2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Total Cooling System Stock (thousands) | 39.0 | 35.0 | 39.0 | 53.0 | 59.0 | 68.0 | 73.9 | 83.0 | 93.6 | 105.6 | 119.1 | 134.3 | 139.6 | 145.1 | |
System Stock by Type (thousands) | |||||||||||||||
Room | 27.0 | 25.0 | 30.0 | 42.0 | 44.0 | 53.0 | 55.3 | 65.0 | 73.4 | 82.9 | 93.6 | 105.7 | 108.6 | 111.7 | |
Central | 12.0 | 10.0 | 9.0 | 11.0 | 15.0 | 15.0 | 18.6 | 17.9 | 20.1 | 22.6 | 25.4 | 28.6 | 30.9 | 33.4 | |
Shares (%) | |||||||||||||||
Room | 69.2 | 71.4 | 76.9 | 79.2 | 74.6 | 77.9 | 74.8 | 78.4 | 78.5 | 78.6 | 78.6 | 78.7 | 77.9 | 77.0 | |
Central | 30.8 | 28.6 | 23.1 | 20.8 | 25.4 | 22.1 | 25.2 | 21.6 | 21.5 | 21.4 | 21.4 | 21.3 | 22.1 | 23.0 | |
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.