Tunnel-Ventilated Broiler Houses: Broiler Performance and Operating Costs

Abstract

Interest continues to build in tunnel ventilation as a method of enhancing broiler performance and reducing mortality during warm weather. The perception that operating costs associated with this system may be high has caused concern. The purpose of this study was to collect and compare broiler performance data and operating costs of conventional and tunnel-ventilated broiler houses on a commercial broiler farm. Daily high temperatures during the study averaged 93°F (36°C). Typically, house temperatures were reduced 2 to 4°F (1 to 2°C) in the conventional house and 7 to 12°F (4 to 7°C) in the tunnel-ventilated house. Body weights at 55 days averaged 5.35 lbs. (2.43 kg) in the tunnel-ventilated house and 5.13 lbs. (2.33 kg) in the conventional house. Feed conversion was 2.03 and 2.05 in the tunnel-ventilated and conventional houses, respectively. Livability was essentially the same in both houses. Electricity costs over the entire growout in the tunnel-ventilated houses were nearly double those of the conventional house; however, these costs were only 20 to 30% higher on hot days. Fogging system water usage in the tunnel-ventilated house was more than twice that of the conventional house. Overall, the value of the enhanced performance of the broilers in the tunnel-ventilated house slightly offset the additional operating costs.