2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | ||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Total Cooling System Stock (thousands) | 249.0 | 255.0 | 280.0 | 285.0 | 296.0 | 309.0 | 316.9 | 340.8 | 348.9 | 357.4 | 366.3 | 375.7 | 378.9 | 382.9 | |
System Stock by Type (thousands) | |||||||||||||||
Room | 81.0 | 80.0 | 96.0 | 104.0 | 95.0 | 103.0 | 104.4 | 117.1 | 116.1 | 115.2 | 114.3 | 113.3 | 106.5 | 100.0 | |
Central | 168.0 | 175.0 | 184.0 | 181.0 | 201.0 | 206.0 | 212.4 | 223.7 | 232.8 | 242.2 | 252.1 | 262.3 | 272.4 | 282.9 | |
Shares (%) | |||||||||||||||
Room | 32.5 | 31.4 | 34.3 | 36.5 | 32.1 | 33.3 | 33.0 | 34.4 | 33.3 | 32.2 | 31.2 | 30.2 | 28.1 | 26.1 | |
Central | 67.5 | 68.6 | 65.7 | 63.5 | 67.9 | 66.7 | 67.0 | 65.6 | 66.7 | 67.8 | 68.8 | 69.8 | 71.9 | 73.9 | |
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.