Air filters trap dust, pollen and microbes from moving air. Learn how filtration works, the key terms-efficiency, pressure drop, dust-holding-and why every HVAC system needs one.
空气过滤器效率等级：G1-G4、F5-F9、H10-H14
Demystify air-filter ratings-coarse G1-G4, fine F5-F9 and HEPA H10-H14. Understand EN 779, ISO 16890 and EN 1822 so you can specify the right class with confidence.
哪种空气过滤器用在何处：按行业与空间的应用指南
A practical map of which air-filter class fits which space-offices, hospitals, cleanrooms, paint booths, data centres, food and pharma-plus typical two- and three-stage arrangements.
Choosing Air Filter Material: Fiber, Carbon, Mesh
Filter media is not one material. Compare synthetic fibre, glass fibre, activated carbon and metal mesh on efficiency, temperature, cost and reusability to pick the right media.
Air Filter Maintenance: Pressure Drop & When to Replace
Replace filters on pressure drop, not the calendar. Learn to read a differential manometer, set final ΔP limits, and plan safe changeout for primary, medium and HEPA stages.
Where China’s Heat-Recovery Demand Comes From in 2026
China’s recovery-equipment boom is not one market — it is four, pulling different products. Understanding the split helps overseas buyers read a supplier’s catalogue. HVAC & new buildings China’s building-energy rules now require all new urban buildings to meet green-building standards, and large or public buildings are pushing energy-recovery ventilation. In the cold north-east, clean-heating […]
China Heat-Exchanger Exports 2026: Buyer Guide
China is not just the world’s biggest heat-exchanger market — it is its export engine. 2025 exports reached roughly US$8.9 billion, with the trade surplus up about 47% versus 2020. The first half of 2026 ran ~US$6.7 billion, up 15.8% year on year. Where it goes ASEAN — fastest-growing neighbour market for HVAC and industrial plates. Middle […]
Why Chinese Heat Exchangers Cost What They Do in 2026
“Why is it so cheap?” is the first question every overseas buyer asks. Here is an honest teardown for a mid-range plate heat exchanger. Cost structure (per unit) Raw materials 55–60% — aluminium (6061/6063) or copper, stainless plates (304/316), and gaskets (EPDM/NBR). Material cost is the swing factor. Labour & assembly 15–20% — brazing, sealing, […]
CRH 2026: HVAC Expo Takeaways on Recovery
The 37th China Refrigeration Expo (CRH 2026) ran 8–10 April 2026 at the Beijing Capital International Exhibition & Convention Center. With roughly 115,000 m² of halls, 1,041 exhibitors from 30 countries and more than 80,000 professional visitors, it remains the single best window into China’s HVAC&R supply chain. The official theme — “Digital intelligence shapes cooling […]
Plate vs Rotary Wheel: What Chinese Factories Are Shipping in 2026
Walk any Chinese HVAC factory floor in 2026 and you will see two air-to-air recovery technologies dominating the line: the fixed-plate recuperator and the rotary enthalpy wheel. They solve the same problem — recovering energy from exhaust air — with opposite mechanics. Knowing which one a supplier pushes tells you a lot about their target […]