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HPWH Performance Report 11. Rheem Site Descriptions and Performance We completed installations of 5 Rheem integrated units at two Kelowna and three Vancouver Island sites. On average the units performed with an aCOP of 1.83 with average ambient temperatures of 60.4°F and daily water draws of 204 litres per day. One unit (Kelowna Site 3) is unducted and draws air from a conditioned space. The remaining units are ducted to bring in outside air. 11.1 Kelowna Site 3 (Rheem) Observed data: The Kelowna Site 3 is a 303-litre (80-gallon) Rheem unit which performed with a COP of 2.08 over 457 days with an average room temperature of 20.6°C (69.1°F). This site performed better than all other integrated Rheem units mainly due to the unit being located in a conditioned basement and having steadily warm air to draw heat from. Site Unit Type Tank Size (gal) Beginning Date Ending Date Days of Monitoring Period Kelowna Site 3 Rheem 303-L [80-gal] 11/3/16 175 LPD [46 GPD] 2/16/18 51.4°C [125°F] 457 10.5°C [51°F] Site COP Average Inlet Air Temp Average Water Flow Average Hot Water Temp Average Inlet Water Temp (°F) Kelowna Site 3 20.6°C 2.08 [69.1°F] Figure 48: Kelowna Site 3 Monthly Performance 3 2 1 2.26 2.25 June July Average Air Temperature 40 35 30 1.99 25 20 15 10 2.17 2.14 February 2.08 April 2.19 2.11 September 1.96 1.94 1.9 0 January 2.04 October 3 November 5 0 -5 -10 March May COP August December 51 COP Ambient Air Temperature (°C)PDF Image | CO2 Integrated Heat Pump Water Heater
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