Hi as the title says 17th century stone cottage rural location which now has a oil burning boiler, Carn't help but thinking the has got to be a better way of heating this house 2 bedroom but 5m sq rooms.. just paid £350 for 600 litres of oil which i was told will not heat my house for more than 7 or 8 weeks epc rating on the house is D.   Is ASHP a possibility ? epc rating low or should i just bite the bullet and put electric boiler in.   House is double glazed roof is insula