Residential Sector
British Columbia
Table 27: Cooling System Stock by Type, New Unit Efficiencies, Stock Efficiencies and Unit Capacity Ratio
  2000   2007 2008 2009 2010 2011 2012
Total Cooling System Stock (thousands) 171.0   316.9 364.0 376.8 399.1 429.1 446.7

System Stock by Type (thousands)
Room 88.0   163.7 173.0 201.1 212.4 231.2 250.9
Central 83.0   153.2 191.0 175.7 186.7 197.9 195.8

Shares (%)
Room 51.5   51.6 47.5 53.4 53.2 53.9 56.2
Central 48.5   48.4 52.5 46.6 46.8 46.1 43.8

New Unit Efficiencies
Room (EER)1 9.4   10.9 10.9 10.9 12.0 12.0 12.0
Central (SEER)2 10.3   13.0 13.0 13.0 13.0 13.0 13.0

Stock Efficiencies
Room (EER)1 8.3   9.8 10.0 10.1 10.4 10.6 10.8
Central (SEER)2 9.6   10.5 10.7 10.9 11.1 11.2 11.4

Unit Capacity Ratio (Btu/hour)
Room 9,898   9,015 9,048 9,064 9,086 9,080 9,090
Central 33,466   31,873 31,872 31,884 31,886 33,236 33,225

Footnotes:

1) Energy Efficiency Ratio.
2) Seasonal Energy Efficiency Ratio.