Central heating question

uktyler

We want to replace our central heating system (solid fuel, convection pumped, very old) with a ground source system. However we don't know how big a pump we need. We have a three bed house, aprrox 120sqm, solid walls and a poorly insulated loft, which we can't insulate any better. How big a pump will we need?
Thanks in advance.

robv_3

To keep their efficiency up their heat output is pretty low compared to most other heat sources, eg 35->45 degrees. You would need a huge GSHP or ASHP to heat a old house with multiple big radiators in every room. They are most suited to highly insulated houses with ufh.

Your best speaking to a supplier but I would be surprised if you find any company that would say your property is suitable.