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Cheers dude prob is fitted a replacement window mounted under warranty after motor failed in 1.5 yrs and now week old replacement fell out of Window yest apparently nearly on someone's head ! Just to see if I had/hadn't done something stupid only fitted a few window fans but previous 12" was secure etc. Think the tenant may have pulled external grille for cleaning and undone the 4 fixings and dropped the fan unit out by accident tbh
looks like a bit of vandalism there to be fair , or screws overtightened and expanded due to heat or direct sun ..
Looking at that grill after a week , it is little wonder the previous one only lasted a short time.
It's absolutely stinking their only a small cafe. The guy mentioned as I was leaving that it wasn't level inside in his opinion so maybe had a go at it. Also trying to get me to silicon it to the window due to vibrations he reckons caused it. Fitted fine was a bit tight as Louvres were a bit of a squeeze but I slackened it off incrementally to fit perfect tight but not too much tbh