Which heating system is most likely to cause problems due to the "distribution effect"?

The heating system that is most likely to cause problems due to the "distribution effect" is the forced air furnace with a return air opening in the furnace room.

The "distribution effect" refers to the way heated air is distributed throughout a space. In a forced air heating system, warm air is pushed through the ducts into the living areas, and return air is drawn back to the furnace to be reheated. If there is a return air opening in the furnace room, it can lead to several issues.

One significant problem is that it can create a situation where warm air is drawn back too quickly into the furnace, leading to insufficient heating in the occupied spaces. The furnace may end up cycling on and off too frequently because the return air helps to maintain pressure levels, but if it does not circulate adequately, some areas can remain cold.

Additionally, having the return air directly in the furnace room may create a scenario where the system does not effectively mix and distribute heat throughout the building, potentially resulting in cold spots and uneven temperatures. Properly designed return air systems are essential for effective heating, and this configuration may hinder that effectiveness.

In contrast, other options either provide a more balanced heating experience or eliminate the potential for these issues by having