Comparison of VAV and CAV Systems: Which to Choose in 2025?

VAV and CAVare two different air distribution systems used to maintain comfortable temperature and air quality indoors. Both solutions are applied in commercial and industrial facilities, but they differ in terms of operating principle, efficiency, and cost. In this article, we will examine the differences between them and determine which system will be more suitable in 2025.

CAV (Constant Air Volume) — is a system that operates with a constant air flow. Air is supplied to the indoor space at a constant rate, and temperature changes are achieved by heating or cooling the air. This system is simple to use and is generally preferred in small spaces with similar heat loads.

VAV (Variable Air Volume) — is a variable air volume system. It regulates the amount of air supplied to the indoor space depending on the temperature in each zone. This is achieved through special dampers and sensors. The system automatically adapts to current conditions and user needs.

With rising energy prices and tightening building regulations, demand for VAV systems has increased. New energy efficiency requirements (especially for offices, hotels, commercial and medical buildings) are driving investors and businesses towards smart climate control solutions.

The choice depends on the following factors:

If a simple, low-requirement solution is needed — CAV is the optimal choice.