pex heat loss

jim lockard

how would I figure the heat loss per foot for pex piping.3/4 pex pipe for dom. hot water@130 degrees F pipe runs thur a crawl space @ 34degrees. What would the heat loss per foot be? Thanks. Jim Lockard

hr

At a 1 GPM flow

Siggy's HDS program shows copper M at about 4100 btu/ 100 foot run. Probably a tad less for pex?

hot rod

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Scott Gregg

34* Crawl?!

> how would I figure the heat loss per foot for pex

> piping.3/4 pex pipe for dom. hot water@130

> degrees F pipe runs thur a crawl space @

> 34degrees. What would the heat loss per foot be?

> Thanks. Jim Lockard



Time to insulate and seal it! That seems like way too cold for a crawl space and asking for trouble.

jim lockard

cold

I agree I am just trying to answer a question. thanks J.Lockard

Tim P._2

Actually I am interested in the answer as well.

Isn't what makes copper give of so many btu's it's "K factor"?

I would imagine the K factor, or ability to transfer heat, is much less with pex.

On two runs, one copper, one pex, my gut tells me the pex would not lose as many btu's.

Anybody have any facts on the matter?