I lost it!

Mark Eatherton1

that neither of those bays has any representation of insulation in it. That changes every thing.

ME

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Jeff Lawrence_24

need some information

A while ago, someone posted a picture or two of an infrared comparision picture of using plates versus not using plates. I thought I had saved it, but can't find it.

Can someone please re-post it or send me a link? I recall that Siggy had done the research and this was a repost of it. I could be wrong on that, though.

Thanks.

hr

This article

Raised some blood pressure in the industry

http://www.pmmag.com/CDA/ArticleInformation/features/BNP__Features__Item/0,2379,80254,00.html

Try Dale at Radiant Engineering. He has some FEA graphs comparing output differences also.

hot rod

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Jeff Lawrence_24

Thanks.

Thanks Hot Rod. That was the article I wa looking for, but I need the infrared picture that does the comparision between plates and no-plates.

J.

Jeff Lawrence_24

I found it!

The last stinkin' disk I found in a pile in the back of a drawer in the desk had what I was looking for.

Thanks.

J.

jim f

INSULATION

on the left side of the chart says 4" fiberglass insulation on both comparisions
jim f.

Bob Gagnon plumbing and heating

how would the infrared picture look

if there were 4 pipes in the staple up bay. bob

bruce pirger

Forwhatever it's worth...I think those pictures are results of models, not true an actual images. However, they are probably pretty accurate. (I could be wrong...but sure likes like a model output to me)

More tubes I'd think would be just what you'd expect...4 "peaks" and corresponding valleys. Lower temp water could be used.

Are you considering 4 tubes in a 16" joist bay? 4" on center?

Bob Gagnon plumbing and heating

i do install

my staple up 4" on center near the outside walls. i feel i get a lot more heat output that way. bob

Larry Ticknor

I would question

how accurate that picture is because it shows the btu's traveling further into the insulation than into the plywood. I use an R-value of about 1.2 per inch for plywood and 3.5 per inch for fiberglas insulation. If the R-value has anything to do with the heat movement, it should be traveling faster through the plywood than the insulation. But maybe I'm missing something.

Larry Ticknor