This suggests that running costs will certainly vary widely, depending also on where in your house your air disadvantage is installed. http://www.gross-gruppe.com/gross-in-aktion/main.php?g2_view=core.UserAdmin&g2_subView=core.UserLogin&g2_return=https%3A%2F%2Furlscan.io%2Fresult%2Feaf21af5-ed59-4e17-9038-d2f0a95e1f84%2F