KEY MATERIALS FOR FILLS
| Material | Max Temp | Properties | Typical Use |
| PVC (Polyvinyl Chloride) | ~50-60°C (122-140°F) | Low cost, good corrosion resistance, flammable. | Standard for most film & splash fills in HVAC and general industry. |
| PP (Polypropylene) | ~70-80°C (158-176°F) | Higher temp tolerance, good chemical resistance. | Hot water processes, chemical plants. |
| Wood (Redwood, Fir) | Varies | Natural rot resistance, but degrades over time. | Older towers, specific industrial apps. |
| Ceramic / Clay | >100°C (212°F+) | Inert, fireproof, very heavy. | Special high-temperature industrial processes. |