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Glasfloss 16x20x4 furnace air filter, MERV 13 rating with extended surface pleated media offer low pressure drop with high energy efficiency and do not absorb moisture. Glasfloss filters are rigorously tested for ASHRAE Std 52.2 for MERV rating and classified per UL Standard 900 for flammability requirement. The maximum operating temperature range is 180 F
Glasfloss 16x20x4 furnace air filter or furnace air filter of MERV 13 rating offer better performance than MERV 8 & 10. Removes dust particles between 0.3 (75%) to 10 microns sizes.
Glasfloss dedicated services since 1936 to millions of satisfied customers. A reliable and good quality product from trustworthy company.