
Article 1 
Classes of performance in relation to air permeability for rooflights of plastics and glass and roof hatches, as set out in the Annex, are established.
Article 2 
This Regulation shall enter into force on the twentieth day following that of its publication in the Official Journal of the European Union.
This Regulation shall be binding in its entirety and directly applicable in all Member States.Done at Brussels, 14 March 2019.
For the Commission
The President
Jean-Claude JUNCKER
ANNEX

Class Lower limit value of Internal Pressure(4 Pa) Higher limit value of Internal Pressure(100 Pa)
Air permeability(in m3/(h.m))
A < 1,4 < 12
B ≥ 1,4 ≥ 12
C ≥ 6 ≥ 50

Note: The boundaries of the classes used in this Table may be derived from the following formula:Q=Q100×P1002∕3Where:Qis the leakage rate in m3 per hour, per linear m rooflight perimeter during a test under internal pressurePis the internal pressure during a test (in Pa)Q100is the leakage rate in m3 per hour, per linear m rooflight perimeter at an internal pressure of 100 Pa
