Humidity For a New Kawai GL-30?

[ainmpiano]

I have been told adamantly by a piano tech that my new Kawai GL-30 should be kept between 45 and 55% humidity.

I have also been told by a Kawai tech that my new Kawai GL-30 should be kept between 45 and 65% humidity (just find a spot and keep it there).

Which is right?

The temp in this home ranges from 62-67 F during the winter, about 62-70 in summer.
Thanks.
Mac

[iansinclair]

It is far more important to keep the humidity reasonably constant than it is to target a set value.  Pretty much any humidity which is reasonably comfortable will do.  I'll go with the Kawai tech!

What you don't want to do is to change the humidity -- or temperature -- quickly.  Forced hot air heat is a really bad actor on this, particularly if you lower the temperature from time to time to "save energy".  I won't go so far as to say that "setbacks" and forced air heat are lethal to a piano -- but they aren't far from it.

[hfmadopter]

I have been told adamantly by a piano tech that my new Kawai GL-30 should be kept between 45 and 55% humidity.

I have also been told by a Kawai tech that my new Kawai GL-30 should be kept between 45 and 65% humidity (just find a spot and keep it there).

Which is right?

The temp in this home ranges from 62-67 F during the winter, about 62-70 in summer.
Thanks.
Mac

I keep my living room where the piano is around 40-45% and it holds it's tune pretty well like that. As mentioned it's the big swings in humidity they don't like. But here in NE in mid winter and with the heat on etc, the house could drop to about 7% if I didn't have a humidifier, and 85-90% in mid summer humid weather if I didn't air condition. So my aim is to just narrow that huge swing.

[ainmpiano]

Thanks for the comments.

Yes, I aim for 55-ish, with my dehumidifier now.

I was worried that somehow 45-55 was a magical range that I dare not go above.

Mac

[hfmadopter]

Thanks for the comments.

Yes, I aim for 55-ish, with my dehumidifier now.

I was worried that somehow 45-55 was a magical range that I dare not go above.

Mac

My house is at 54% right now, just because the humidifier isn't struggling to get it there. I have the humidifier set at 55% right now. Part of my problem is we use a pellet stove but at least it's on the opposite end of the room from the piano and evaporative style humidifier.