Fireplace air distribution system

Abstract

A combustion air system for fireplaces capable of introducing outside air to the firebox of a fireplace in a position for efficient distribution within the firebox. The system includes both manual and thermostatic operation for controlling the quantity of combustion air reaching the firebox. The system employs the existing ash trap as the source of combustion air thereby allowing the installation of this improved combustion air system without structural modification of the firebox and without interference with the normal use of the ash trap. The system includes a domed chamber which is substituted for the ash trap door and a draft controlling damper for controlling the quantity of combustion air. The damper is controlled by a manual push rod extending from the exterior of the fireplace to the firebox and engages the same damper. The control rod is enclosed within a tubular housing which further encloses a heat responsive spring acting as a thermostat to open the damper as the temperature decreases and close the damper as the heat increases in order to provide a stoking effect upon the fire in the firebox.

Dependencies are inferred from the claim text.