Only heating and cooling systems where the output or energy removed from an area significantly exceeds the primary energy needed to drive them should be taken into account.
Níor cheart a chur san áireamh ach córais téimh agus fuaraithe ina mbíonn an t-aschur nó an fuinneamh a dhealaítear as an gceantar go mór os cionn leibhéal an fhuinnimh phríomha is gá chun é a thiomáint.