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AC_Hacker · 06-11-12, 12:42 PM

Mr. Bean,

Thanks for joining the discussion.

We have a thread on Exergy HERE that I started, where I tried to introduce some of the aspects of Exergy. Sometimes it's a bit of a tough sell. If you'd care to contribute to that thread, consider yourself invited.

Also, the issue of exergy, and how to design a low exergy radiant floor is certainly appropriate to this thread.

Having looked at quite a large number of radiant floor web sites, I have concluded that most of them assume that fossil fuel will be the heat source, and then all the high-exergy rules of thumb flow from that, wide PEX spacing, under-subfloor installation, etc.

I looked at your page on Low-Exergy Energy • Efficiency • Entropy • Exergy • Efficacy, and it's great, just great.

If you would be so kind, I'd be interested in hearing what you have to say about designing & building a low-exergy radiant floor, as that is my main DIY project this summer.

My current thinking is to use 1/2" PEX on 6" centers, and use extruded plates (flange up) over high-density rigid insulating board (which I have yet to locate), with 1/4" Hardie-backer over that and topping that with linoleum.

Your thoughts?

-AC_Hacker

06-11-12, 12:42 PM	#241
AC_Hacker Supreme EcoRenovator Join Date: Mar 2009 Location: Portland, OR Posts: 4,004 Thanks: 303 Thanked 723 Times in 534 Posts	Mr. Bean, Thanks for joining the discussion. We have a thread on Exergy HERE that I started, where I tried to introduce some of the aspects of Exergy. Sometimes it's a bit of a tough sell. If you'd care to contribute to that thread, consider yourself invited. Also, the issue of exergy, and how to design a low exergy radiant floor is certainly appropriate to this thread. Having looked at quite a large number of radiant floor web sites, I have concluded that most of them assume that fossil fuel will be the heat source, and then all the high-exergy rules of thumb flow from that, wide PEX spacing, under-subfloor installation, etc. I looked at your page on Low-Exergy Energy • Efficiency • Entropy • Exergy • Efficacy, and it's great, just great. If you would be so kind, I'd be interested in hearing what you have to say about designing & building a low-exergy radiant floor, as that is my main DIY project this summer. My current thinking is to use 1/2" PEX on 6" centers, and use extruded plates (flange up) over high-density rigid insulating board (which I have yet to locate), with 1/4" Hardie-backer over that and topping that with linoleum. Your thoughts? -AC_Hacker __________________ I'm not an HVAC technician. In fact, I'm barely even a hacker...