2000 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | ||
---|---|---|---|---|---|---|---|---|---|---|
Total Cooling System Stock (thousands) | 39.0 | 150.9 | 157.0 | 167.6 | 179.0 | 191.2 | 204.2 | 218.1 | 233.0 | |
System Stock by Type (thousands) | ||||||||||
Room | 27.0 | 114.7 | 117.9 | 126.3 | 135.4 | 145.0 | 155.4 | 166.4 | 178.3 | |
Central | 12.0 | 36.1 | 39.1 | 41.3 | 43.7 | 46.2 | 48.9 | 51.7 | 54.6 | |
Shares (%) | ||||||||||
Room | 69.2 | 76.1 | 75.1 | 75.4 | 75.6 | 75.8 | 76.1 | 76.3 | 76.5 | |
Central | 30.8 | 23.9 | 24.9 | 24.6 | 24.4 | 24.2 | 23.9 | 23.7 | 23.5 | |
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.