REMEHA iBase User Manual page 19

 The range of the controller in buildings is generally 30 metres.
Note!
This value is purely an indication. The actual range of the RF signal depends
strongly on the local environment. Remember that the number of walls and
ceilings (metal or otherwise) can have a (considerable) impact on reception.
Other objects that contain metal may also impact reception. These include
mirrors and windows with a metal coating, insulating films, tumble driers,
washing machines, etc.
EN
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