2000 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | ||
---|---|---|---|---|---|---|---|---|---|---|
Total Cooling System Stock (thousands) | 81.0 | 322.5 | 341.7 | 361.2 | 382.3 | 405.0 | 429.6 | 456.2 | 485.1 | |
System Stock by Type (thousands) | ||||||||||
Room | 55.9 | 246.7 | 258.7 | 274.4 | 291.2 | 309.2 | 328.3 | 348.7 | 370.5 | |
Central | 25.1 | 75.8 | 83.0 | 86.8 | 91.0 | 95.8 | 101.3 | 107.5 | 114.6 | |
Shares (%) | ||||||||||
Room | 69.0 | 76.5 | 75.7 | 76.0 | 76.2 | 76.3 | 76.4 | 76.4 | 76.4 | |
Central | 31.0 | 23.5 | 24.3 | 24.0 | 23.8 | 23.7 | 23.6 | 23.6 | 23.6 | |
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.