2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Total Cooling System Stock (thousands) | 2689.0 | 2783.0 | 2905.0 | 3006.0 | 3187.0 | 3338.0 | 3600.0 | 3606.5 | 3700.7 | 3801.7 | 3909.7 | 4025.2 | 4157.6 | 4294.8 | |
System Stock by Type (thousands) | |||||||||||||||
Room | 751.0 | 776.0 | 845.0 | 796.0 | 790.0 | 827.0 | 985.3 | 965.3 | 934.8 | 905.4 | 876.8 | 849.2 | 893.3 | 939.7 | |
Central | 1938.0 | 2007.0 | 2060.0 | 2210.0 | 2397.0 | 2511.0 | 2614.7 | 2641.2 | 2765.8 | 2896.3 | 3032.9 | 3176.0 | 3264.3 | 3355.0 | |
Shares (%) | |||||||||||||||
Room | 27.9 | 27.9 | 29.1 | 26.5 | 24.8 | 24.8 | 27.4 | 26.8 | 25.3 | 23.8 | 22.4 | 21.1 | 21.5 | 21.9 | |
Central | 72.1 | 72.1 | 70.9 | 73.5 | 75.2 | 75.2 | 72.6 | 73.2 | 74.7 | 76.2 | 77.6 | 78.9 | 78.5 | 78.1 | |
New Unit Efficiencies | |||||||||||||||
Room (EER)1 | 9.4 | 9.4 | 9.4 | 9.4 | 9.4 | 9.4 | 10.9 | 10.9 | 10.9 | 10.9 | 11.0 | 11.0 | 11.1 | 11.1 | |
Central (SEER)2 | 10.3 | 10.3 | 10.3 | 10.3 | 10.3 | 10.3 | 13.0 | 13.0 | 13.0 | 13.0 | 13.1 | 13.1 | 13.2 | 13.3 | |
Stock Efficiencies | |||||||||||||||
Room (EER)1 | 8.3 | 8.4 | 8.6 | 8.8 | 8.9 | 9.1 | 9.5 | 9.8 | 10.0 | 10.1 | 10.3 | 10.4 | 10.5 | 10.6 | |
Central (SEER)2 | 9.6 | 9.7 | 9.7 | 9.8 | 9.9 | 10.0 | 10.3 | 10.5 | 10.7 | 10.9 | 11.1 | 11.2 | 11.4 | 11.6 | |
Unit Capacity Ratio (Btu/hour) | |||||||||||||||
Room | 9,898 | 9,829 | 9,797 | 9,717 | 9,531 | 9,345 | 9,181 | 9,015 | 9,044 | 9,074 | 9,105 | 9,122 | 9,125 | 9,127 | |
Central | 33,466 | 33,624 | 33,768 | 33,919 | 33,389 | 32,873 | 32,372 | 31,873 | 31,879 | 31,885 | 31,891 | 33,257 | 33,265 | 33,274 |
Footnotes:
1) Energy Efficiency Ratio.2) Seasonal Energy Efficiency Ratio.