Waste water heat recovery - cost £250 to £500 installed
Put simply, a heat exchanger wrapped around the waste pipe takes heat from your waste shower water (about 15°C) and puts it into the boiler’s supply feed, saving up to 70% of energy of the out-going waste water.
Typically there are two types of WWHR heat exchanger:
- tubular that replace a section of pipe
- helical or flat that can be mounted under the shower tray.