1. Name: hygienic combined air-handling unit AHU-403.
2. Model: mechanically circulated four-pipe system.
3. Specification: airflow ≥14500 m³/h, cooling load ≥43 kW, heating load ≥34 kW, motor power ≥11 kW.
4. Mounting: floor-standing.
5. Dampers and supports: rubber damping for the unit, spring damping for the fan.
6. Sections: mixing + fan + flow equalising + primary and secondary filtration (G4, F8) + cooling coil + heating coil + humidification + supply + drain pan.
7. Fitted with inspection light and disinfection device.
8. Unit installation, commissioning and trial run.
9. Use a direct-drive plenum fan or centrifugal fan with VFD control; coils use quality copper tube with anti-corrosion hydrophilic aluminium fins; the condensate pan is a stainless steel dry pan.
10. Panel insulation uses non-combustible rock wool, density ≥80 kg/m³, or PTS high-strength foam board. Top and side panels ≥50 mm, base ≥50 mm.
11. The unit must be quiet: noise measured 2 m away ≤60 dB(A).