Question: how much does it cost to change to a combi boiler?
Answer: A new combi or system boiler will cost between £600 - £850 for a budget model, £800 - £1,100 for a mid-range model and £900 - £2,000 for a premium model depending on boiler size. A heat-only boiler will cost between £500 - £1,500 according to size and quality.