Koch Air Filter 20 x 22 x 1 MERV 8 Pleated Air Filter - 12 Pack Negative Air Machine Filters Replace every 18 to 24 Vacuum Accessories & Replacement Parts Air Purifying Filters:Three (3) DFS-CAR-SF461-PK2 suitable for larger multi

Replace every 18 to 24 months under normal operating conditions

The technology has earned Sensitive Choice approval from the National Asthma Council Australia

Always use Genuine Abatement Filters to maintain your equipment warranty

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Koch Air Filter 20 x 22 x 1 MERV 8 Pleated Air Filter 12 Pack Negative Air Machine Filters Replace every 18 to 24 Vacuum Accessories & Replacement Parts Air Purifying Filters:Three (3) DFS CAR SF461 PK2 suitable for larger multi Replace every 18 to 24 months under normal operating conditions The technology has earned Sensitive Choice approval from the National Asthma Council Australia