– Pre-filter (also referred to as: Main filter, Primary filter)
All air conditioners have a filter at the entrance of the air inflow to prevent large particles entering the indoor unit.
Pre-filters require regular cleaning to prevent them from clogging. Filter clogging prevents the air from flowing properly, which reduces the cooling capacity of your air conditioner and also increases the power consumption. That's why filter cleaning is necessary to maintain your air conditioner's performance.
Pre-filters are made of various materials, with varying properties in terms of longevity, cleanliness and washability.