2000 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | ||
---|---|---|---|---|---|---|---|---|---|---|
Total Cooling System Stock (thousands) | 147.0 | 319.5 | 332.6 | 330.6 | 330.2 | 331.2 | 333.5 | 337.0 | 341.6 | |
System Stock by Type (thousands) | ||||||||||
Room | 50.0 | 94.9 | 94.4 | 83.7 | 74.3 | 65.9 | 58.4 | 51.8 | 45.9 | |
Central | 97.0 | 224.6 | 238.1 | 246.9 | 255.9 | 265.3 | 275.1 | 285.2 | 295.6 | |
Shares (%) | ||||||||||
Room | 34.0 | 29.7 | 28.4 | 25.3 | 22.5 | 19.9 | 17.5 | 15.4 | 13.4 | |
Central | 66.0 | 70.3 | 71.6 | 74.7 | 77.5 | 80.1 | 82.5 | 84.6 | 86.6 | |
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.