Nate Core Practice Test 2025 – 400 Free Practice Questions to Pass the Exam

Higher humidity can decrease system efficiency and lead to discomfort due to the relationship between humidity levels and the HVAC system's ability to control temperature and moisture in the air. When humidity levels are elevated, the air is saturated with moisture, making it more challenging for HVAC systems to effectively remove heat from the air. This can result in less efficient cooling performance because the system must work harder to achieve the desired temperature, thus consuming more energy.

Additionally, high humidity can cause discomfort for occupants, as it can feel warmer than the actual temperature due to the body's reduced ability to cool itself through the evaporation of sweat. This leads to a situation where not only is the efficiency of the HVAC system compromised, but the comfort levels in the environment are also negatively affected. Understanding the impact of humidity on HVAC performance is crucial for maintaining energy efficiency and ensuring user comfort.