Specifications include, but are not limited to: Air Conditioning Filters FILTER REQUIREMENTS: Fiberglass Disposable: To be constructed from a layer of fiberglass bonded between two (2) metal grids. The metal grids to provide rigidity to the filter. The filter to be encased in a cardboard frame. Extended Surface Non-Supported Pocket, 40-45% Efficiency: To be constructed of synthetic media. Shall be a minimum MERV 10 and meet ASHRAE efficiency ratings. Extended Surface Non-Supported Pocket, 90-95% Efficiency: To be constructed of synthetic media. Shall be a minimum MERV 14 and meet ASHRAE efficiency ratings. Extended Surface, Supported Box Style, 80-90% Efficiency: To be constructed of synthetic media having a galvanized steel frame designed to withstand environmental conditions. Shall be minimum MERV 14 and meet ASHRAE efficiency ratings;