The latest in grand piano humidity control, Piano Guard is an advanced system that humidifies, dehumidifies, and feeds all the data to an app for easy, remote monitoring. The system includes a humidifier, dehumidifiers, sensors, and a control panel. Easy to install, this system is a must for universities, institutions, or private owners who want the convenience of trackable data. The system can be installed on all grand pianos up to 220 cm (7' 2"). View the online installation manual here for more details. 
 
Note that the price is the technician's wholesale price. You may sell the system for whatever is reasonable, but the Minimum Advertised Price (MAP) is $875.