The Piano Life Saver System...

• Stabilizes pitch and permits tunings to hold much better and longer (the tuning will not go sharp or flat when the weather or room humidity changes)
• Minimizes the expansion and contraction of action parts which provides optimum touch and predictable keyboard control
• Prevents rust on the strings and metal parts
• Minimizes felt deterioration, reducing the harsh tones that come from flattened hammer felt in low humidity or the muffled tones from swollen hammer felt in high humidity
• Minimizes glue failure throughout the piano
• Protects your piano's investment value year after year

The Piano Life Saver System is made up of basic components which work together to control the humidity levels within your piano, maintaining the recommended relative humidity, no matter what the external conditions are. 

Through a cycling action, the Humidistat is calibrated to create a separate environment within the piano, producing a narrow range of average humidity.  When the Humidistat, located less than an inch from the soundboard, senses that the wood is dry, it turns the Humidifier on.  Then, when the Humidifier has provided enough moisture to the soundboard, the Humidistat turns off the Humidifier and turns on the Dehumidifier.  The Dehumidifier carries away moisture from the soundboard on air currents until the Humidistat senses that the soundboard is dry.  The System again switches to the humidifying function.   The cycle continues day after day, year after year, protecting your piano from external conditions.