The Helios Fans KWL-NHR 500 is a low-temperature reheating register designed for connection to the KWL HB 500 WW HygroBox in ventilation systems with low-temperature heating. This unit includes a warm water heat exchanger with a DN 250 mm pipe connection, ensuring efficient reheating of supply air. An external PT1000 temperature sensor is included for accurate temperature regulation. The KWL-NHR 500 enhances thermal comfort and energy efficiency by supplementing ventilation with controlled post-heating.