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During extreme heat, the sequence in which poultry cooling equipment operates can affect both cooling performance and energy use. A staged control strategy is generally more effective than turning every device on at the same time.

Stage 1: Increase ventilation.
When indoor temperature begins to rise, tunnel or longitudinal ventilation should be increased first. Exhaust fans remove hot air and improve air movement around the birds. Fan capacity should be adjusted according to house temperature, stocking density, and required airflow.
Stage 2: Evaluate evaporative cooling conditions.
When ventilation alone cannot maintain the target indoor environment, evaporative cooling pads can be activated. Their effectiveness depends strongly on outdoor relative humidity and airflow. In humid weather, excessive water use may provide limited additional cooling, so humidity and temperature should be monitored together.
Stage 3: Apply multi-stage cooling.
During extreme heat, additional tunnel fans and cooling pads can operate through staged control. Temperature sensors and environmental controllers can automatically adjust fan speed, cooling stages, and operating intervals according to changing conditions.
The key principle is simple: establish sufficient airflow before relying on evaporative cooling. The exact temperature and humidity thresholds should be determined according to local climate, house design, bird age, ventilation capacity, and equipment specifications.

Modern poultry houses increasingly use automated climate-control systems to coordinate ventilation and cooling equipment. A temperature-based multi-stage control strategy can activate different equipment according to changing house conditions, helping maintain a more stable environment while avoiding unnecessary equipment operation.

Water quality is an important factor affecting the performance and maintenance of evaporative cooling pads in poultry houses. High mineral content, unsuitable pH conditions, and accumulated scale can interfere with water distribution and evaporation efficiency. This article examines practical maintenance strategies, including water testing, controlled bleed-off, periodic flushing, and routine inspection. Effective water management can…
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