Flanders 10059.011620 Standard Grade Nested GLS Furnace Filter 24/Pack, 20" x 16" x 1" - Lot of 242424

Flanders 10059.011620 Standard Grade Nested GLS Furnace Filter 24/Pack, 20" x 16" x 1" Features: This is a standard grade furnace filter of the same type that has been protecting furnaces and central air conditioners around the world for over 50 years.The filtering medium is continuous filament spun glassFor peak equipment protection and energy efficiency, these filters should be changed monthly in periods of high use24 per case. Features: Spun glass; lasts up to 30 daysMaximum air flowAlleviates strain on equipment