Which Boiler System?

Hi, Combis are great if you don't want an airing cupboard and you don't place too heavy a burden on the hot water system. The bigger ones ( 42Kw) give you up to 15 litres per min of water at around 60 degrees C at the tap. That is around three gallons which is just about reasonable when mixed with cold for a bath. If at the same time you run the hot water in the kitchen and maybe in a basin you are really going to struggle. In my opinion with children and all the rest you might be better to have a new boiler and buy one of the mains fed high pressure tanks which are heated by the radiator system rather like your present tank and have an electric back up facility for when the boiler is off. There are various different makes and sizes of which your plumber will be able to advise you. The advantage of these systems is that they are fed directly by the mains cold water and have much larger capacities than your present tank. The most common one carries up to 250 litres. You can, of course, get bigger or smaller. They are quite spenny costing around £400 and the plumber needs to be compliant to fit it. They are about five feet high so need a bit of space. Hope this helps. Regards, Guy.

Have an unvented/mega flo system in, 15/16/17 ltrs min mains pressure hot water,depending on having good flow DCW post the job and if your in southwest area we can help Kieran

Hi, The system you have at present is better than a combi boiler. If I was you I would merely upgrade the boiler. Or, if costs permit, go for a sealed system boiler with an unvented cylinder in your cupboard. I have fitted 100s of combi over the yrs, but never had one in any of my own properties. Thats just an opinion though, as some people will swear by combis. Regards, Jack.

hi, i agree with previous statements for your property with the hot water demand an unvented hot water and central heating system is the best option. will cost a bit more to put in but worth it in the long run. hope this is helpful adrian