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: 
	Reducing water demand by employing innovative technologies.
https://www150.statcan.gc.ca/NAME_1/pub/11-526-x/2013001/part-partie1-eng.htm
In 2009, Canadian household used 3,689 million cubic meters of water as per Statistic Canada. Since a net zero design aim to preserve the quality and quantity of natural water resources, we will introduce measure to reduce this usage volume in our design.
In Canada, the largest household water use of all the indoor water use is toilet. (https://www150.statcan.gc.ca/NAME_1/pub/16-002-x/2008003/article/10686-eng.htm).  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 have been evolving over the years driven by cost. Toilet that date prior to 1994 had a flush volume of 5-7 gallon per flush, and toilet after the 1994 varies between 1.28 to 1.6 gallon per flush.  For our design, we chose a dual flush American Standard toilet type. The following are information about three different toilet type.  
Toilet Type	Bowl Shape	Flush	Buying Cost	Installation Cost	Liter per Flush	Liter/day. Capita	Liter/year
*365 days
1-High Efficiency
A Give two different versions of responses. Please separate the responses with 6 asterisk symbols: ******.
user