How to choose the right filters for your HVAC & AHU system?

How to choose the right filters for your HVAC & AHU system?The key is multi-stage filtration + progressive protection for energy saving and lower maintenance cost.

✅ First decide your final filter efficiency based on cleanliness requirements

✅ Primary filter: protects the medium-efficiency filter

✅ Medium-efficiency filter: protects the HEPA/secondary HEPA filter

✅ Layer-by-layer dust removal extends filter life

Typical replacement cycle

Primary filter: 1–3 months

Medium filter: 3–6 months

Secondary HEPA: around 1 year

Proper filter configuration makes your HVAC system more stable, energy-efficient, and reliable.