Control group energy use change, 2001–2 (n = 64) | Intervention group energy use change, 2001–2 (n = 72) | Net reduction in energy use comparing intervention and control groups | |
Energy use change (kWh) | +200 kWh | −118 kWh | 318 kWh |
Energy use change (%) | +8.4% | −4.9% | −13.2% |