Yes, 30C being the highest temp going into a floor. There is a move to SCOP over COP because we should be looking at annual bills for the real indicators.
With the use of an outdoor reset mixing valve on the floor heating, we can often keep the temp to 24 -28C at milder temps which, with the right HP, could give a COP or 4 or better.
My friends in europe are putting tubing at 100mm(4") in many cases which until a few years ago I would only do in a sunroom. Now I do it most places. Tubing is a cheap one time cost.
|