Q usable = the estimated total usable heat delivered by heat pumps fulfilling the criteria referred to in Article 7(4), implemented as follows: Only heat pumps for which SPF > 1,15 * 1/η shall be taken into account,
Qúsáideach = an teas úsáideach iomlán measta arna sholáthar ag teaschaidéil a chomhlíonann na critéir dá dtagraítear in Airteagal 7(4), arna chur chun feidhme mar seo a leanas: Ní chuirfear ach teaschaidéil lena bhfuil SPF > 1,15* 1/η san áireamh,