Specifications include, but are not limited to: • All air filters must be manufactured in the United States. • All air filters provided under this contract are to be new, first quality, high efficiency, industrial grade air filters. Vendors shall not quote economy or home grade air filters. • All filters shall be rated MERV 8 or greater as per ASHRAE Standard 52.2. • All filters provided shall not be any larger than specified and can be within one quarter (1/4) inch smaller of exact sizes. • Initial resistance of filters shall not exceed the following: One inch (1”) filters: 0.15 “w.g. at 300 fpm or greater Two inch (2”) filters: 0.26 “w.g. at 492 fpm or greater Four inch (4”) filters: 0.19 “w.g. at 492 fpm or greater • All air filters are to be plainly marked on the frame with the manufacturer’s name, size, and direction of air flow. • Air filters may not be cut down or altered, taped, stapled or otherwise attached together to create the required size and/or thickness. All seams shall be glued.