JohnMo Posted April 15, 2023 Share Posted April 15, 2023 8 hours ago, SuperJohnG said: thermostat we have is the wunda one I think these have a pretty big hysterisis so not the best with high mass heating systems. If you are set on Valiant product, I would check out what comes with the unit it's self, that may be ok on its own. Thick floors keep it as simple as you can. 1 Link to comment Share on other sites More sharing options...
Nickfromwales Posted April 15, 2023 Share Posted April 15, 2023 17 hours ago, SuperJohnG said: We have 250mm in our ring beam and 150mm concrete throughout on 200mm spacing so I think we will be very slow. Which is exactly what you want to aim for. Charge the slab during off-peak via ASHP ( CoP of 3-4 ) and then slow release the heat throughout the gaps of peak-rate electricity. Nice smooth hysteresis and super-low flow temps, as discussed above. 1 Link to comment Share on other sites More sharing options...
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