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utilizing regular heat
making it approved for outdoor use
highly durable materials
steady performance
and reduced energy use
Clean Comfort MERV 11 Pleated Air Filter 20X20X4.5 (5pk) 38118 utilizing regular heatThis is a package of 5 filters. These filters function at MERV 11 and are ~4. 5 in thick. Most filters labeled 4. 5 in thick are actually ~4. 375 in thick, this is normal. For this thickness of filter we recommend changing your filter every 6 9 months for maximum air flow, best filtration, and least wear and tear on your system. Something to note is that human lungs filter air at approximately MERV 8 equivilant. Using filters above MERV 8 helps to
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