What does a low Equilibrium Factor indicate in a radon measurement context?

A low Equilibrium Factor in the context of radon measurement indicates a situation where there is a significant difference between the concentration of radon gas and the concentration of its attached decay products. When this factor is low, it often reflects the use of equipment such as fans or air cleaners that can increase the air mixing in a space and reduce the concentration of radon decay products relative to radon gas.

The presence of a fan or air cleaner helps in dispersing the radon gas and its decay products throughout the environment or can actively reduce the levels of attached particles in the air, leading to an observation of a lower Equilibrium Factor. By increasing the air flow and enhancing ventilation, these devices can effectively dilute radon levels and promote healthier indoor air quality.

In contrast, other factors like high humidity, radon level increases, or excessive outdoor ventilation do not directly correlate with a low Equilibrium Factor. High humidity may actually encourage the adhesion of radon decay products to airborne particles, potentially increasing the Factor instead. An increase in radon levels would generally not lead to a low Equilibrium Factor either, as higher levels of radon typically correspond to an elevation in decay products. Finally, while outdoor ventilation can play a role in reducing indoor radon