Where should the controlling thermostat for a floor furnace ideally be installed if in a different room?

The ideal location for the controlling thermostat of a floor furnace is in a room that is permanently open. This is important because a thermostat needs to accurately sense the temperature of the space it is intended to control in order to maintain comfort and efficiency. When installed in a permanently open room, the thermostat can effectively monitor and respond to the heating needs of adjacent areas, ensuring that the entire space is kept at a consistent and comfortable temperature.

Placing the thermostat in a room that is always accessible helps prevent temperature fluctuations that can occur if it's isolated in a different room or space. Other options, such as any isolated area or a locked space, would not provide the thermostat with a proper understanding of the temperature in the living space, which could lead to ineffective heating and discomfort for occupants. Similarly, a room with no furnishings may not accurately reflect the heating needs of a room where people actually spend their time. Thus, positioning the thermostat in a permanently open room enhances its functionality and performance in managing the heating system effectively.