grand piano humidity bar

Will a humidity bar effect the tuning of my Bluthner boudoir grand Piano?

I need to move this piano from its storage annexe (cold, so a humidity bar is always left on) into the theatre stage area, a distance of about 15-20 ft.

The piano was tuned last Thursday.
The concert I am giving starts at 7.30 pm Friday evening.
Ideally the best time to move this piano is tomorrow, Thursday afternoon, when several people will be available to gently do so.
Please can you advise on the humidity bar; the theatre is quite cold until heating goes on about an hour before performance.
I need to have the piano in situ on the Friday afternoon of my concert because of filming going on, and sound checks etc having to be made in advance.

1) Should the humidity bar be left switched on overnight after the piano has been moved the day before the concert?
2) If so, at what time ought the bar be switched off prior to my recital at 7.30pm the following day?

Thanks, your advice much appreciated.
Christine Rayner

I would suggest that the humidity bar is a piece of long term protection.. but consult your tuner.


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