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Published byTerrence Rady Modified over 10 years ago
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Recognizing Success Energy Use & Greenhouse Gas Emissions in Canadian Homes 1990 – 2010 Canadian Renovators’ Council, October 2012
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Three Part Report: CHBA’s Annual update on Residential Sector performance. Closer examination of how new homes have changed based on CHBA/CanmetENERGY analysis. Future potential for energy retrofitting.
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Residential Share of Canada’s GHGs 19902010 Source: NIR/EC 2012
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Sector Changes in GHG Emissions 1990 - 2009 Source: CEUD 2012
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Trends in Stock and Energy Use 1990 = 0 Source: CEUD 2012
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Energy Intensity Trends 1990 = 0 Source: CEUD 2012
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Efficiency Trends by House Vintage
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How Have New Homes Changed?
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Comparing “Apples to Apples” Total stock trends are useful, but they don’t tell us much about how new homes have changed over time. Existing home energy performance is a ‘moving target’. When comparing old and new homes, what do we learn if we base this on the ‘as built’, rather than ‘as found’ specifications?
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Our “Apple” 2,100 sq. ft. two-storey home in Ottawa circa 1973 (Four-Square). Initial “As Built” specifications from CMHC/HUDAC costing studies of that time. Additional specifications generated by CanmentENERGY, OBC 2012, R-2000 (2012). Only envelope and mechanical specifications altered to those ‘typical’ of new construction in each period. ‘As Found’ specifications from initial (pre-grant) ERS evaluation. All data generated using HOT2000 V. 10.51
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‘As Built’ = ERS 41 ‘As Found’ = ERS 63 = 28.7% improvement ‘Post ecoENERGY Grant’ = ERS 72 = 44.5% improvement Same home built to 2012 OBC would consume 66% less energy than mid-1970s spec.
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EnerGuide Ratings & Percentage Efficiency Gain Vintage‘As Built’‘As Found’Post ecoEnergy 1961 - 1977ERS 41ERS 63 (+28.7%)ERS 72 (+44.5%) 1978 - 1983ERS 57ERS 66 (+20.8%)ERS 74 (+38.9%) 1984 - 1990ERS 65ERS 69 (+11.5%)ERS 75 (+28.2%) 1991 - 1997ERS 69ERS 69 nilERS 76 (+21.4%) 1998 - 2005ERS 71ERS 71 nilERS 76 (+17.6%) 2006 - 2011ERS 76ERS 76 nilERS 78 (+8.6%) 2012 OBCERS 79
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Some ‘Low Hanging Fruit’ Remains
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Filling Out the Household Picture: a 69’ Chevy Impala in the driveway
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So How’s Detroit Doing? 1969 Chevy Impala2012 Chevy Impala
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15.8% Improvement in 43 Years
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... and the Impala’s a ‘success story’ Manufacturer/ModelEPA 1978 (with 2008 correction) EPA 2012 Ford/Mustang23 mpg/Combined23 mpg/combined Honda/Accord26 mpg/combined27 mpg/combined Toyota/Corolla29 mpg/combined30 mpg/combined
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On “Apples to Apples” Basis: 15.8% Increase in ‘Combined’ Fuel Efficiency 66% decrease in total energy consumption (ERS 41 to ERS 79) 78.5% decrease in space heating energy consumption
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Questions/Discussion?
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