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Old 05-07-12, 06:41 PM   #11
AC_Hacker
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Quote:
Originally Posted by lucerne96 View Post
I am planning a low heat project now. The plan is to run PEX ALU under a standing seam metal roof, pull off the heat & bring it inside a super insulated building for underfloor heating. Building is R70 roof, R 50 walls, R40 under the slab in Philadelphia, PA area. Double stud wall construction - no thermal bridges. .6 ACH
Sounds like you're doing it right.


Here is a report that concerns a project that is similar to yours, you might find it very interesting.

Please keep us posted on your progress!

Best.

-AC

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Old 05-15-12, 08:22 PM   #12
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Quote:
Originally Posted by lucerne96 View Post
I am planning a low heat project now. The plan is to run PEX ALU under a standing seam metal roof, pull off the heat & bring it inside a super insulated building for underfloor heating. Building is R70 roof, R 50 walls, R40 under the slab in Philadelphia, PA area. Double stud wall construction - no thermal bridges. .6 ACH
A house insulated that well has enough thermal storage from its own mass to make it through a cold night with little temperature drop. On the other hand, you may be surprised at just how little heat you will get from PEX tubing under a metal roof.
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Old 05-15-12, 09:02 PM   #13
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I built a 100 sq ft playhouse for my daughter 2 years ago with this methodology. 2 adults or 4 children supply enough body heat to keep it warm in winter w/o a proper heater required. I used reflective additive to the interior paint. You can feel the difference on your skin just by putting your hand next to the wall..
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Old 08-08-14, 02:48 PM   #14
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Default Low Temperature Hydronic Heating Webinar...

I was thrashing about on this site and came across this webinar that will be on 8/26/14:


It is being given by John Siegenthaler. If you are an enthusiast of radiant heating, you already know who this is... maybe own a book or two by him.

He is highly respected in the industry, and his books are pretty much the last word in reliable hydronic heating information.

In my opinion, he could go farther into low temperature heating, than he has in the past. His usual audience consists of tradesmen who are building systems from available assemblies, and this may be what is holding him back... he still has one foot in the fossil fuel era.

In fact, I even wrote to him about this very thing... he didn't write back, but I remain undaunted.

This should be a very interesting presentation.

BTW, I have discovered that you can run an audio-recording program in the background, and simultaniously capture screenshots (there's even a button in the webinar viewer), for later consideration.

Some of the organizations that have webinars (Caleffi for instance) archive webinars either on their own site or on YouTube.

This is a painless way to gain very useful information.

-AC
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Old 02-22-15, 10:00 AM   #15
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Default Technical Report: Low Temperature Heating Systems

I came across another paper, presumably from the LowEx Consortium.

I can't tell when it was published, but in the reference citation section, the most recent date is 1999.

The report is called: Low Temperature Heating Systems.

Unfortunately, the PDF document does not allow text-copy, but the CONCLUSION section reads as follows:


Best,

-AC_Hacker
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Old 02-22-15, 12:01 PM   #16
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Default I Found the Guidebook!

I was finally able to locate the mythical LowEx Guidebook!

I had to drag it, kicking and screaming, from the dust bin of history.

HERE_IT_IS.

Best,

-AC

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