EACH PURCHASE GETS YOU A 6 PACK OF FILTERS! MORE PLEATS MEANS THAT THE FILTER WILL LAST LONGER BETWEEN CHANGES! IT ONLY MAKES SENSE, RIGHT? MORE TOTAL SURFACE AREA FOR THE DUST TO COLLECT ON BEFORE IT BECOMES CLOGGED UP AND NEEDS CHANGED. SECONDLY, MORE TOTAL SURFACE AREA IN A FILTER MEANS THAT IT IS EASIER FOR YOUR HEATING AND / OR AIR CONDITIONING UNIT TO SUCK THE AIR THROUGH IT! SAVING YOU EVEN MORE MONEY ON ELECTRICAL COSTS SINCE YOUR UNIT RUNS MORE EFFICIENTLY! HANDS DOWN, THIS IS THE TOP PREMIUM MERV 11 FILTER WE SELL. IT HAS THE HIGHEST PLEAT COUNT AND THE LOWEST AIRFLOW RESTRICTION. THESE MAY COST A LITTLE BIT MORE PER FILTER THAN THE OTHERS OUT THERE, BUT IN THE END, YOU SAVE MONEY BECAUSE YOU DON'T HAVE TO CHANGE THEM OUT AS OFTEN! 0.232" W.G. RESISTANCE AT 300 FPM (LOWER THAT MOST CHEAP MERV 8'S ON THE MARKET!) Filter Media 100% synthetic gradient media Filter Support Grid 30 gauge galvanized expanded metal grid Frame Moisture resistant double wall beverage board Assembly Technique Media pack totally bonded to frame Max. Temperature 180°F (82°C) continuous service, Peaks 225°F (107°C) Max. Humidity Resistant to 100% R.H. Flammability U.L. 900, Class 2 LIKE MOST FILTERS, THE SIZE PRINTED IS THE "NOMINAL SIZE" ACTUAL SIZES OF FILTERS ARE ALWAYS SLIGHTLY SMALLER Example: a 20x25x1 filter measures about 19.5x24.5x3/4
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