Thanks Linuxboy, that's what we thought, the builder is saying because the architect called the room "hard cheese store" and we had white rinded cheese in there the cooling unit is not covered under warranty. going to be a interesting meeting tomorrow.
Thanks Francois, our situation is essentially low humidity, and if it was high humidity , the dodgy way the builder made the rooms , e.g. with the drain at the highest point, would mean we have even more problems
we are looking into creating a water bubble filter , but there was never a lot of science in the ones I used to make, at the moment we are thinking no more whites nor hards for sometime until we can get a solution,