Windy panel is a panel-type filter with pre-attached frame that is considered to be able to maximize the performance of filter material. Panel air filter is ideal as a pre-processing filter for general air of high performance filters.

There are some types for suggestion:
VT type material due to the used of aluminum, light weight and easy handling. Standard equipped with left and right types are consolidated. 
VA inner frame and outer frame can be easily separated. It is easy replacement of the filter material. Corrosion resistant aluminum frame. It is light weight and easy handling.
VP type incorporating a pattern in the shape of the filtration surface, is highly economical type.
VK frame filter paper: in order to maximize the area of air filtration, filter was molded frame sealed with a special adhesive recycled paper. The filter material was folded pleats. It is a type of filter paper frame