new central heating system - Gravity or Mains fed system

[ambercelery]

Hi

I currently have a backboiler and want to replace this with a new boiler. My house is 4 bedroom and therefore i dont want a combination boiler.

Ideally I'd like to get the new boiler and tank moved into my loft so that I can remove the airing cupboard that the tank is currently in - and have the extra room in my upstairs bathroom. However, it this means settling for a worse system, I dont want to do that. (i can keep the airing cupboard with boiler/tank in if need be).

What do you suggest? What are the benefits of having a mains fed system other than having more space?
Is there much difference in running costs of the two systems?

Any recommendations greatly appreciated!!

 

[gas4you]

Check your mains pressure flow rate. If you have>= 3Bar and >= 18 litres/min flow then a mains unvented would be ok.

You will also, in an ideal world, need a 22mm cold feed to the mains cylinder.

Installation costs will be about 3-4 times more than vented but running costs will be about the same.

You also won't need power showers or shower pumps with the unvented.