DairyCo

Water heating energy use and cost calculator

Your choice of water heating system should provide you with enough hot water and also maximize efficiency of energy usage saving you money. This calculator can be used to work out the energy consumption of different water heaters.

Electricity Cost Input
Day rate electricity	p/kWh
Night rate electricity	p/kWh

 

Input Data
Size of water heater / volume used per day	litres
Temperature of water	oC
Heater type / condition	Select Good - spray foam insulated Good - <5 years old, >50mm Rockwool insulation Average Poor - >10 years old, insulation deteriorated Plain cylinder with quilted jacked Plain cylinder with no insulation
HRU fitted	Select No HRU HRU & PHE HRU no PHE
% of night rate electricity used to heat water

 

Output Data
Actual energy use - kWh per day	Cost of electricity per day	Cost of electricity per year
-	-	-