Fossil fuel systems cause people to experience cold air drafts (as the warmer air rises). Geothermal heat pump systems run for longer periods of time causing the air to be moved more frequently and consistently. This increased air flow mixes all the room air resulting in a more comfortable and consistent temperature. Geothermal heat pump customers who have systems installed correctly always comment on being more comfortable.
When a geothermal heat pump system is planned, the duct work registers are set up so the air will wash the exterior walls with the heat and not allow the cold air to get to the floor. This continuous washing of the walls with warm air, makes the room temperature consistent. With a geothermal heat pump system, you do not experience cold drafts near the floor and your feet!