Humidity conditions for a baby grand in my home

[dracarnion]

Hello folks - I'm new here.  Long time player but first time owner of a piano.  I purchased a 1918 Steinway & Sons 5'10" Model O piano that I have in my home.  It's an older home from the 1930s so we don't have central air.  I have been running a dehumidifier around the clock to keep the conditions at around 40% humidity.  This is fine but it's quite noisy.  My top priority is to keep the piano in good condition so it is still in good shape when my daughter inherits it some day. 

Questions for piano owners who keep their piano at home -
-Do you have central air/humidity control?
-Do you use a dehumidifer?  If so, what brand/model?
-Dampp Chasers/Piano Life Savers ?  (I've been told not to go this route as it only monitors the humidity of part of the piano)

Looking for feedback from people who keep their piano at home and how they maintain it over a long period of time.  For reference, I am in the US northeast, so humidity can be rough. 

Thank you in advance!