2000 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | ||
---|---|---|---|---|---|---|---|---|---|---|
Total Cooling System Stock (thousands) | 172.0 | 771.3 | 849.7 | 813.5 | 779.2 | 746.8 | 716.0 | 686.9 | 659.4 | |
System Stock by Type (thousands) | ||||||||||
Room | 88.5 | 341.8 | 373.0 | 366.2 | 359.6 | 353.1 | 346.7 | 340.4 | 334.2 | |
Central | 83.5 | 429.5 | 476.8 | 447.3 | 419.6 | 393.7 | 369.4 | 346.5 | 325.1 | |
Shares (%) | ||||||||||
Room | 51.5 | 44.3 | 43.9 | 45.0 | 46.1 | 47.3 | 48.4 | 49.6 | 50.7 | |
Central | 48.5 | 55.7 | 56.1 | 55.0 | 53.9 | 52.7 | 51.6 | 50.4 | 49.3 | |
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.