I have been quoted £2200 to install ( new install not replacement ) a Potterton Suprima Boiler with new expansion tank and replacement hot water storage tank. When I searched for info on the Potterton Suprima they were several bad reviews. Is this not a good boiler and if so what are the alternatives in a similar price bracket? Also it was suggested that it is installed in the airing cupboard which does have an outside wall. Is this a good location for it?