DAMPP-CHASER Dehumidifier & Humidity Control System 1) Dehumidifier Model 48-25A Length (shortest in photo): Approximately 123cm - 143cm (actual measurement) 2) Model H-D HUMIDISTAT Humidity Control System ◆ This was installed in a piano at my home, which I disposed of 4 years ago. It was installed by a piano tuner because the piano was used in a north-facing room. It was working without any problems. ◆ I have confirmed that it is operating normally for this listing. ◆ Can be used for both grand pianos and upright pianos.