Constant-flow air supply ceiling – Core component replacement cycle
1. High-efficiency filters HEPA/ULPA (the most critical consumable)
Classical cleanroom / operating room: 1-2 years
High usage frequency, large amount of dust: 6-12 months
Judgment criteria:
Resistance reaches twice the initial resistance or cleanliness does not meet standards → must be replaced
2. Diffusing membranes / diffusers / damping nets
PTFE diffusing membranes: 2-3 years
Aluminum alloy diffusers: 3-5 years
If deformed, clogged, or the effect significantly decreases after cleaning, replace
3. Fans, motors
Ordinary centrifugal fans: 5-8 years
DC brushless fans: 8-10 years
If noise increases, air volume significantly decreases, or abnormal heating → replacement
4. Sealing parts, liquid tank sealant
Sealing strips: 1-2 years
Liquid tank sealant: 3-5 years
If aging, cracking, or air leakage occurs → replace immediately
5. Pressure boxes, frames, shells
These belong to structural components and do not need to be replaced regularly
Normal use can last 10-15 years with the ceiling
One-sentence summary (for your convenience)
Filters: must be replaced within 1 year
Diffusing membranes: 2-3 years
Fans: 5-8 years
Sealing parts: 1-2 years