Views: 0 Author: Site Editor Publish Time: 2026-08-18 Origin: Site
Active vs Passive RDHX Fan Configuration
1. Active RDHX (with built-in fans, standard high-power model)
Equipped with integrated high-static-pressure EC fans mounted inside the rear door heat exchanger frame.
Fans run independently, controlled by the RDHX local controller based on inlet air temperature.
Purpose: Overcome airflow resistance of the cooling coil, support rack heat loads up to 60–68kW.
Server internal fans can operate at lower RPM, reducing overall server power consumption and noise.
Power supply: 48V DC or 220V AC power interface on the door for fan power input.
2. Passive RDHX (no internal fans)
No built-in fans at all. It fully relies on the hot exhaust airflow pushed out by the server’s own chassis fans.
Lower airflow resistance coil design to reduce burden on server fans.
Only suitable for low-to-medium heat density racks (max 30–35kW).
Advantages: Lower cost, zero extra fan power consumption, fewer wearing parts, simpler maintenance.
Quick Distinction Summary
Active RDHX: Has its own built-in EC auxiliary fans.
Passive RDHX: Fan-free; completely depends on server fans for air circulation.
