write an executive summary for the following:     Plumbing is an extremely important component in the constructing of a net zero building.  There are several aspects that directly contribute to a healthy indoor environment and a net-zero building. The following apply to our design:
6.1 Reducing Water Demand 
In 2009, Canadian households used 3,689 million cubic metres of water as per Statistic Canada. Since a net zero design aims to preserve the quality and quantity of natural water resources, we will introduce measures to reduce this usage volume in our design (Government of Canada Analysis).

In Canada, the largest household water use of all indoor water use is the toilet. Toilets water usage makes about 31% of the total indoor water consumed. In our design, we aim to conserve water in toilet usage to reduce the impact on the natural environment and achieve a net zero design.  This concept is not new and has been evolving over the years driven by cost. Toilets that date prior to 1994 had a flush volume of 5-7 gallons per flush, and toilet after 1994 varies between 1.28 to 1.6 gallons per flush.  For our design, we chose a dual flush American Standard toilet type. The following is information about three different toilet types (Envirostats, 2015). 



If we are to compare the dual flush toilet to the standard single flush toilet by taking 5 as the average flush per day, we have 30% of water saving in a year per capita.


					

The cost of water per use is $2.299/ m3 for the balance of cubic metres except prop