1 World Solar

Sorry but this is a 'how long is a piece of string' type question, because it depends on how many showers per day, shower flow rate and how your hot water is provided. In the case of new build the the SAP rating will predict the savings in terms of money and CO2. We can also send on request a calculation tool, so you can work it out for your own circumstances. However as a general rule people are telling us that is more cost effective than solar hot water heating, but with no electrical controls, pumps or servicing requirements.