Patent ID: 8011359

Claim:
A smoke arresting unit useful for arresting and discharging smoke escaping from a furnace chamber of a wood burning furnace equipped with a furnace chimney, a furnace door and an electronically regulated furnace fan for fanning burning embers when the furnace door is closed and stops the fanning of the burning wood embers when the furnace door is opened, said smoke arresting unit consisting essentially of a smoke gathering manifold for vacuuming into said manifold smoke laden gases escaping from said furnace chamber when said furnace door is opened, a smoke conduit for conducting the smoke laden gases vacuumed into said manifold, a mountable separate smoke emitting chimney separated from said furnace chimney for externally emitting the smoke laden gases conducted thereto by said conduit, an electronically powered vacuum source for vacuuming said gases into said manifold and conducting the smoke laden gases through said manifold onto said conduit and onto said mountable separate smoke emitting chimney and an electronic switching member for activating the vacuum source when it becomes desired to arrest the smoke laden gases escaping from said furnace chamber when said door is open and mounts for exteriorly mounting said unit onto said wood burning furnace.