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PERMAFILT
Pre-Filter is designed to last for years. Once installed, this Pre-Filter
can be easily maintained by occasional vacuuming from outside the perforated
steel housing of the Austin Air unit. This procedure keeps the Permafilt
Pre-Filter clean and increases the life expectancy up to 2 or 3 years, eliminating
costly quarterly filter changes. Fits Austin Air Standard size models. Delivery within
5-10 working days.
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