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Osburn 3500 Fireplace Insert OB03510
Osburn 3500 Insert. Technical drawings of the Osburn 3500 Insert. Osburn 3500 Insert image. Color photo of the Osburn 3500 Insert with different trim colors.
QUALIFIES FOR TAX CREDIT (Section 25C, US Tax Code) Osburn 3500 Insert, 110,000 Btu's, 2700 sq.ft, 540 lbs, 3.5 cubic foot Firebox, 22 Inch log, 144 CFM Blower

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QUALIFIES FOR TAX CREDIT (Section 25C, US Tax Code) Osburn 3500 Insert, 110,000 BTU's, heating for up to 2700 sqr feet, weighs 540 lbs, 22 inch log, 144 CFM Blower

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Price With Selected Options: $3,799.00

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Product Code: OB03510

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Lifetime Warranty

Door Overlay
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Door Overlay Colors*:

The door overlay is decorative trim that goes around the door.The door overlay is decorative trim that goes around the door.
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Faceplate Size*:

Trim for the Surround/Faceplate
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Trim Colors*:


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Fire Screen:

Fresh Air Adapter:

Chimney Liner Kit Sale

Chimney Liner Kits:

ALL CHIMNEY LINER KITS INCLUDE: CHIMNEY CAP, 13" x 13" TOP PLATE & STOVE ADAPTER to connect the liner to the stove or insert, 316L stainless steel, manufactures lifetime warranty, are made extra flexible and have a the best draft for your Osburn.

Chimney liner accessories:

Chimney Liner Insulation:

High temperature silicone:

Description Technical Specs Parts, Manuals, Venting, FAQs

Upgrade with an Osburn!
OSBURN Fireplace Insert OB03510

The Osburn 3500 wood insert combines power, efficiency and safety. With its amazing features and sober lines that give way to one of the largest glass surfaces in its category, this insert will blend perfectly with the architecture of your home. Its flawless design reveals all the Canadian know-how in terms of alternative heating and will quickly become the house favorite. No harsh winter can resist it!
Because each house is unique, choose the door overlay, the faceplate and the trims that suit you!

The Osburn 3500 must be installed into a masonry fireplace.
The Osburn fireplace insert model number is OB03510.
The Osburn fireplace insert puts out 110,000 BTU/h and has a heating capacity of 1100 - 2,700 square feet.
The firebox volume: 3.5 cubic feet.
The Osburn will accept logs up to 22 inches long.
The glass door has a Self-cleaning glass system.
The optimum efficiency for the Osburn OB03510 is 77 %.
The blower assembly of the Osburn OB03510 (144 CFM) is equipped with a heat sensor and a switch that can be set to automatic, manual or OFF position
A wood burning fireplace insert that defines the new standards for contemporary look and performance.
The Osburn looks like a fireplace, but has all the advantages of an insert.
The Osburn fireplace insert has a face plate and blower assembly that was developed to allow a flush finish with the masonry fireplace.
Cast iron was selected as the material of choice for the Osburn OB03510 clean and modern look.
You can install the Osburn into larger openings using one of the optional sheet metal backing plates.
The Osburn fireplace insert will surely become the focal point of the room.
The Osburn has a flat front.
The Osburn will be flush with your fireplace.
The Osburn does not stick out like most fireplace inserts.
If you are looking for a fireplace insert that is flush with your fireplace then the Osburn 3500 is perfect.
The Osburn Insert may qualify for some government incentives.
The fireplace insert is tested by Warnock as per applicable standards (EPA/CSA/UL/ULC and/or others).

Average Rating: Average Rating: 1 of 5 1 of 5 Total Reviews: 1 Write a review »

  1 of 1 people found the following review helpful:
1 of 5 Wrong surround January 26, 2023
Reviewer: Mike Smith from Athens , TN United States  
I bought my unit in November and have had it installed for 2 months works great!! But what I have an issue with is I bought it from hearth and patio in Knoxville Tennessee. They have sent me the wrong surround 3 times now and say that it is because Osburn keeps sending wrong item. Then I get well we have to wait to hear from a representative from Osburn. I have been waiting over 2 months now and they say it’s your fault. Wondering what is going on. A bit ridiculous if you ask me

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Osburn's were first sold to the public in 1979 and at that time they were manufactured in Victoria, British
Columbia, Canada. Today Osburn's are made in Quebec Canada. Osburn was the first ever North American manufacturer to produce a wood stove
in compliance with Oregon State's strict air emission standards.
OsburnWoodStoves.com is an authorized leading etailer of Osburn Heating Appliances.
The manufacture website is Osburn-mfg.com
"Don't just replace your old wood stove, pellet stove or fireplace insert, upgrade it with an Osburn"

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