In boiler recommendations Ravenheat doesn't appear and is even indicated as to avoid. My daughter needs a new boiler and I recommended a Worcester Bosch, however money is tight for her and there is a 32Kw Ravenheat Combi on offer for £580 plus VAT including flue and timer and 3 year warranty. If you experienced Gas Fitters say do not touch with a barge pole then I would not steer her towards it, however if for the price it is worth it then it may be something to consider.