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Recognizing Success. Energy Use & Greenhouse Gas Emissions in Canadian Homes 1990 – 2010 Canadian Renovators’ Council, October 2012. Three Part Report:. CHBA’s Annual update on Residential Sector performance.
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Recognizing Success Energy Use & Greenhouse Gas Emissions in Canadian Homes 1990 – 2010 Canadian Renovators’ Council, October 2012
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.
Residential Share of Canada’s GHGs 1990 2010 Source: NIR/EC 2012
Sector Changes in GHG Emissions1990 - 2009 Source: CEUD 2012
Trends in Stock and Energy Use1990 = 0 Source: CEUD 2012
Energy Intensity Trends1990 = 0 Source: CEUD 2012
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?
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
‘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.
Filling Out the Household Picture:a 69’ Chevy Impala in the driveway
So How’s Detroit Doing? 1969 Chevy Impala 2012 Chevy Impala
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