Can someone help me with some maths?
Out of curiosity, I rang EDF to find out if heating your water ALL NIGHT on the cheaper rate was a false economy.
- Day rate: 13 centimes per unit
- Night rate: 9 centimes per unit
One unit is 1kw.
It takes 2.5 kw per hour to heat the tank.
So, how much do you spend if you:
a) leave the water on for two hours on the day tariff
b) leave the water on for 8 hours on the night tariff
By my calculation I have three red apples and two green ones.
Can anyone help me with this please?