[time-nuts] Thermal insulation choice?

[Eric Garner]

I mostly like it because it's easy to use, and _doesn't_ insulate too
well. you can add/subtract what you like to find the performance you
are happy with.

it also has the advantage that it doesn't degrade into garbage like
some closed cell foams do, and is really easy to work with

-Eric

On Fri, Jan 6, 2012 at 12:00 PM, Poul-Henning Kamp <phk at phk.freebsd.dk> wrote:
> In message <CABqdsz-HOHH8EhsPfM0AA6iw-AR6DLJt2UxVxqhBtQtmwyK2jA at mail.gmail.com>
> , Eric Garner writes:
>
>>I've used "Reflectix" duct insulation in applications like this. it's
>>essentially bubble wrap with a reflective layer, you can layer it
>>pretty easily to add/subtract from the insulation value. plus is comes
>>in small, cheap rolls
>
> Be aware that most of the (claimed!) insulation in these kind of
> materials come from the radiation reflection and is contingent on
> there being a huge-ish temperature difference between the two sides
> *and* that the material is not in contact surfaces, certainly not
> on the hot side.
>
> Where this material really wins is under roofs, which can become 100C or
> warmer, while you want to maintain 20C inside the house.
>
> They suck if you have 20C on one side and 32C on the other.
>
> Compared to bubble-wrap, it is unlikely to perform any different
> in an application like this, because of the low temperature differences.
>
> --
> Poul-Henning Kamp       | UNIX since Zilog Zeus 3.20
> phk at FreeBSD.ORG         | TCP/IP since RFC 956
> FreeBSD committer       | BSD since 4.3-tahoe
> Never attribute to malice what can adequately be explained by incompetence.
>
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.



-- 
--Eric
_________________________________________
Eric Garner