What Causes Condensation in Radiant Cooling Systems?

Condensation is one of the most critical risks in radiant cooling systems, especially in residential projects using Underfloor Cooling (UFC).

Understanding why condensation occurs—and how it can be prevented—is essential for designing stable and reliable radiant HVAC systems.

What Is Dew Point in HVAC Systems?

The dew point is the temperature at which air becomes fully saturated with moisture.

When a surface temperature drops below the dew point, water vapor condenses into liquid water on that surface.

Why Condensation Occurs in Radiant Cooling Systems

Condensation occurs when the surface temperature of a radiant floor or panel becomes lower than the indoor air dew point.

High indoor humidity, lack of real-time dew point monitoring, and insufficient control logic are common contributing factors.

Why Underfloor Cooling Is More Sensitive to Condensation

Underfloor cooling systems are particularly sensitive because of large surface areas and limited airflow for moisture removal.

The Role of Dew Point Control in Radiant Cooling

Dew point control prevents condensation by continuously monitoring temperature and humidity and limiting cooling output before condensation occurs.

Summary

Condensation in radiant cooling systems is fundamentally a control problem.

Stable UFH and UFC systems require continuous dew point monitoring and intelligent control logic.

Understand How to Prevent Condensation in Radiant Cooling Systems

By understanding the root causes of condensation and the importance of dew point control, you can design a more stable and efficient system for your projects. Now is the perfect time to take preventive measures.