When deciding how often to replace a primary air filter, several key factors need to be considered. Here are some suggestions for the replacement cycle of primary air filters for your reference:1. General replacement cycle: - For primary air filters, it is usually recommended to replace them every

The main purposes of the primary filter are as follows: 1. Filtering large particles and impurities: The primary filter is mainly used to filter out large particles, dust, dander, and other impurities in the air. By blocking these particles, it can effectively improve the quality and cleanliness of