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Phil L

wrote:
It's a lot more expensive than normal CWI, so much so that it will
never turn a profit - you will never save as much as it has cost for
installing,

You mean the return is less than mortgage interest rates? As long as
the return is higher than this wont it pay for itself eventually.
Also, if fuel prices rise wont the pay back time reduce?

thanks
Thomas

Conventional CWI takes decades to pay for itself, exterior insulation takes
much longer, because A) It costs more, and B) It's not as effective.

That's not to say it shouldn't be installed - the house will be warmer in
winter and cooler in summer, and this is the main thing, not saving money -
if saving money is your ultimate goal you are wasting your time bothering
because you won't save anything.