Hydronic snowmelt system settings often need to be dialed in based on customer expectations and site conditions, but having a starting point for settings outside of the manufacturer defaults can be helpful. Below you will find the IOM to get you to the settings and explain what they do a little better, and below that, the typical settings for a residential or light commercial application in West Michigan. As mentioned before, the idle temp (if used), melt temp, WWSD, and CWCO may need to be dialed in during the first winter. Keep in mind that the higher the performance of the system, generally the higher the energy usage. But, at the end of the day, the end-user paid to have a functioning snowmelt system installed and it is up to you to make it function the way it was designed.