g-dl">
<dt>NB</dt><dd>The nominal bore diameter of flow or return in mm. You can add more diameters (rows) using the <b>Add diameter</b> button below.</dd>
<dt>Capacity</dt><dd>The power that can be transmitted by a flow/return pair of this nominal bore. If you don't fill this in, the cell will show THERMOS' estimate, which is controlled by the capacity &amp; loss model below.</dd>
<dt>Losses</dt><dd>The heat losses THERMOS estimates for a flow/return pair per meter. Again, you can enter your own values her