Abstract: A condensing gas-fired furnace has a furnace cabinet, a primary heat exchanger, a secondary heat exchanger located upstream relative to the primary heat exchanger with regard to location within a circulation airflow path, a first baffle carried by a first wall of the furnace cabinet, and a second baffle carried by a second wall of the furnace cabinet, wherein the second baffle is located opposite the first baffle, and wherein the second wall is located opposite the first wall. The first baffle and the second baffle cooperate to form a nozzle within the furnace cabinet. A third baffle and a fourth baffle extend from the bottom of the first baffle and the second baffle, respectively, to the blower deck located adjacent to a secondary heat exchanger.

Abstract: A condensing gas-fired furnace has a furnace cabinet, a primary heat exchanger, a secondary heat exchanger located upstream relative to the primary heat exchanger with regard to location within a circulation airflow path, a first baffle carried by a first wall of the furnace cabinet, and a second baffle carried by a second wall of the furnace cabinet, wherein the second baffle is located opposite the first baffle, and wherein the second wall is located opposite the first wall. The first baffle and the second baffle cooperate to form a nozzle within the furnace cabinet. A third baffle and a fourth baffle extend from the bottom of the first baffle and the second baffle, respectively, to the blower deck located adjacent to a secondary heat exchanger.

Abstract: A furnace is disclosed. The furnace may include an enclosure having a vertical support column formed by a heat exchanger compartment panel and a blower compartment panel. The furnace may include a window assembly having venting openings hidden by a viewing window. The furnace may also include a rail to support a removable heat exchanger system. The furnace may further include a wire retaining fin assembly to retain a wire. A heat exchanger header design including features to retain a sealant is also disclosed.

Abstract: A condensing gas-fired furnace has a furnace cabinet, a primary heat exchanger, a secondary heat exchanger located upstream relative to the primary heat exchanger with regard to location within a circulation airflow path, a first baffle carried by a first wall of the furnace cabinet, a second baffle carried by a second wall of the furnace cabinet, wherein the second baffle is located opposite the first baffle, and wherein the second wall is located opposite the first wall, and a third baffle carried by a third wall of the furnace cabinet, wherein the third baffle is located adjacent to the first baffle and the second baffle, and wherein the third wall is located adjacent to the first wall and the second wall.