WOUNDDUP DOOR STORAGE AND VENTILATION BOX ATTACHABLE TO WINDOW FRAME* DOOR FRAME OR LIKE

摘要

A combined rolling shutter and ventilating box comprises a housing holding the rolling shutter. A ventilating box has horizontal and vertical air duct sections divided into a first duct section part receiving warm air to be exhausted from an interior room and a second duct section part receiving fresh air from the atmosphere. A ventilator exhausts the warm air through the first duct section part and the exhausted warm air is vented to the atmosphere. A fresh air inlet communicates with the second duct section and a ventilator draws the fresh air therethrough. A heat exchanger in the air duct sections extends transversely through the air flow through the first and second duct parts.