Ideal AP30 and AP40 Pro Air Purifier Replacement FilterAP30 & AP40 Replacement Filter Long lasting 360smart filters Energy efficient and extremely quiet running motors, along with flow optimized fans, guarantee extremely low energy consumption. Under normal air conditions, the filter only needs to be replaced approximately every 12 18 months even if the unit is in continuous use. This saves costs and reduces maintenance work. 5 Layer Filter: Pre filter Mesh Multi layer filter removes dirt and debris such