BDR91 relay box honeywell
BDR91 used for underfloor heating:
The BDR91 can be used instead of the HCC80R manifold controller, it is simple, each UFH zone is controlled be a BDR91 bound as a zone valve to evohome and a suitable thermostat bound as a temperature sensor.
A relay may be required for multiple zones to activate the UFH pump. Please contact us for details.
This set up will work and control UFH exactly the same as using a HCC80R.