A Green heating system is forcing some residents into fuel poverty according to campaigners. District heating provides heating and hot water to more than 200,000 households in England and Wales. The system works by way of a central boiler which provides energy to properties. Government wants 8 million homes to adopt the system by 2050. It's supposed to be cheaper and environmentally friendly. But 5 live Investigates has learned that some residents are paying more than they would with a conventional boiler and some systems are unreliable.