Air Systems Cleaning Specialist (ASCS) Practice Exam

The primary function of a humidifier in HVAC systems is to increase humidity. In many indoor environments, especially during heating seasons, the air can become excessively dry. This low humidity can lead to discomfort, such as dry skin, irritated respiratory tracts, and static electricity build-up. A humidifier works by adding moisture to the air, which helps maintain a comfortable humidity level and can also improve overall indoor air quality.

Maintaining an appropriate humidity level is essential for comfort and can even contribute to the efficiency of heating and cooling systems, as well as safeguard wooden furniture and floors from cracking due to dryness. While other HVAC components may handle cooling, temperature regulation, and filtration, the specific role of a humidifier is focused on moisture enhancement.