Describes the safety, construction and performance requirements for multifunctional controls (MFC) intended for use with gas burners, gas appliances and similar use, hereafter referred to as "multifunctional controls". Appropriate for multifunctional controls with declared maximum inlet pressures up to and including 50 kPa (500 mbar) of nominal connection sizes up to and including DN 150 for use with one or more fuel gases in accordance with EN 437.