Last week we installed a water furnace 7 series 4 ton geothermal system. We have four vertical loops each 200 feet. We replaced a propane fueled forced air furnace. The temperatures have been mild, 30° to 40°F. Since it was installed a week ago it has run continuously. It's cycles up and down through the various heat settings and fan settings, but never shuts off. If I look at the energy usage on the thermostat it shows that it is running 24 hours a day for the last week. I'm concerned that when the temperatures fall which they will easily do the system will not be able to keep up and I will be constantly running it on the auxiliary 15 kW electric heat strip. I emailed water furnace, and their response was basically told me to talk to the installer. I emailed the installer and they said that it is a variable speed fan motor heating system that is designed to run all the time. Does this sound the correct? From what information I could find online, the geothermal system is supposed to run more often, but not continuously 24 hours a day.