.1-10 |
| USA standard (safety) | UL 1482, UL 737 |
| Canadian standard (safety) | ULC S627 |
| Tested and listed as per applicable standards | By an accredited laboratory (CAN/USA) |
| Warranty | Limited lifetime |
Appliance Performance
| Fuel type | Dry cordwood (16" recommended) | |
| Recommended heating area-ft² | 1,000 - 2,700 | |
| Overall firebox volume-ft³ | 3.5 | |
| EPA loading volume-ft³ | 2.88 | |
| Maximum burn time | 10 h | |
| Maximum heat output-dry cordwood | 110,000 BTU/h (32.2 kW) | |
| Overall heat output rate < | 17,200 BTU/h (5.0 kW) to 57,800 BTU/h (16.9 kW) | |
| Average overall efficiency (dry cordwood) | 71 % (HHV) | 76 % (LHV) |
| Optimum overall efficiency | 77 % | |
| Optimum heat transfer efficiency | 75 % | |
| Average particulate emissions rate | 1.6 g/h | |
| Average CO | 73 g/h | |
Clearance
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Minimum clearances to combustibles* (Data expressed in inches. 1 inch = 25.4 mm) |
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| Canada | United-States | |||
| Single wall pipe | Double wall pipe | Single wall pipe | Double wall pipe | |
| Clearance – back wall | 13 1/4" | 6" | 13" | 6" |
| Clearance - corner | 7 1/4" | 7" | 7 1/4" | 7" |
| Clearance – side wall | 14" | 14" | 14" | 14" |
| Clearance – top (measured from the platform on which the appliance is installed)** | 84" | 84" | 84" | 84" |
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* The information given on the certification label affixed to the appliance always overrides the information published in any other media (owner's manual, catalogs, flyers, magazines, and/or websites). |
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** Some appliances have been tested with a low ceiling. Before setting up your unit, refer to the installation manual. |
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Technical Drawings & Dimensions
Warranty

The warranty of the manufacturer extends only to the original retail purchaser and is not transferable. This warranty covers brand-new products only, which have not been altered, modified, or repaired since shipment from the factory. Proof of purchase (dated bill of sale), model name, and serial number must be supplied when making any warranty claim to your OSBURN dealer. This warranty applies to normal residential use only. This warranty is void if the unit is used to burn material other than cordwood (for which the unit is not certified by EPA) and void if not operated according to the owner's manual. Damages caused by misuse, abuse, improper installation, lack of maintenance, over-firing, negligence or accident during transportation, power failures, downdrafts, venting problems, or under-estimated heating areas are not covered by this warranty. The recommended heated area for a given appliance is defined by the manufacturer as its capacity to maintain a minimum acceptable temperature in the designated area in case of a power failure.
This warranty does not cover any scratch, corrosion, distortion, or discoloration. Any defect or damage caused by the use of unauthorized or other than original parts voids this warranty. An authorized qualified technician must perform the installation in accordance with the instructions supplied with this product and all local and national building codes. Any service call related to an improper installation is not covered by this warranty.
About The Manufacturer

Osburn is a Canadian hearth brand manufactured by Stove Builder International (SBI), a company specializing in residential heating appliances. Made in Québec, Osburn products reflect the region’s long experience with wood heating and cold-weather needs. The lineup includes wood stoves, fireplace inserts, wood fireplaces, cookstoves, and pellet stoves. Osburn designs appliances for a range of homes, with models offering different heating capacities, styles, and installation options. Many models use non-catalytic combustion technology to deliver efficient heat with reduced emissions. The company also develops heat-management solutions that can help distribute fireplace heat to other areas of the home. With a broad product range and Canadian manufacturing roots, Osburn brings together practical heating performance and considered design.
Our Shipping Policy
Order Processing Time
Orders are typically processed within 1–2 business days (Monday–Friday, excluding holidays).
Orders placed after 5:00 PM EST will begin processing on the next business day.
Once your order is processed and prepared for shipment, you will receive a shipping confirmation email with tracking information.
Please note that certain products, including oversized, custom-made, special-order, or high-demand items, may require additional handling or production time. If your order is expected to ship later than the advertised timeframe, our customer service team will contact you via email or phone.
Shipping Rates & Delivery Estimates
We offer Free Standard Shipping on all orders within the contiguous United States.
Estimated delivery timelines:
- Standard products: typically delivered within 2–5 business days after shipment
- Total estimated delivery time: approximately 3–7 business days from the order date
Delivery times are estimates only and may vary due to carrier delays, weather conditions, product availability, holidays, or other unforeseen circumstances.
While we strive to meet all estimated delivery timelines, delays may occasionally occur due to weather, carrier issues, holidays, manufacturer backorders, or other unforeseen circumstances.
Shipping Destinations
We currently ship to customers within the United States.
Free shipping applies to the contiguous United States only (Lower 48 states and Washington D.C.).
For shipments to:
- Alaska
- Hawaii
- U.S. Territories
please contact us before placing your order for a shipping quote and estimated transit time.
