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Excessive heat build-up - Page 4

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Posted by nicksanspam on March 2, 2006, 6:32 pm

Why not ask if you can turn off the pump?


Posted by SJC on March 3, 2006, 4:46 am

  If you notice the original posting, it was about an "open loop" =
I don't think Alan's definition of this would pass certification, let =
getting a contractor to install it.
  To the best of my knowledge,  you can not connect radiant and =
to the water main. Personally, I would not want to shower in water that =
gone through a floor radiant and collector system.  

Posted by Alan on March 3, 2006, 4:36 pm
The potential health issue of the "open loop" is a new discovery.  The
architects downtown at the planning department were thrilled with the
design when it got approved, so this fear of microbes is probably
overblown.  But, actually, I have considered the second tank as a
glycol filled one, basically one that circulates through the solar
collector and radiant floor, with a heat exchanger bringing heat from
the hot water heater to ensure the radiant floor gets good heat any
time it's needed.  So, I'd change a bit of my existing system, but I'm
not really in a rush to do so.  I really don't see what's wrong with
showering in water that runs through the potable water tubing of the
radiant floor, unless I were a person with an already compromised
respiratory immune system maybe.

Posted by SJC on March 3, 2006, 4:39 pm

  I am glad you got it approved. Good luck with that.

Posted by Alan on March 2, 2006, 6:17 pm
 This is true.  I've been studying the second tank issue.  Even a glass
lined heat exchanger tank is surprisingly costly, nearly as much as the
roof solar collector system.  As for idle collectors issue, the cost
benefit comes in winter, not summer.  I'll spend upwards of $00- per
month on natural gas during the deep of winter now, and if I install
radiant flooring to the raised foundation/hardwood floor area, the
costs could be even higher.  In summer, natural gas costs are as low as
$0- a month.  So, I'd try to use the summer heat, but to get winter
heat, having a sizeable system seems important.  The second tank, heat
exchanger system is something I'm looking into, but the prices need to
come down.  I'm not willing to take out a second mortgage to cover
these costs.

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