The amount of aerothermal, geothermal or hydrothermal energy captured by heat pumps to be considered to be energy from renewable sources for the purposes of this Directive, ERES, shall be calculated in accordance with the following formula:
Déanfar méid an fhuinnimh aeraiteirmigh, geoiteirmeigh nó hidriteirmigh arna ghabháil ag teaschaidéil atá le meas mar fhuinnimh ó fhoinsí inathnuaite fuinnimh chun críocha na Treorach, seo ERES, a ríomh i gcomhréir leis an bhfoirmle seo a leanas: