Double walled fireplace insert and method for loading from the outside
This patent describes a method of loading firewood into an interior firebox of a double walled fireplace insert comprising an inner firebox containing a rear wall, side walls, a top wall and a bottom wall and an outer shell containing a rear wall, side walls, a top wall, a bottom wall, and a front wall wherein the insert is provided with convection air channels between the adjacent walls of the inner firebox and the outer shell, wherein the rear wall of the inner firebox has a swinging rear door, and the rear wall of the outer shell has a hinged rear door to allow the inner rear door to swing open, and a vertical masonry chimney is built on the outside of a building in which the fireplace insert is installed, wherein the chimney has a door opening in its lower portion for allowing access to the two rear doors so they may swing open to load firewood into the firebox, as well as for cleaning out ashes and cinders that may be formed, wherein a lock mechanism is provided for the rear door of the outer shell to prevent unauthorized entry by unknown persons wherein the rear door of the outer shell is also provided with thermal insulation to reduce heat loss from the inner firebox and a thermal door gasket to prevent cool outside air from mixing with the convection air that flows around the convection air channels.
- Assignee:
- NOV; NOV-89-044311; EDB-89-046944
- Patent Number(s):
- US 4787365
- OSTI ID:
- 6234944
- Country of Publication:
- United States
- Language:
- English
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