"Ian Stirling" wrote in message
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Tom wrote:

"IMM" wrote in message
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"Rick Dipper" wrote in message
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More is always better.

Except around a pipe!!

Even around a pipe, but to a much, much lower degree.

On a pipe, I assume the surface area of the insulation increases by a factor
of approx 6.3 times the thickness of the insulation, I'm afraid my maths is
not good enough to work out at which point it starts to be non effective.
Perhaps there are some mathematicians out there that can help on this one.?
Tom