<HTML>In a message dated 1/2/01 8:03:14 AM Central Standard Time, Richard.Brekne@grieg.uib.no (Richard Brekne)1 writes: <BLOCKQUOTE TYPE=CITE style="BORDER-LEFT: #0000ff 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px">Three rooms had had the panel ovens turned off so the rooms were quite cold. In these rooms the DC units had used nearly no water in the ten days since I had been there last. Most of the other units used about 2 liters of water in that ten day stretch. 2 pianos used nearly 4 liters of water. These last two were in rooms where the heaters had been turned waaaayyy up and the temperature was like around 35 degrees C.</BLOCKQUOTE> This obviously shows that the units were working.  In the unheated room, the humidity went up as the temperature went down so the dehumidifiers were on most of the time.  In the over heated rooms, the humidifiers were working nearly all the time to try to keep up with the overly dried out air. I'm glad to see that you are able to get these going in an institutional setting.  In most public places, it doesn't take long for these systems to be forgotten about, neglected and ignored but the complaints about pianos not staying in tune persist.  I'll bet you have to really check on things often to make sure they are plugged in and watered.  The users and other maintenance people don't often care or keep it in mind enough to give the systems a fighting chance. Bill Bremmer RPT Madison, Wisconsin</HTML>