all any amount between 0 and 200m<sup>2</sup>, with the effect being pro-rata.</dd>
<dt>Maximum area</dt><dd>this determines the maximum insulatable area as a percentage of the overall area (described above under <b>Applies to</b>). This is to represent things like windows and doors in walls, which would not be covered by insulation.</dd>
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<p>
Finally you will need to <a href="#editing-systems">mark some buildings as eligible for insulation</a> using the candidate editor (described above).
</p>

<p>
I