Steven J. Hoff Iowa State University

Publish Date: January 1, 2023

Proper ventilation performance, especially during cold-weather periods, is affected by many factors including the performance of the planned primary inlet system and the hidden, unplanned leakage inlets from cracks and construction gaps (i.e., infiltration). This article will describe research conducted at Iowa State University to determine the extent and influence of infiltration on ventilation performance and some on-farm practices to help reduce the unwanted consequences from excessive infiltration.

Publish Date: June 6, 2006

Developing Standardization Procedures and Conducting Product Testing for Veterinary-Use Hypodermic Devices

Publish Date: June 3, 2006

Economies of scale and the greater need for efficiency have resulted in the vast majority of pigs being raised indoors. These artificial environments have a great impact on production performance and the health status of both the pig and the worker. With the pork industry becoming more integrated, uniform-style barns are built in multiples, and an error in design can be multiplied many times over. This situation highlights the continued need for adhering to basic design principles in ventilation and environmental control.