hi, i have fitted many boilers and i have a sime 80e, all the sime boilers that i fitted have had problems ie diverter valves
need repairs the odd pump replacement and on the 100 e andthe 80e a fault on the ingition pc board but never had to change the heat exchanger, so if the boiler is only in need of a diverter valve or a heat exchanger this should keep you going for a few more years if they aer fitted in by a good fitter ie[ NO]! leaks. the best boilers in my mind are the worchester bosch 28i with out question. Ifyour happy with the sime when it is working then why change?,If you have lots of cash then the 28i is the best,I say that the heat exchanger is probiliy still in very good condition and only needs attention to the diverter valve.hope this is of some help to you. keep smiling bob.
bob roberts, January 2006