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For maximum efficiency, we recommend to change filters every month. Filthguard filters are designed and tested under a variety of operating conditions. However, there are some reasons that you may need to change filters more often such as the construction in progress, while polishing furniture or walling, and have pets. Therefore, the filter should be changed regularly.

Filthguard is designed to allow air to flow smoothly and consistently without affecting the cooling system. But if the filter has been used for longer than the recommended age air flow may begin to be limited, which may cause the cooling system to malfunction.

One roll of up to 15×96 inches that can be used with all brands air conditioner just cut the filter to the size of the coarse filter.