What Is Cooling Tower Filler

A cooling tower filler (also called cooling tower fill) is one of the most important components inside a cooling tower.

Cooling tower filler is the heat exchange medium— the material installed inside the cooling tower to increase the surface area and improve contact between air and water, so heat can be transferred more efficiently.

Functions of cooling tower filler:

1. cooling tower filler **Increase surface area**

  The filler spreads the hot circulating water into thin films or small droplets, exposing more water surface to air.

2. cooling tower filler **Enhance heat transfer**

  Better air–water contact means more efficient evaporation, which lowers the water temperature.

3. cooling tower filler **Improve cooling efficiency**

  High-quality filler reduces water temperature effectively, improving the cooling tower’s overall performance.

Types of cooling tower filler:

**Film fill**

 Water spreads into a thin film over large surface areas (PVC sheets with wave or honeycomb structures).

 → Common in many modern cooling towers, high cooling efficiency.

**Splash fill**

 Water is broken into droplets by splash bars or grids.

 → Better for dirty water or high solid content, since it resists clogging.

Cooling tower Materials:

* **PVC (Polyvinyl chloride)** – lightweight, cost-effective, widely used.

* **PP (Polypropylene)** – more durable, higher temperature resistance.

Cooling tower filler In short:

Cooling tower filler = **the "core" packing material** inside the cooling tower that boosts **evaporation and heat exchange** by maximizing air–water contact.