THI Control: Smarter ventilation through heat stress detection

August 4, 2026

Why temperature alone isn’t enough

Maintaining the right poultry house environment is essential for bird welfare, health, and performance. While temperature has traditionally been the primary indicator used to control ventilation systems, it doesn’t tell the whole story.

Humidity plays a critical role in how birds experience heat. A house can appear to be within the correct temperature range, yet birds may still experience heat stress due to elevated moisture levels in the air. This is where THI Control comes in.

What is THI control?

THI (Temperature Humidity Index) Control is an advanced environmental management feature in Trio that continuously evaluates the combined impact of:

  • Temperature
  • Relative humidity
  • Bird age

By analyzing these factors together, THI Control provides a more accurate assessment of heat stress conditions than temperature measurements alone.

Automatically adapting to changing conditions

When humidity levels rise, birds become less efficient at dissipating body heat, increasing their risk of stress. THI Control automatically detects these conditions and responds by lowering the target temperature.

This adjustment increases ventilation rates, helping remove excess heat and moisture from the house while improving bird comfort.

Conversely, during cooler and drier periods, THI Control can reduce unnecessary ventilation and avoid excessive air exchange. This helps maintain stable environmental conditions while supporting energy-efficient operation.

Improving bird welfare through intelligent ventilation

Because THI Control responds to the actual thermal conditions experienced by birds, producers can achieve a more consistent growing environment throughout the flock cycle.

Key benefits include:

  • Earlier detection of heat stress conditions
  • Improved bird comfort and welfare
  • Optimized ventilation performance
  • More stable environmental control
  • Reduced risk of over- or under-ventilation
  • Adjustable safety limits for operational flexibility

Smarter environmental management

THI Control operates fully automatically within Trio, continuously monitoring environmental conditions and making adjustments when needed. By accounting for both temperature and humidity, producers gain a smarter approach to ventilation management that helps maintain optimal growing conditions, even during challenging weather conditions.

As environmental control becomes increasingly important for poultry production efficiency, tools like THI Control provide an additional layer of insight that helps ensure birds remain comfortable, healthy, and productive.