The standard supply for a new house seems to be circa 18KVA single-phase. I have a client who needs to make application for a supply for a new build house at 400m2 with the only certain information being that an air source heat pump is to be used for heating. The client simply does not know what the electrical loading might be. The house is only coming out of the foundations but the DNO supply may take many months as the house is in a relatively remote rural location, thus loading details are required before the DNO will consider progressing the proposal. It is a big house, but that is what it is, just a big house. I am inclined to advise a standard supply but 3-phase as with a large AS heat pump, maybe shower, cooking and perhaps an EV or two, 18KVA wouldn't be long being gobbled up. As we move towards a higher reliance on electric as a power source for some heavy current-using equipment, it might be that 18KVA is no longer a realistic standard supply for even the smaller property.
Some of the figures given for heating demand sound rather low to me, considering not just just the steady state demand, but also heating from cold after a winter holiday.
Neighbours of mine have a house of just under 500 square meters and a 26 Kw oil boiler is only just sufficient and that is with an estimated heat input of another 5Kw from an oil burning cooker. The house is about 30 years old but was built with insulation far in excess of that then required.
Some of the figures given for heating demand sound rather low to me, considering not just just the steady state demand, but also heating from cold after a winter holiday.
Neighbours of mine have a house of just under 500 square meters and a 26 Kw oil boiler is only just sufficient and that is with an estimated heat input of another 5Kw from an oil burning cooker. The house is about 30 years old but was built with insulation far in excess of that then required.
