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- Description
- Which Wood Stove Do I Need?
- Specifications
- Manuals / Catalogs
- FAQ
- Shipping / Freight / Return Info
Osburn 3500 wood stove: Osburn’s biggest stove for large homes and hard winters
The Osburn 3500 wood stove is a freestanding wood stove for indoors. Osburn rates it for 1,000 to 2,700 square feet, so it can heat a large home. Its large firebox holds up to 50 pounds of wood. It stands on the floor on a hearth pad, the fireproof panel that goes under a stove, and vents up through a stovepipe into a chimney.
Load it up and turn the air down, and it burns up to 10 hours. At full burn it puts out up to 110,000 BTU. The blower, a quiet fan that pushes the heat out into the room, comes with it, along with the sensor that switches it on when the stove is hot. It is a non catalytic stove, so there is no catalyst part to replace, just a clean burning firebox. It burns dry, seasoned firewood. You pick the door overlay on the page, the trim around the glass door, in black or brushed nickel. An outside air kit, which feeds the fire air from outdoors, is optional. You can add a firescreen for open door fires and a glass ash lip that catches ash and sparks in front of the door. Need a smaller stove? See the Osburn 2000 wood stove. The Osburn 3500 wood stove ships free from My Cozy Outdoors with No Sales Tax (except WY) and the full manufacturer warranty.
Which Wood Stove Do I Need?
Fireplace Finder
Answer a few quick questions and we’ll show you the right kind of fireplace for your home or backyard, plus the models that fit.
Where will your fireplace go?
What kind of fire do you want outside?
How do you want it built?
Outdoor fireplaces come two ways: a finished piece you set in place, or a firebox that gets built into a wall.
How big a fireplace do you picture?
Measured by the width of the fire opening, or of the whole unit for ready-made pieces.
What kind of fire do you want?
Not sure yet? Pick “Help Me Choose” and we’ll ask two easy questions.
Do you have natural gas at home, or would you use a propane tank?
Which sounds most like you?
What type of unit do you picture?
Can a vent pipe go through an outside wall or the roof?
Gas fireplaces either vent outside (direct vent) or need no vent at all (vent-free).
What matters most to you?
How big is the space you want to heat?
Enter the square feet of the room, or of the open area the fire will warm.
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What are your winters like?
How tall are the ceilings?
How well insulated is the space?
Is it an open floor plan?
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Which look do you like best?
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Specifications
SKU: OB03500
| 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) |
| Optimum overall efficiency | 77 % |
| Optimum heat transfer efficiency | 75 % |
| Average particulate emissions rate | 1.6 g/h |
| Average CO | 73 g/h |
Manuals / Catalogs
Osburn 3500 wood stove install & owner’s manual
Wood stove manual | Safety notifications & general information
FAQ
How large a space can the Osburn 3500 heat?
It is rated for a recommended heating area of 1,000 to 2,700 square feet, with a maximum heat output of 110,000 BTU/h on dry cordwood. That makes it one of the most powerful Osburn wood stoves we carry, built specifically for spacious homes and harsh winters.
How long will it burn on one load of wood?
Maximum burn time is 10 hours. The 3.5 cubic foot firebox holds up to 50 lb of cordwood, so an evening load at a low burn setting can still be producing heat the next morning. Osburn recommends dry cordwood cut to 16 inches for the rated performance.
Is a blower included with this stove?
Yes. The 3500 ships with a blower, a thermodisc and an airmate, which Osburn includes for optimal heat distribution rather than selling the fan as an extra. That combination helps move the stove’s substantial heat output through the room instead of letting it pool around the unit.
Is this a catalytic or non-catalytic wood stove?
Non-catalytic. Osburn pairs a user-friendly, non-catalytic combustion technology with a significant reduction in fuel consumption, and it still achieves an average particulate emissions rate of just 1.6 g/h. There is no catalytic combustor element in this design, which keeps day-to-day operation simple.
Can I connect outside combustion air?
Yes. A 5-inch fresh air intake kit, a 4-foot insulated flex pipe and a register with an airtight damper are all offered as add-ons under Fresh Air Intake on this page. Whether outside air is required for your installation depends on your home and local code, so follow the owner’s manual.
What can I customize when ordering?
The door overlay is a required choice on this page, in black or brushed nickel. A rigid firescreen and a glass ash lip are also available as on-page options, so you can configure the stove’s look and accessories before adding it to your cart.
How efficient is this stove?
The published figures on dry cordwood are 71% average overall efficiency (HHV), 77% optimum overall efficiency and 75% optimum heat transfer efficiency, with an overall heat output rate spanning 17,200 to 57,800 BTU/h. Those numbers assume the recommended fuel: dry, seasoned cordwood.
Shipping / Freight / Return Info
Same-Day / 24 hour shipping
Same-Day/24 hour shipping - If we have the product in stock, we can ship
same day if ordered before 12pm Monday - Friday (CST).
Please follow these very important steps when it comes to Freight Items that are damaged or missing
Freight Claims Policy
Please follow these very important steps when Returning Items. Contact our team.
Return Merchandise Authorization Policy
Customer Reviews
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What Our Customers Say
D
A sauna turns your garden into a spa oasis. We debated it for a while, but after renovating our house, we pulled the trigger and bought a sauna from Norse Steam and Maya. She was always super responsive and helpful throughout the process. Don't kid yourself, getting a really nice sauna is not that easy. Sizing and heating need to be figured out, as does the building, but we have always had a helpful partner on our side. She never upsold us on anything we didn't need, and we got some nice freebies when the sauna was delivered. And now we can really enjoy every moment in our garden.
