The principle parts of the outer frame or cabinet, the resonator, action and keyboard, are made of a large number of wood, felt, wool, leather and metal parts.  All these materials are very sensitive to changes in humidity. Even the smallest changes of humidity will affect the tone and touch.  Therefore, the relative humidity level in your piano room should be maintained at 40%RH to 60%RH.

If the environmental humidity outside is too wet or it’s overcast and rainy weather, please close the windows, the fallboard and the top after playing piano. Desiccant (a drying agent) is recommended inside your piano and should be changed regularly. It will help protect some parts being from being affected with dampness which causes distortion or oxidation. If extreme conditions require it, Pearl River also recommends the use of a device known as Dampp Chaser. This product can prolong the life of your piano and keep your service costs reasonable.

If the relative humidity becomes too low, put a basin of water in the room where the piano is located. This helps keep the humidity at a constant level as the water evaporates. As a result, the piano parts and finish will be less susceptible to damage. A Dampp Chaser will also produce the same results.