Boiler/CH/Pluming layout for a house + long extension

[moorfield]

Hello All, hoping you can offer some advice on solving this puzzle, almost there but would really appreciate your views !

We have recently bought an old 4-bed farmhouse with a 20m x 4m single storey outhouse extension on the back of it - ie very long narrow building - used to be stables, barn etc.
We are in the process of refurnishing it converting into habitable space containing a bathroom, kitchen and underfloor heating throughout. In addition the main house has a utility kitchen and upstairs bathroom.

So the big question now is how do we rejig the boiler / central heating / plumbing layout to serve the whole house + 20m extension ???

Heres a couple of questions about what we want to do ...

1. Put a new condensing boiler in the house which can serve both house + 20m extension, ideally
each operating on separate circuits. Boiler recommendations ?

2. Move the hot water tank in the house so it will be in a bedroom with floor level slightly below (30cms) that of the bathroom. Will that be a problem ? - want a power shower in the bathroom.

3.Bathroom in the single storey extension will be approx. 13m horizontal distance from the boiler and tank - so quite a long run for the hot water / bath supply which I guess we can't avoid but what about a shower - would best option be electric or power shower here ?


Thanks.

[uug197h]

1 if your putting a kitchen in the out building i would put a combi boiler in there as well

2 new condensing boiler for main house will get rid of the hot water tank (combi / condensing boilers don't have a storage tank)

3 power showers, you can not have a power shower (pump) with a combi/condensing boiler, if you have 2 boilers 1 main house 1 out building a thermostatic shower for each would be ok

[markfxy]

dont use a combi use an unvented cylinder with a secondary return pump to give instant hot water a combi should only be used if the hot water draw offs are reasonably close to boiler to eliminate running off large amounts of cold water before getting hot water to tap