The Room Hygrostat, available from Grimwood Heating , can be used for controlling and monitoring relative humidity in office and residential rooms, baths, labs, control, cabinets, computer rooms, etc. It is not applicable for aggressive gases.

The Room Hygrostat is wall-mounted or on in-flush box, socket with 4 holes for mounting on vertically or horizontally installed flush boxes, with predetermined breaking point for on-wall cable entry.


  • Humidifying or dehumidifying in HVAC systems, selectable through terminal wiring on the pcb
  • Setting range 35 to 100% RH
  • Set point - Exposed set point for HRS 1ES; Concealed set point for HRS 1CS
  • Power supply 24 - 230 Vac