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Glasfloss Z-Line MR-13 13-1/2 x 13-1/2 x 2 MERV 13 furnace filters are the ultimate upgrade from standard pleated air filters and excel where similar HVAC filters (Heating, Ventilation & Air Conditioning) fall short. These MERV 13 air filters also offer an eco-friendly design and excellent particle filtration including many viruses and allergens that aggravate [...]

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