Abstract: A duct assembly for disposition in an attic of a building includes a first vent and a duct. The first vent defines an opening for fluidly communicating with air in an exterior of the building. The duct includes an elongated side defining a passage. The elongated side extends between a first end and a second end with the first end coupled to the first vent and with the passage in fluid communication with the opening of the first vent. The duct includes an end plate sized larger than the passage and sealed to the second end covering the passage at the second end. The elongated side includes an unperforated portion being unperforated and a perforated portion defining a hole for providing fluid communication from the opening of the first vent to the hole.