Re: Radiant Floor Heat Water Heater ? - Page 2

 

Why would the water be "contaminated"?


One might flush the tubing every fall...


Ah yes. Tradition :-)


The floor is fairly low temp, and no heating occurs there...


Every so often, Mr. Solar, who lives with very hard water, flushes his
entire hot water system with a mild acid. Opens the taps, puts a bucket
in the sewer line and pumps the acid back into the water heater for
a few hours. No big deal.


"Look there! No proper boiler! They must be mad!"

Nick

 

Nick, please?  Water can be contaminated for various reasons and water
laying there for half a years tend to be prime for contamination.


Nuck, Please?  No one wants to flush a system every year.  the average old
person in a house is going to do that?  Or they incur charges to get a
plumber to flush it.  Totally unnecessary if installed correctly.


Tradition of having the probably the best quality water in the world, and
one of safety regulations that prevent backflow (contamination) into potable
water mains pipes.  The tanks in the attics creates an air break that
prevents water back siphoning, among giving a wonderful reserve of water in
case of a water outage and a constant head of water up there.


It can still buld up.


In a sealed heating/water system a one litre can of inhibitor is all you
need every 5 years.  No strong acid or the likes.


Have a close look at European boilers ( a misnomer from Victorian days as
they don't boil). They totally outstrip US attempts in size efficiency and
applied technology.  A small box on the kitchen wall will supply all your
hydronic heating and on-demand hot water too.  have a look at:

http://www.eco-hometec.co.uk   Rebadged MAN (the diesel and truck maker)
boilers from Germany.

The US lead in forced air, which is not popular in Europe as basically we
didn't know how to design and fit them in residential houses. By the time we
figured it out the damage had been done in image.


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Maybe it's the "far reaches" part. How far is a "far reach"?


So... we seal some pure water up in a jar with a few copper ions, put
it aside for a year, open it up, and voila, "contamination." OK :-) But
suppose the floor has some fresh water flowing through it all year,
some fraction of the potable water consumed in the house...


You mean "if needlessly overcomplicated with a heat exchanger"? :-)


Long may you wave.


Would you have any evidence for this article of faith?
Anyone you know need to descale hot water pipes often?


As I recall, Europeans perfected condensing gas boilers 35 years ago...

Nick

 

The parts that stays stagnant in summer.


No we don't seal up water in a jar.  We look at why the regulations are so
strict. They are strict because contamination in the past tightened the
regulations up as time progressed.  All for a reason.


If the heating system is off all summer no flow will be through the heating
pipes.  What are going to do?  Have a pump working 24-7 to keep the flow?


No!  installed correctly to prevent water contamination.  Coiled heat
exchangers in cylinders are not expensive or complicated at all.  They are
quite dumb with no moving parts - just a coil of copper inside a cylinder.
In the UK they are standard and available at the local plumbers merchants.


And that we agree on.


Yes.  Being experienced in the game.


Over here?  No.  As we have tighter regulations than elsewhere.


The Dutch did research on condensing boilers in the 1950s.  They never
really took off until 15-20 years ago. In Holland 95% plus of all boilers
are condensing boilers. The UK is slow to take them up as they are slightly
more expensive and produce an exhaust plume.  Legislation in the UK in a few
years time means that all boilers sold will be condensing boilers as the
minimum efficiency of boilers is being raised from 78% to 86%.

The lower the return temperature the more efficient they are.
Microprocessor control of many of these boilers, complete with load
compensation control, aims to reduce the return temperature as much as
possible.



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 What is a condensing gas boiler ?
Thanks,
Iowa883


propose.