Night storage heaters and the costs

Stubod

bob2302 said:

Stubod said:

We recently changed a (30 year old) old NSH for a Quantum. The old SH "leaked heat" and was cold by about 5:00 pm.

Was that with it on minimum output during most of the day?

..yes, we always leave the "output" vents fully closed on all our old heaters, it's only a thin metal flap, and never seemed to make that much difference to be honest....

Reed_Richards

37pisntenough said:

bob2302 said:

37pisntenough said:

Gerry1 said:

What's the make and model number of each heater?

Does each heater have one mains connection or two?

They are Heatstore model HSDHHR125.

These have a capacity of  19.3 kWh; if you are charging 4 at £25 a night, that implies a unit rate of at least 32p/kwh.

I'm not sure about you arithmetic here!

4x19.3 = 77.2kwh total

That is charged over 7 hours which implies a rate of less than11p per kwh (77.2 divided by 7). The rate is actually 15p per kwh so maybe it costs me more than I thought.

77.2 kWh total, 15p per kWh so the total cost should be 77.2 x 15 p = 1158p = £11.58

If you divide 77.2 by 7 you just get the power that is being drawn by your heaters, just over 11 kW.  That's assuming it takes the full 7 hours to charge them, probably they draw more power and charge faster.  But kWh is what you pay for, check your bill!