Regulations and standards

The table below gives an overview of the Dutch regulations and standards concerning the different climate aspects. A distinction is made between regulations and standards concerning the outdoor environment and those concerning the indoor environment.

	outdoor	indoor
	x	NEN 2057: At least 2 possible sunlight hours between March 1st and September 1st at window centre (windowsill height)
	x	Buildings Decree: Equivalent daylight area is equal to a certain percentage of floor area and at least 0,5 m2 (for: dwellings, offices, schools and health care buildings)
	NEN 8100: Threshold wind speed for comfort is 5 m/s, Threshold wind speed for danger is 15 m/s + limits for the probability of exceeding this threshold wind speed within a certain period of time	x
	Directive 2008/50/EC: PM2.5 25 µg/m3 (1 year) PM10 50 µg/m3 (24 hours), 40 µg/m3 (1 year) SO2 350 µg/m3 (1 hour), 125 µg/m3 (24 hours) NO2 200 µg/m3 (1 hour), 40 µg/m3 (1 year) O3 120 µg/m3 (maximum daily 8 hour mean) + permitted events of exceeding these values each year	Buildings Decree: Air exchange rate of 0.9 l/s per m2 floor space for habitable spaces of dwellings, 1.3 l/s per m2 floor space for habitable areas of offices.
	x	Noise Abatement Act: No more than 48 dB(A) at façade due to traffic noise (with exceptions) No more than 50 dB(A) at façade due to industrial noise (with exceptions) No more than 55 dB(A) at façade due to rail traffic noise (with exceptions) Only valid for dwellings
	x	x