HVAC air handler systems can be categorized into which two types?

The categorization of HVAC air handler systems into constant volume and variable volume is foundational to understanding how these systems operate and distribute air throughout a building.

Constant volume systems maintain a consistent airflow regardless of the temperature demands of the space. This means that they deliver the same volume of air at all times, which simplifies the control of air distribution but can lead to inefficiencies when the heating or cooling loads vary within the space.

On the other hand, variable volume systems adjust the airflow based on the heating and cooling requirements of a space. This allows for better energy efficiency, as the system can adapt to changing demands by increasing or decreasing airflow, which also contributes to maintaining comfort levels more effectively.

This distinction is crucial in HVAC design and operation, as it influences aspects like energy consumption, system complexity, and overall effectiveness in meeting occupant needs. By understanding these two categories, one can make informed decisions about HVAC system selection and optimization.