1. Baxter, Van D., Murphy, R.W., Rice Keith C., Linkous R.L., 2016. High Efficiency Water heater Technology Development – Final Report: Part I, lab/Field Performance Evaluation and Accelerated Life Testing of a Hybrid Electric Heat Pump Water Heater. Oak Ridge National Laboratory, April 2016.
2. CA-AB 32, 2016. California Assembly Bill No.32, 〈https://www.arb.ca.gov/cc/ab32/ab32.htm〉, (Accessed 26 September 2016).
3. California Air Resources Board, 2016. California Greenhouse Gas Emission Inventory – 2016 Edition, 〈https://www.arb.ca.gov/cc/inventory/data/data.htm〉 (Accessed 28 November 2016).
4. CA-BEES, 2013. California Building Energy Efficiency Standards, 2013. High-efficiency Water Heater Ready. 2013, October 2011.
5. California Building Energy Efficiency Standards, 2016. Residential Instantaneous Water heaters. 2016, July-2014.