Changes

<li> the efficiency of the pre-storage filter (η), and </li>

<li> the efficiency of the pre-storage filter (η), and </li>

<li> 0.05 </li></ul></p>

<li> 0.05 </li></ul></p>

<p>Five percent of the average annual demand (D_N) is calculated as the product of:

<p>Five percent of the average annual demand (D_0.05) is calculated as the product of:

<ul><li> The daily demand per person (P_d, in L)</li>

<ul><li> The daily demand per person (P_d, in L)</li>

<li> The number of occupants (n), and </li>

<li> The number of occupants (n), and </li>

<p>The following calculation is based upon two criteria:

<p>The following calculation is based upon two criteria:

<ol><li>A design rainfall depth is to be captured entirely by the RWH system.</li>

<ol><li>A design rainfall depth is to be captured entirely by the RWH system.</li>

<li>The average annual demand (D_N) is greater than the average annual yield (Y_R) coming from the catchment. </li></ol></p>

<li>The average annual demand (D_0.05) is greater than the average annual yield (Y_0.05) coming from the catchment. </li></ol></p>

<p>When Y_R/ D_N <0.33 <br>

<p>When Y_0.05/ D_0.05 <0.33 <br>

The total storage volume required (V_S, in L) is calculated as the product of:

The total storage volume required (V_S, in L) is calculated as the product of:

<ul>

<ul>

Filter efficiency can be reasonably estimated as 0.9 pending manufacturer’s information.  

Filter efficiency can be reasonably estimated as 0.9 pending manufacturer’s information.  

</p>

</p>

<p>When 0.33 < Y_R/ D_N <0.7 <br>

<p>When 0.33 < Y_0.05/ D_0.05 <0.7 <br>

The total storage required is the sum of V_S and Y_R.  

The total storage required is the sum of V_S and Y_0.05. </p>