To choose a suitable primary filter, you can refer to the following aspects

Air flow rate

The selection of primary filters should be based on the design air volume of the ventilation system to ensure that they can meet the air flow requirements of the system and avoid affecting the performance of the ventilation system due to excessive filter resistance. The rated air volume is usually indicated in the product manual, and the rated air volume of the selected filter should be close to or slightly greater than the actual required air volume.

Size specifications

Select a suitable size of primary filter based on the space size of the installation location and the size of the ventilation duct, ensuring that it can be accurately installed in a fixed position and matched with other components of the ventilation system. Common sizes include standard squares or rectangles, as well as special shapes such as circles.

texture of material

Filter materials: Common ones include glass fiber, polyester fiber, non-woven fabric, etc. Glass fiber has high strength and high temperature resistance, but its price is relatively high; Polyester fiber has good flexibility and moderate price; Non woven fabric has low cost, but its strength and durability are slightly inferior. For example, in general commercial building ventilation systems, primary filters made of polyester fiber or non-woven fabric materials can meet the requirements.

• Border material: There are metal borders and paper borders. The metal frame has high strength and durability, but it is heavy and may rust; The paper frame is lightweight, but its strength is relatively low. In some cases where weight is required, paper framed primary filters may be more suitable.

Maintenance costConsider the lifespan of the filter, the ease of cleaning and replacement, and related costs. Filters with long service life, easy cleaning and replacement can reduce maintenance costs and workload during long-term use. For example, a washable and reusable primary filter may have a higher initial purchase cost, but in the long run, it can save on replacement costs.

work environmentIf the working environment has high humidity, it is necessary to choose a filter with good moisture-proof performance; In environments with chemically corrosive gases, filters made of corrosion-resistant materials should be selected to ensure their performance and service life.