2000 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | ||
---|---|---|---|---|---|---|---|---|---|---|
Total Cooling System Stock (thousands) | 597.0 | 2021.3 | 2074.9 | 2104.5 | 2138.5 | 2177.1 | 2220.5 | 2269.2 | 2323.5 | |
System Stock by Type (thousands) | ||||||||||
Room | 362.0 | 1368.4 | 1383.4 | 1360.9 | 1338.8 | 1317.1 | 1295.7 | 1274.7 | 1254.0 | |
Central | 235.0 | 652.9 | 691.5 | 743.6 | 799.7 | 860.0 | 924.8 | 994.5 | 1069.5 | |
Shares (%) | ||||||||||
Room | 60.6 | 67.7 | 66.7 | 64.7 | 62.6 | 60.5 | 58.4 | 56.2 | 54.0 | |
Central | 39.4 | 32.3 | 33.3 | 35.3 | 37.4 | 39.5 | 41.6 | 43.8 | 46.0 | |
New Unit Efficiencies | ||||||||||
Room (EER)1 | 9.4 | 11.2 | 11.2 | 11.3 | 11.3 | 11.4 | 11.5 | 11.5 | 11.6 | |
Central (SEER)2 | 10.3 | 13.3 | 13.4 | 13.5 | 13.5 | 13.6 | 13.7 | 13.7 | 13.8 | |
Stock Efficiencies | ||||||||||
Room (EER)1 | 8.3 | 10.7 | 10.8 | 10.9 | 10.9 | 11.0 | 11.1 | 11.2 | 11.2 | |
Central (SEER)2 | 9.6 | 11.8 | 12.0 | 12.2 | 12.4 | 12.7 | 12.9 | 13.1 | 13.3 | |
Unit Capacity Ratio (Btu/hour) | ||||||||||
Room | 9,898 | 9,129 | 9,131 | 9,218 | 9,285 | 9,353 | 9,472 | 9,489 | 9,507 | |
Central | 33,466 | 33,282 | 33,291 | 33,140 | 32,989 | 32,827 | 32,634 | 32,637 | 32,640 |
Footnotes:
1) Energy Efficiency Ratio.2) Seasonal Energy Efficiency Ratio.