Effect of improved environment on performance in schools and offices

improves performance in ... by (%) School Office
every 1℃ reduction in overheating 2.3% 3.6%
every 1l/s/p increase in ventillation rate (up to 15l/s/p) 1.0% 0.8%
every 100lux increase in ighting level 2.9% 0.8%
every 1dB decrease in excess noise 0.7% 0.3%
better daylight 9-18% 10%

* 1l/s/p - 1 litre per second per person

Additionally, every 100ppm decrease in CO2 concentration in schools has been associated with a 0.5% decrease in illness-related absence. Source: BPIE, "Quantifying the benefits of energy renovation investments in schools, offices and hospitals"