Hi, I've got a firm coming out next week to give me a quote for upgrading my gas central heating boiler. At present my system consists of a Potterton Netaheat boiler (about 15years old) with head tank feeding 11 radiators. Hot water is supplied via the same boiler and conventional hotwater tank. There are two motorised valves (1 for hot water, other for central heating) and a hall mounted thermostat and kitchen mounted controller. The boiler itself is out in the garage. Over the past 5 years I have replaced 7 of the radiators. I intend to get the boiler replaced, controller , 4 remaining old style radiators and also reposition the thermostat. Our system demands are fairly straightforward, we run two power showers (mostly morning use) and two to three baths worth of water in the evening one after the other, usually! Up until now I've carried out all repairs myself with exception of boiler work.
Which sort of boiler would be advised? Any particular makes better than others? Any questions that I should be asking of the firm? Likely ballpark cost?
thanks in anticipation,
David