Andy Hall wrote in message . ..

The pool water won't generally have concentrations of chemicals enough
to damage the heating system directly (humans swim in it). However,
the risk would be from oxygen being continuously introduced into the
heating circuit.

Luckily, the underfloor heating doesn't work unless you close the
valves to the pool. (The water would just have pool temperature.) It
also appears the valves for the heating have been closed when the pool
was heated. Therefore, oxygen and pool chemicals should only have been
introduced when they switched between pool and underfloor heating.
(Spring/autumn)

I would expect that flushing it through with fresh water and refilling
would be adequate.

That's wonderful news!

----------
Bob Minchin wrote:

Heat pumps for heating are pretty rare in the UK apart from ultra high
efficiency 'green' specialist installations.

The standard heating in Sweden is electrical radiators, but this house
was built by someone with a special interest in heating solutions. UFH
was almost unheard of in Sweden when this house was built a few years
ago. In addition to the heat pump, there is a back up system with
electric heating. There are also connections for solar collectors, but
no solar collectors. Additionally, it looks like the house is prepared
for air conditioning and/or air heating.

If pool water has got into the UFH then I can't imagine it has done much
harm.

Again, that's great news.

So it looks like you will be spending a fair bit but I guess with the
knowledge of the history of the property, you would have got it
cheaply
and would be expecting some bills.

Yes, bills were expected and the price was a bit lower than it would
have been if the house was finished and didn't have any problems. But
the heating system was among the things that were supposed to be
working.

/Clas-Henrik