Patent ID: 6156089
Filing Date: 2000-12-05
Classification: B01D

Abstract:
An air circulating system for circulating air including odor-causing materials including chemicals and organisms, the system comprising:a fan coupled to air stream ducting of the air circulation system for causing movement of air in a stream through the ducting;a filter holder configured to hold an air filtering device supported within the air stream; andan air filtering device for removing from the circulating air at least a portion of the odor-causing materials, the air filter device having first and second filter elements, the first filter element including at least one layer of a first filtering material, at least one layer of a second filtering material different from the first filtering material, and a first support member which is interposed between and secured to the at least one layer of the first filtering material and the at least one layer of the second filtering material, the support member including a plurality of openings therein.