Freud wrote:
Hi:
We're remodeling the bathroom in our small 1930s house. I'd like to
put radiant heating in to replace the radiator that's there now. From
my reading, I'm thinking of adding loops of oxygen-barrier PEX under
the floor (easily accessible from the unfinished basement) and tying
it into our existing natural gas hot water boiler radiator system.
The system is closed loop with iron pipes and radiators. I was
thinking of using heat spreaders & then insulating below the tubing.
Does anyone have any advice on this? Am I likely to need a tempering
valve to reduce the temperature of the water in the system? Are heat
spreaders unnecessary? Any problems with tying into the iron pipes?
Thanks in advance,
Freud

If its closed loop system how can you add a tempering valve to lower the
temp to the loop? You would have to dump water out of the system to put cold
water (that has disolved oxygen in it) back in and then get the air out of
that? Am I missing something?

I like idea of radiant heat but not in your case.

Rich