Austin Air Healthmate Pre-Filter JUNIOR Size.
Austin Air 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 ONLY Austin Air Junior size models.