Austin Air HealthMate Standard Pre-Filter 12-Pack is the Value Pack of twelve Austin Air PermaFilt replacement pre-filters for Austin Air HM400 Standard Series air purifiers including:

• Austin Air HealthMate HM400
• Austin Air Allergy Machine HM405
• Austin Air HealthMate Plus HM450
• Austin Air Pet Machine HM410
• Austin Air Bedroom Machine HM402

Austin Air Standard  Pre-Filters are available in two colors:

• Black - for units in Black and Blue colors
• White - for units in White and Sandstone colors

Austin Air pre-filter is a first stage of Austin air purifier air filtration system.
Austin Air pre-filter traps large dust and dirt particles while protecting True HEPA filter from faster contamination and extending its lifetime.
The pre-filter can be vacuumed with vacuum cleaner and soft brush right through the metal mesh of the air purifier housing.
The Austin Air pre-filter's lifetime is 9 to 12 months under normal residential conditions and use.