KF
I'm really happy with my sauna purchase. Maya gave above and beyond excellent customer service. She wasn't pushy and gave impressive followup after the delivery to make sure everything was just right.
DE
I enjoy my FD2 Sauna with Red Light, Infrared and radiant heat. Use it 5x a week and my post workout soreness is minimal and sleep great. Maya at Norse Steam was excellent to work with.
B
We purchased the 3-person sauna for our outdoor garden. We chose the cube sauna for the aesthetic and could not be happier.
I assembled by myself except for the 2 large panels (requires a few people). Instructions were good - took me two partial Saturdays to complete and a few hours to unpack and organize in advance of assembly. Had my elec. add a NEMA enclosure on the back for the controller and power for lights and a 2nd panel for the wireless control.
Customer service was excellent
MP
Awesome Sauna and Awesome Company and Experience purchasing it from Maya!
After much research I chose the Finnmark FD-2 and it has met and exceeded all my expectations! Easy to assemble and it functions great - just as advertised. I highly recommend it for home use!
EA
Recently purchased the Finnmark one person after much research. Extremely happy with it and the ordering process. Maya was very responsive and helpful during the process and keeping us updated while we waited for shipment. There were several places I could have ordered this, but i chose Norse Steam based on the communication and customer service which was fantastic. The shipment was also excellent. The setup was pretty seamless for two people - but the best part is the sauna experience 10/10
G
Maya is amazing - super helpful and responsive. Looked at many stores, these guys have the best prices and service. Highly recommend
GR
Norse Steam, and specifically Maya, were extremely helpful as I was making the decision for our Sauna. I was able to get all of the necessary details to make a decision as construction was happening in my backyard to make space for it.
We absolutely love the CL7G. It is extremely comfortable for 6 people (can fit more less comfortably). The Thermory Spruce and Aspen in the interior smells great. The lighting is lovely. We paired the CL7G with the Harvia Spirit 10.5kw.
RS
Had great experience shopping at Norse Steam for the new heater. They had very good deal, with rocks. Customer service was good, and responded very fast with my questions. Received the heater, and it looks good, and the quality seem to be great. Will install soon, and am very excited to start experiencing sauna the way it ment to be
O
positive purchase experience - Harvia Legend 150 SL woodstove
thanks Norse Steam for flawless transaction - I got instant replies on my questions, received competitive price on the wood stove and got it delivered within two weeks!
Can highly recommend Norse Steam for others.
JR
Smoking Hot Tub!
I got the Norse Steam SaunaLife wood-fired hot tub, the S4N model, and its been seriously great. It heats up quicker than I expected, usually around an hour and a half, and once its hot, it stays that way for a good long while. The wood-fired system is simple to use, and honestly kind of fun.
The tub itself feels solid and well put together. The thermo-spruce exterior looks beautiful in person, and the fiberglass interior is smooth, deep, and easy to clean. Its the kind of setup that just works without a bunch of fuss, which I really appreciate.
Also, the team at Norse Steam was genuinely great to work with. Super helpful, quick to respond, and made the process really easy from start to finish. It felt like they actually cared that I was happy with it. The tub has totally become a go-to way to unwind, and I wouldnt change a thing.
S
Maya was so knowledgeable and responsive
Maya was so knowledgeable and responsive. She helped me understand the product options and found a fantastic solution that fit our needs. Her follow through was very helpful and made us comfortable with our decision. We are extremely happy with the end result!
W
Great service
I recently purchased the Harvia Club sauna equipment, and I am thoroughly impressed with both the product and the customer service experience. The heaters robust performance and durable stainless steel construction make it ideal for larger sauna spaces, providing consistent heat and a relaxing environment. Its compatibility with advanced controls ensures a personalized sauna experience every time.
The customer service team was exceptional, prompt, knowledgeable, and helpful throughout the purchase process. They ensured smooth delivery and provided clear guidance on installation and operation. Overall, I highly recommend Harvia Club for anyone seeking premium-quality sauna equipment backed by excellent support!
BT
Great Sauna & Purchase Experience
Great experience purchasing Finnmark FD-2 from Norse Steam. Good communication and easy to assemble. Temperature increases quickly (30 minutes or less to 140) and maintains well. So far this has been a great purchase.
M
Great sauna and great customer service
We purchased the Finnmark SD-1 sauna. Maya was extremely helpful with the purchase. We had an issue with the sauna not reaching the maximum temperature, and Maya connected us with the appropriate technician that explained how to correct the issue. The sauna now heats to the maximum temperature (170 degrees) in less than an hour, and it is a great unit. We are very happy with it, and we would definitely purchase from NorseSteam if we needed any other items.
JK
Sauna Review
I recently purchased a sauna from Norse Steam, and I couldn't be more impressed with the entire experience. From start to finish, their customer service was exceptional, and Maya deserves special recognition for her outstanding support!
Maya was incredibly knowledgeable and patient, answering all my questions about the sauna features, installation process, and maintenance. She went above and beyond to ensure I selected the perfect model for my home. Even after the purchase, Maya followed up to make sure everything was running smoothly and that I was satisfied with my sauna.
The sauna itself is top-notch beautifully designed, durable, and easy to use. It's clear that Norse Steam takes pride in the quality of their products and their commitment to customer satisfaction.
If you're considering a sauna, I wholeheartedly recommend Norse Steam. With their excellent customer service and high-quality products, you're in great hands. Thank you, Maya, and the entire Norse Steam team for a fantastic experience!
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