The Energy Company Obligation (ECO) is a government project; it is also known as ECO grants. It is to provide support in domestic energy. This support improves domestic energy efficiency measures. The measures such as replacement of oil boiler with air source heat pump, replacement of less efficient LPG & gas boilers with new and more energy efficient boilers & electric storage heaters, cavity wall insulation, solid wall insulation, and loft insulation are the key focus.