It sounds like you need to import a quality American A/C.

To be fair, it's not really the fault of the air conditioning units themselves, it's just that our landlords', er, concerns about disrupting the sleek exterior lines of their building with condensers mean that we are forced to put the condensers in the loft space and then vent the loft to the outside with fans. By the time the air conditioners give up, it's 45-50C in the loftspace, as we just can't vent the heat outside quickly enough.

Peter