Economic Insulation Thickness

Heat loss depends on:

• the range of ambient conditions at the site location;

• the type of insulation;

• insulation thickness;

• cladding emissivity;

It can generally be assumed that the amount of energy lost is replaced by fuel used at ~80% efficiency. The installed cost ofinsulation should be used, not just material cost, for comparison with the energy cost.

On existing installations, it is good practice to carry out a thermal imaging survey in order to calculate the economic incentives for insulation and re- insulation, and also to prioritize the work.

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