Osburn 2000 Wood Burning Fireplace Insert

None of our woodburning inserts are listed for installation inside a manufactured/pre-fab unit, so, yes, the current unit would need to be removed and a new one installed in its place.  Please note, however, that this will almost certainly also require a complete replacement of the chimney components. 

Mantel clearances are page 30 of the manual and the surround clearances are on pages 35 and 36. You can view the manual here.

Both are actually correct, though of course we understand why this would be confusing.  The 32,000 BTU output rating was achieved via EPA testing, which requires a specific kind of wood.  Meanwhile, the 75,000 BTU output was a result of testing by the manufacturer with their choice of fuel.   Per the manufacturer, "The EPA test fuel is dimensional Douglas fir pieces stapled together into cribs with air spaces between. We also test using the same procedure except using split hardwood firewood to reflect real-world heat output. This insert is not intended to operate at its peak heat output continuously."  

Here is the 32" x 50" plate for the Osburn 2000.

The regular faceplate panel measures 44"w  x  29"h  x  1/2" return. The large faceplate panel measures 50"w  x  32"h  x  1/2" return.

Per the manufacturer's installation instructions found here on page 27, it states, " INSTALLATION INTO AN EXISTING FACTORY-BUILT ZERO-CLEARANCE FIREPLACE: It is possible to install a wood insert into an existing factory-built zero-clearance fireplace. However, there currently exists no UL or ULC standard specific to that type of installation. The factory-built zero clearance fireplace must be listed; that is, safety certified by an accredited certification agency such as UL/ULC, Omni, or Intertek). It must be suitable for use with solid fuel and nothing in the owner’s manual must specifically prohibit the installation of a fireplace insert. When in doubt, check with the fireplace manufacturer. The installation of the zero-clearance fireplace MUST be thoroughly inspected by a qualified person to ensure that it still meets the manufacturer’s specifications. The chimney must be at least 1" (25 mm) larger in diameter than the stainless steel liner that will run from the insert flue collar to the top of the chimney termination. 

The 8-hour burn time is the time that is based on the testing used to certify the appliance. The 8 hours is referencing the time that 40 pounds of wood were used at the testing facility.

Pulling the handle out will increase the air supply to the fire.

The firebox measures 21" W x 11 7/8" H x 16 3/4" D. The specifications also state 2.4 cubic feet.

This is not a zero clearance model and it is only suitable for installation inside an existing brick/masonry fireplace.  It cannot be modified to be installed in the manner you describe.  However, we do have a full selection of built-in stove type models that are zero clearance and you can see those here.

The manufacturer does not provide a decibel rating for the fan motor.  We would say it is a noticeable humming, but not necessarily what we would consider noisy to a distracting degree. 

You can use this insert without the blower, however, the cord for the blower is installed on the front of the appliance and can be plugged into an outlet on the wall within 6 feet of the appliance. It is recommended to use the blower while the appliance is in operation. 

The Osborn 1700 is a smaller option.

A grate is not recommended for this appliance. The wood should be stacked directly on the firebox floor.

The cord for the fan will need to run across the hearth and plugged into the nearest outlet.

No, this insert should be installed inside a brick/masonry fireplace with a functional, operational masonry chimney.

The kit includes one 25' x 6" flexible stainless steel liner and one 6" flexible insert connector for venting it up through the existing masonry chimney.

Likely not, as this insert will only have 4 5/8 inches of room when the insert is installed at minimum allowable depth. You can see this illustrated on page 8 of the installation manual.

Dimensions can be found on page 8 of the manual here. It is a non-catalytic wood insert.

The Superior EPA certified zero clearance fireplaces can be installed in mobile homes as long as they are anchored and their mobile specific installation guidelines are followed. These standards will be listed in the manual on each product page.

Emissions for the Osburn 2000 insert are 3.9 grams/hour.

The full dimensions of the insert are 26.5" deep, 25 5/8" wide without the faceplate, and 23 1/8" high without the faceplate. The faceplate dimensions will be dependent on the faceplate chosen at the time of purchase.

This unit has a maximum output of 32,200 BTU's.