Introducing the Osburn 3500 Wood Burning Insert with the exclusive 5.5" x 25' Forever Flex Liner Kit – a match made in hearth heaven. As the chill of winter approaches, consider this your invitation to embrace a new level of comfort and elegance in your living space. With the Osburn 3500, you're not just buying a wood insert; you're investing in the heart of your home, where warmth meets style, and ambiance intertwines with practicality.
Crafted with meticulous attention to detail, the Osburn 3500 is a testament to the marriage of aesthetics and efficiency. With its large glass viewing area, you'll be captivated by the dance of flames, adding a touch of enchantment to your evenings. The included Forever Flex Liner Kit is more than a companion; it's your assurance of a smooth, hassle-free installation, ensuring that your new wood insert becomes a part of your home with minimal disruption. Whether you're seeking respite from the cold or a picturesque backdrop for cherished memories, the Osburn 3500 delivers with grace.
- Exceptional Heating: Enjoy powerful heat output that keeps you warm even in the harshest winters.
- Aesthetic Upgrade: Elevate your interior with the mesmerizing sight of a real wood fire.
- Energy Efficiency: Harness the energy of wood to reduce heating costs and environmental impact.
- Customized Comfort: Adjust the heat level to create a cozy atmosphere tailored to your preference.
- Easy Operation: User-friendly controls make managing your fire a breeze.
- Cleaner Burning: Advanced combustion technology minimizes emissions and maximizes efficiency.
- Reliable Installation: The included Forever Flex Liner Kit guarantees a seamless setup process.
Required to complete the woodstove:
- Faceplate Trim
- Door Overlay
Included items: one Osburn 3500 wood insert (OB03510), one connector with Forever Flex 5.5"Ø x 25' flexible liner, one 13" x 13" top plate and one chimney cap with screen, entirely made of stainless steel.
- Fuel type: Dry cordwood (16" recommended)
- Recommended heating area-ft²: 1000- 2,700
- Overall firebox volume-ft³: 3.5
- EPA loading volume-ft³: 2.84
- Maximum burn time: 10 h
- Maximum heat output-dry cordwood: 110,000 BTU/h (32.2 kW)
- Overall heat output rate : 18,100 BTU/h (5.3 kW) to 49,500 BTU/h (14.5 kW)
- Average overall efficiency (dry cordwood) : 71% (HHV) 76% (LHV)
- Optimum overall efficiency: 77%
- Optimum heat transfer efficiency: 76%
- Average particulate emissions rate: 1.32 g/h
- Average CO: 92 g/h
Values are as measured per test method, except for the recommended heating area, firebox volume, maximum burn time, and maximum heat output.
Recommended heating area and maximum burn time may vary subject to location in the home, chimney draft, heat loss factors, climate, fuel type, and other variables. 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.
The maximum heat output (dry cordwood) is based on a loading density varying between 15 lb/ft³ and 20 lb/ft³ and reloading intervals ranging from 60 to 120 minutes. Other performances are based on a fuel load prescribed by the standard without any reloading between start and finish. The specified loading density varies between 7 lb/ft³ and 12 lb/ft³. The moisture content is between 19% and 25%.
As measured per CSA B415.1-10 stack loss method.
- Higher Heating Value of the fuel.
- Lower Heating Value of the fuel.
Performances are based on a fuel load prescribed by the standard at 7 lb/ft³ and with a moisture content between 19% and 25%.
Optimum overall efficiency at a specific burn rate (LHV).
The optimum heat transfer efficiency is for the low burn rate (using HHV) and represents the appliance’s ability to convert the energy contained in the wood logs into energy transferred to the room in the form of heat and does not take into account the chemical losses during combustion.
This appliance is officially tested and certified by an independent agency.
|High-efficiency certified appliance||Yes, EPA 2020 approved|
|Maximum log length||22"|
|Log positioning||Loading over width|
|Flue outlet diameter||6"|
|Type of chimney||Liner - ULC-S635, CAN/ULC-S640, UL1777|
|Minimum chimney height (feet)||15'|
|Approved for a mobile home installation||No|
|Shipping Weight||540 lb. (245 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)||144|
|Overall dimension (Height)||24 7/8"|
|Overall dimension (Width)||30 3/8"|
|Overall dimension (Depth)||29"|
|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|
|Steel thickness – body||3/16"|
|Steel thickness – top||3/8"|
|Fireplace opening – minimum (Height)||26 1/4"|
|Fireplace opening – minimum (Width)||31"|
|Fireplace opening – minimum (Depth)||18 3/8"|
|USA standard (emissions)||EPA|
|Canadian Standard (emissions)||CSA B415.1-10|
|USA standard (safety)||UL 1482, UL 737|
|Canadian standard (safety)||ULC S628|
|Tested and listed as per applicable standards||By an accredited laboratory (CAN/USA)|
Minimum clearances to combustibles*
(Data expressed in inches. 1 inch = 25.4 mm)
|Clearance – top (measured from the platform on which the appliance is installed)**||84"||84"|
|Clearance – combustible side mantle to unit||9"||9"|
|Clearance – combustible top mantle to unit||27"||27"|
|Clearance – combustible side wall to unit||19"||19"|
|Clearance – top shelf to unit||27"||27"|
* The information given on the certification label affixed to the appliance always overrides the information published in any other media (owner's manual, catalogues, flyers, magazines and/or web sites).
** Some appliances have been tested with a low ceiling. Before setting up your unit, refer to the installation manual.
About The Manufacturer:
Osburn is a North American manufacturer of quality wood and pellet heating
appliances, that was founded in 1979. The company mainly specializes in wood stoves, pellet stoves, wood fireplaces, wood inserts, and their related accessories. Osburn is widely known for the high-efficiency and performance of its products, for those looking to replace their traditional fireplaces with more sophisticated wood and pellet heating systems for their homes. The company also stocks up on Osburn gas fireplace parts and maintenance products.
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