This morning, I woke up to my wife saying "It is a little chilly in the house, can you start a fire in the furnace." I went to look at the thermostat, and it was reading 70. When we lived in a townhouse we kept the thermostat at 68 when heating with natural gas and again at 68 here when heating with oil. Now, when heating with wood we keep the thermostat set at 74 and 70 seems cold. I am still amazed at how well this furnace is heating the house and have no doubt that it will be able to heat the house easily in the dead of winter.