Description Hydroceel® Piano Humidifier Unit. The Piano Humidifier is the proper answer to excessively hot or dry air, conditions which are unfortunately caused by almost all modern Central Heating Systems and the result is often that the piano goes out of tune, tuning pins loosen and joints can split. Easy to fit, simple to maintain, the Piano Humidifier offers a high degree of protection to both Grand and Upright pianos.
