Patent ID: 8157896

Claim:
A method of filtering ambient air using a portable air filtration system for construction including finishing and remodeling of interior rooms of commercial and residential buildings comprising: providing an airnet filtering bag having: an air permeable woven filtering fabric having an air permeability of about 55 cfm and formed in a general windsock shape having a first open end defined by a perimeter and a second closed end; and a closing element retained in a chamber positioned along the first open end and defined around substantially the entire perimeter of the first open end; providing a fan having a perimeter and a discharge end; engaging the first open end with the perimeter of the fan around the discharge end; closing the closing element and the first open end around the perimeter of the fan in order to retain the airnet in position thereon; and actuating the fan in order filter ambient air through the airnet; when the fan is actuated ambient air will pass from the supply side through the fan housing and out of the discharge side of the fan into the filtering fabric.