Suggest you do not buy one of these boilers. I long for a boiler which is not temperamental, reliable and fitted by someone who knows what they are doing. I am told Worcester are good or Ideal. Will be moving later this year. You can rely on one thing - I will not be choosing Ferroli. This one was chosen for me, my mother and my mother's friend by the same engineer. Expensive lesson. Four days without heating or hot water over the long Easter bank holiday.