Critical Area Recirculation and Exhaust System
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United States of America Patent
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Issued Date -
Mar 16, 2023
app pub date -
Aug 31, 2022
filing date -
Sep 10, 2021
priority date (Note) -
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status (Latency Note)
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Abstract
A critical area recirculation and exhaust system for a room operates in a normal operating mode where fresh air is delivered from an air handler through a diffuser and returned to the air handler through a room return duct. In a selected isolation operating mode, a fan filter unit is activated to draw contaminated air from the room through one or more filters and to expel the filtered air through the diffuser and through an exhaust air duct to create an increased air change rate and a negative pressure in the room.
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