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12x25x2 MERV 13 filters are pleated
Aprilaire 700 Series
Polaris Scientific UV-NUT-2 Stainless Steel Short Nut For End Plug
Harmsco HB-20-20-W 20 Micron 20" BB Pleated Filter Cartridge
follow the instructions for flushing the cartridge to remove the fines before using the water
Aprilaire #4403 Float Chamber Humidifier Accessories 12x25x2 MERV 13 filters areThe Aprilaire 4403 Humidifier Float Chamber is a replacement humidifier float chamber for the Aprilaire 400 humidifier. The float chamber prevents water from entering other portions of the humidifier.
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