Hybrid rad / uunder floor system

[dave1967]

Looking at installing this for current property. Gch,  4 rads and 5 rooms with under floor which are suspended. 

Any recommendations for mainifold actuators and room stats etc welcomed.

 

[JohnMo]

Try to operate the UFH as a single zone, from a single stat.  You need a low hysteresis stat for UFH, so something like a Salus SQ610, and WQ610 for the radiators.  Use Salus THB23030 Auto Balancing Actuators and a generic UFH wiring centre for wired stats or Salus one if you are for RF thermostats.

 

You will need a mixing valve and pump on the manifold to separate the radiator flow from UFH flow.  Not sure of you insulation standards, but best to get a mixer that can go below 30 degs to give you more flexibility with flow temperature.

 

Wouldn't waste too much money on UFH control, as you need to operate at low temperatures for lengthy periods.