1. D&R International Ltd. 2011 Buildings Energy Data Book. Buildings Energy Data Book. [Online] March 2012. [Cited: May 23, 2014.] http://buildingsdatabook.eren.doe.gov/docs%5CDataBooks%5C2011_BEDB.pdf.
2. Office of Energy Efficiency & Renewable Energy. Hot Showers, Fresh Laundry, Clean Dishes. U.S. Department of Energy. [Online] March 5, 2013. [Cited: May 23, 2014.] http://energy.gov/eere/buildings/articles/hot-showers-fresh-laundry-clean-dishes.
3. 2006 Building Code—Supplementary Standards. Supplementary Standard SB-12 Energy Efficiency for Housing;Ministry of Municipal Affairs and Housing Building and Development Branch,2013
4. Test Method for Measuring Efficiency and Pressure Loss of Drain Water Heat Recovery Units;Standards, CSA,2012
5. Heat Exchanger Thermal and Pressure-Drop Design. Compact Heat Exchangers;Kays,1984