A rigid, extended surface air filter that is engineered to provide maximum performance and prolonged filter lifecycles, even in the most difficult environments. Its durable, rugged construction makes it a great choice for filtration systems with high velocities or variable air volume (VAV). Constructed with an all plastic frame, it is easily incinerated after use. Its durable, rugged construction makes it a great choice for filtration systems with high velocities or variable air volume (VAV). Constructed with an all plastic frame, it is easily incinerated after use. Low pressure drop reduces energy costs. Provides an unequaled combination of low pressure drop and high efficiency through the use of our unique minipleat design. This increased extension of the media surface area ensures a low pressure drop, which can aid in lowering energy costs to the building owner. An extended filter life means less maintenance. Another benefit of the increased media area is extremely high dust holding capacity, which significantly prolongs the service life of the filter. Fewer filter changes translate into substantially reduced maintenance and disposal costs.