We do not currently offer international shipping.
Freight & Oversized Deliveries
Certain large or heavy items such as fireplaces, fire pits, mantels, and outdoor heating products are shipped via freight carriers.
Freight deliveries may include:
- Curbside delivery service
- Delivery appointment scheduling
- Signature requirement upon delivery
An adult must be available to receive and inspect freight shipments at the time of delivery.
Additional delivery services such as liftgate service or inside delivery may be available upon request depending on the carrier and delivery location.
Shipment Inspection & Damages
Please inspect all shipments carefully upon delivery.
If your shipment arrives visibly damaged:
- Note the damage with the carrier before signing the delivery receipt
- Take photos of the product and packaging
- Contact us immediately at sales@ridgeflame.com
If concealed damage is discovered after delivery, please notify us within 48 hours of receiving the shipment and provide photos of the packaging and damaged item.
Please retain all original packaging materials until the claim is resolved.
We will work directly with the carrier and manufacturer to help resolve shipping damage claims and provide an appropriate solution whenever possible.
Shipment Confirmation & Tracking
Once your order ships, you will receive a shipment confirmation email containing tracking information.
Tracking numbers may take 24–48 hours to become active after shipment.
If you have not received tracking information within several business days after your order ships, please contact our support team.
Incorrect Shipping Information
Customers are responsible for providing accurate shipping information at checkout.
If an incorrect or incomplete shipping address is provided, delivery delays, additional carrier fees, or returned shipments may occur.
Please contact us immediately if you notice an error in your shipping address after placing your order.
Order Cancellations
Orders may be canceled without penalty before shipment processing begins or before a shipping label or Bill of Lading has been created.
Custom-made, made-to-order, or special-order products cannot be canceled once production or processing has started.
If you need assistance with an order cancellation request, please contact us as soon as possible.
Returns & Refunds
Eligible non-custom items may generally be returned within 30 days of delivery unless otherwise stated on the product page.
Returned items must:
- Be unused and in original condition
- Include original packaging and accessories
- Be returned in resellable condition
Return shipping costs and applicable restocking fees may apply.
Custom-made, made-to-order, clearance, or final-sale items may not be eligible for return.
Please review our Return & Refund Policy for complete details before initiating a return.
Shipping Carriers
We partner with trusted shipping providers including:
- FedEx
- UPS
- USPS
- Certified Freight Carriers
Carrier selection may vary depending on the product size, destination, and shipping method.
110% Best Price Guarantee
At our store, we are committed to offering exceptional value and competitive pricing on every product we sell. If you find the same item available at a lower price from another authorized online retailer, we'll not only match it, we'll beat it by 10% of the price difference.
To request a price match, simply send us a link to the product on our website along with a link to the competitor's listing. Our team will review your request and, in most cases, respond within one business day.
Eligibility Requirements
To qualify for our 110% Best Price Guarantee:
- The product must be identical in brand, model, size, and specifications.
- The item must be currently in stock and available for purchase from both retailers.
- The competitor must be an authorized online retailer of the product.
- The comparison price must include applicable shipping charges. Sales tax is excluded from price match calculations.
- The competitor's advertised price must comply with the manufacturer's pricing policies.
Exclusions
The following are not eligible for price matching:
- Promotional offers, rebates, coupons, or buy-one-get-one-free deals
- Auction, marketplace, liquidation, or discount websites (including eBay, Overstock, Amazon marketplace sellers, etc.)
- Retail stores with in-store-only pricing
- Pricing errors, clearance sales, or special limited-time offers
- Brands or manufacturers excluded from our Best Price Guarantee program
If you have any questions regarding eligibility or excluded brands, please contact us. We are always happy to help.
Please inform us of any damage or missing parts within 48 hours of receiving your delivery. Include clear photos of the damage and keep the original boxes and all protective packaging materials.
For the smoothest experience, we strongly recommend inspecting your shipment while the delivery driver is present. If you discover damaged items, refuse the delivery or note the damage on the delivery receipt.
If you cannot inspect the items with the driver present but notice damage to the boxes, please note this on the delivery receipt and inspect your items as soon as possible.
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Buy with Confidence. Choose an Authorized Dealer.
When you shop with Ridge Flame, you can buy with confidence knowing you're purchasing from an authorized dealer. Every product is backed by the full manufacturer’s warranty, ensuring genuine products, reliable protection, and long term peace of mind. We never source from unauthorized channels or grey market suppliers. Instead, we provide authentic products, competitive pricing, and dedicated customer support every step of the way, from product selection and ordering to installation guidance and after sales assistance.
Why Buy From Ridge Flame?
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Authorized Dealer
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Free Shipping
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Easy Returns
Need to return the merchandise? We accept returns for 30 days from the date of delivery.
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110% Best Price Guarantee
Found a lower advertised price? We'll not only match it, we'll beat it by 10% whenever eligible.
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Expert Customer Support
From product selection to post-purchase assistance, our fireplace specialists are here to help every step of the way.