Roman drains with warm spring water could be used for eco-heating . The Romans also had a system of underground cisterns that were filled from the top down, and then emptied into open channels in the ground below. This waste water could be used to heat Bath Abbey in the historic city . Engineers are looking at drains to explore whether the idea is viable .
Roman drains with warm spring water could be used for eco-heating . 850,000 litres of waste spring water filters to Avon each day at present . This waste water could be used to heat Bath Abbey in the historic city . Engineers are looking at drains to explore whether the idea is viable .