Air filter assembly

A kit for forming an air filtering assembly from a box fan assembly and a filter assembly, the box fan assembly being of the type having a parallelepiped housing with square open sides on which protective grills are mounted, an electric motor having a fixed portion mounted on and within the housing and a rotor assembly on which is mounted a fan blade also within the housing that, when the motor is activated via means for connecting the motor to a source of electric power included in the box fan, rotates about an axis normal to and generally centered on the side surfaces to move air through the protective grills, said housing including a peripheral wall between the peripheries of the open sides including opposite side portions;

• and the filter assembly being of the type including a parallelepiped frame having opposite sides, said sides having through openings and generally rectangular peripheries, and having a peripheral wall between the peripheries of said sides, and a sheet of air filtering material within said filter assembly frame between said sides, said sides of said filter assembly generally corresponding in shape and size to the sides of said housing of said box fan assembly;
• said kit including
• a plurality of attachment members each having a rear portion having a rear surface, a front surface opposite said rear surface, and first and second spaced ends;
• a front portion extending along the front surface of said rear portion and having first and second spaced ends, and an end portion joining the first ends of said rear and front portions and defining a passageway transverse of said front, rear, and end portions;
• a plurality of lengths of adhesive adapted for adhering the rear surfaces of said attachment members to the outer surfaces of the side portions of said peripheral wall;
• and
• at least one resiliently elastic cord adapted, when said attachment members are adhered to the side portions of the peripheral wall, to extending through the passageways in the attachment members and between the attachment members around the side of the filter assembly opposite said box fan assembly to retain said filter assembly along one of the sides of said housing of said box fan assembly.

A method for forming an air filtering assembly including the steps of:

• providing a box fan assembly of the type having a parallelepiped housing with square open sides on which protective grills are mounted, an electric motor having a fixed portion mounted on and within the housing and a rotor assembly on which is mounted a fan blade also within the housing that, when the motor is activated via means for connecting the motor to a source of electric power included in the box fan, rotates about an axis normal to and generally centered on the side surfaces to move air through the protective grills, said housing including a peripheral wall between the peripheries of the open sides including opposite side portions;
• providing a filter assembly of the type including a parallelepiped frame having opposite sides, said sides having through openings and generally rectangular peripheries, and having a peripheral wall between the peripheries of said sides, and a sheet of filter material within said filter assembly frame between said sides, said sides of said filter assembly corresponding in shape to the open sides of the housing of said box fan assembly;
• providing a plurality of attachment members each having a rear portion having a rear surface, a front surface opposite said rear surface, and first and second spaced ends;
• a front portion extending along the front surface of said rear portion and having first and second spaced ends, and an end portion joining the first ends of said rear and front portions and defining a passageway transverse of said front, rear, and end portions;
• providing a plurality of lengths of adhesive;
• providing at least one resiliently elastic cord;
• using the lengths of adhesive to adhere the rear surfaces of the attachment members to the outer surfaces of the side portions of the peripheral wall;
• positioning said one of said sides of said filter assembly along said one of the sides of said housing of said box fan assembly with the peripheries of said filter assembly and said housing generally aligned;
• stretching and positioning the resiliently elastic cord through the passageways in the attachment members and between the attachment members around the side of the filter assembly opposite the box fan assembly to retain the filter assembly along the side of the housing of the box fan assembly.