The leader in humidity control for both grand and upright pianos is the Piano Life Saver System from DAMPP-CHASER.
This system is the best technology for protecting your piano from the damaging effects of environmental changes.
I'm sure you have seen and felt the effects of moisture on things such as sticking drawers, sticking doors and furniture
joints. These moisture effects are the same in a piano which result in sticking keys, sluggish action parts, rusting
strings and cracks in wood parts.
Keys become sticky and tight in times of high humidity and loose when the air is dry. In times of high humidity
you may find that the touch of your piano is stiff and sluggish and the keys seem non-responsive to touch. The pitch
of your piano will change with humidity as the wood either expands or contracts with moisture.
The pinblock, tuning pins and strings will be effected due to the moisture in the wood, and strings will rust during
high humidity causing string damage and difficult tuning.
The DAMPP-CHASER is a Humidistat system with a Humidifier/Dehumidifier to keep your piano at a controlled humidity level
it was designed to be used in. It has a 5 year guarantee and will be a big step in keeping your piano in tune from summer
to winter.
Please contact me for more info on how this system can improve your piano, and the cost of installation. I
will be happy to help you in any way I can.