Problem is the coils in the floor ARE the heat exchange
surfaces.

Don Lee wrote in message
news:VE4qd.369273$%k.209169@pd7tw2no...
If adding a heat exchanger can solve the rusting problem, are there
boilers
already with a stainless steel heat exchanger built-in to save space?
Also,
by using a heat exchanger, then all those by-pass loops and mixing valve
can
be excluded, correct?

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"Ed Clarke" wrote in message
...
In article akXpd.358129$nl.343990@pd7tw3no, Don Lee wrote:
Seems like the Canadian action only covers for replacement and leaks
from
the acetal joints which apparantly are rare. There is really not much
I
can
do about the infloor tubings since the only way to replace them would
be
jack hammering the whole house !! Oxygen permeability seems to be the
biggest concern. Again, not much I can do about that until the boiler
leaks. I wonder if oxygen scavengers/rust inhibitors would help.

This would help mo



http://www.houseneeds.com/shop/Heati.../heatexchanger
s/heatexchangerindex.htm

You'll need pumps on both sides.