Efficiency labelling has been in force since 1994, by the Decree-Law No. 41/94 of 11 February 1994. This Framework Decree-Law encourages producers to manufacture and consumers to purchase more energy-efficient appliances. Order Nos. 1139/94 of 22 December 1994, 116/96 of 13 April 1996, 279/97 of 28 April 1997 and 117/96 of 15 April 1996 applied to refrigerators, washing machines, dryers and washer-dryers, respectively. Manufacturers support the costs of the test procedures and labelling systems. The EU Directive on energy efficiency standards for refrigerators and freezers was adopted in 1994. A Minimum Efficiency for Heating Boilers has been in force since 1996 and sets minimum efficiency requirements for hot water boilers. In 2001, energy efficiency requirements for fluorescent lighting ballasts were adopted according to EU directive.