ACADEMY SERIES · EPISODE 18System Architecture

Central or Local Humidification?

A central humidification system sends air with the same moisture content to every zone, so even a two-degree temperature difference between rooms shifts relative humidity by about five points. This episode covers the strengths and weaknesses of central, local and hybrid architectures, sensor placement, duct condensation and the three questions behind the right decision.

Published: 8 October 2026Narration: Turkish and English6:21

In this video

  • A central system sends air with the same moisture content to every zone; at 7.4 grams per kilogram it gives 45% RH at 22 °C, about 51% at 20 °C and 40% at 24 °C.
  • The strength of a central architecture is a single water, drain, power and automation connection; if that one unit fails, every zone it serves is affected at once.
  • The high-limit sensor in the supply duct sits beyond the absorption distance, which according to Neptronic is under 1.5 metres for S.A.M. distributors and under 1 metre for Multi-Steam.
  • The real advantage of local humidification is not speed but direct control from the room's own sensor; the price is a separate unit, sensor, water and drain connection and maintenance job for every room.
  • The decision rests on the humidity difference between zones, the hygiene classes and the site's steam, water and automation infrastructure; as the difference grows, zone trim and then a hybrid come to the fore.

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