I'm nearing the end of my project to remodel an en-suite bathroom. Once
it's done I'm going to demolish the main bathroom, airing cupboard and
laundry (sensible place for a laundry IMO, the bathroom), and rebuild
with the stud walls in different places. This means we will be without
an airing cupboard for a while - with the the way I work, maybe a year.

In the en-suite there will be a floor to ceiling cupboard 450x450mm
which I've designed (eventually to hold towels and loo rolls etc). The
existing plastic pipes for the CH run behind it. I am thinking of
making a coil radiator in the bottom of this cupboard (I have a lot of
8mm copper left from another project) feeding the coil with a TRV at
the top of the cupboard, and return via a service valve. It'll only
get heat when the zone is called in the adjoining bedroom, but in the
winter that will be quite a bit.

Is there anything against me doing this? Anything I should consider?

R.