| 摘要 |
Extruded plastic mounting channels (12) are adapted to be attached in pairs to spaced apart parallel plane surfaces of the perimeter surrounding an opening in an air handling unit to support a filter element (24) overlying the opening. The channels (12) have first and second parallel spaced apart alternative mounting walls. Extending between the mounting walls are a pair of filter support walls. A first support wall (40) is substantially planar and defines a U-shaped filter support channel in cooperation with the spaced apart attachment walls. A second support wall (42) has a stepped configuration which defines a pair of spaced apart filter support walls. When two of the mounting channels are attached, through their first flat attachment wall, to spaced plane surfaces of an opening with their respective planar filter support walls facing each other, they will cooperate to support a filter having a thickness of two inches. |
