| 主权项 |
1. A hybrid fireplace assembly, comprising:
a fire box with an interior area configured to contain a combustible fuel that will burn and generate exhaust, the firebox having a front wall, a back wall, sidewalls, a base plate, a top portion, and an exhaust outlet; a baffle connected to the firebox and disposed in the interior area to define a lower combustion chamber below the baffle and an upper combustion chamber above the baffle, the lower combustion chamber being sized and shaped to contain at least a portion of the fire from burning combustible fuel, the upper combustion chamber having an upper exhaust passageway between baffle and the top portion of the firebox; a primary combustion air passageway configured to carry primary combustion air to the lower combustion chamber, the primary combustion air passageway having an inlet that receives air therein for primary combustion and having at least one outlet in the firebox that directs primary combustion air toward the fire in the lower combustion chamber; a secondary combustion air passageway configured to carry secondary combustion air into the firebox, the secondary combustion air passageway having an inlet that receives air therein for secondary combustion of at least portions of exhaust from the burning of the combustible fuel in the lower combustion chamber, the secondary combustion air passageway having air outlets in the firebox that directs the secondary combustion air adjacent to the baffle to mix with the exhaust for non-catalytic secondary combustion of the exhaust before the exhaust flows through the upper exhaust passageway; a catalytic combustion unit in the firebox and positioned above the baffle and across the upper exhaust passageway whereby the exhaust will pass through the catalytic combustion unit after the non-catalytic secondary combustion of the exhaust and before the exhaust exits the upper combustion chamber through the upper exhaust passageway, the catalytic combustion unit configured to remove combustion byproducts from the exhaust when the exhaust passes through the catalytic combustion unit; and a bypass damper connected to the top portion of the firebox and moveable between closed and open positions, in the closed position the bypass damper blocks the exhaust from flowing therethrough and the exhaust must flow through the catalytic combustion unit, and in the open position at least a portion of the exhaust can flow therethrough without passing through the catalytic combustion unit. |
