Hi Martha, thankyou for your link, works perfectly :D. our ventilation units were the ones on roof of the building, not the apartment so we couldnt shut them off, like a hair dryer going off all night. I thought it was mrs D at first regurgatating a cockroach swalllowed in pool
![:roll:](/storage/forum/smilies/icon_rolleyes.gif)
One night we heard an almighty crash and thought one of the kids had fell out of bed, mrs D ran into lounge to check which one had the fractured skull, dad didn't..... takes me a while to come round
![:?](/storage/forum/smilies/icon_confused.gif)
and the mystery was solved when we learned there had been an earthquake during the night. the infamous ventilation unit had collapsed on its side. can't wait for this september.............