To be fair , lombers‘ yearly usage is totally plausible if he/she are a medium/ large practice with maybe say , 2 or 3 dentists , 2 dental assistants maybe, a hygienist and secretary. Waiting areas have to be lit up, computers, telephone systems, radiators burn energy. I’m sure lomber is not coming on here making up figures, Purple. Their bills used to be €500 every two months, now they are €1400 + . You are also ignoring the fact that commercial tarrifs are 2-3 times the price of residential presently , not to mention heftier PSO Levies and standing charges. Totally plausible and I think , with respect they and all businesses should be entitled to the TBESS.