对动物设施进行环境控制的目的包括维持动物的健康，防止出现对动物造成压力的情况，并消除外来影响。在对照实验中。本次专题讨论会上发表的早期论文已经讨论了与这些问题有关的一些生理考虑，因为它们与动物饲养系统设计有关。进一步的讨论强调了空气扩散和控制动物直接（微观）环境的重要性，而不是控制室内（宏观）环境。本演示的目的是提供有关系统设计和能耗模式的观察结果，包括一些推测，这些观察结果反映了其他论文中提出的观点。消除笼子及其封闭空间中动物产生的产品是设计师面临的主要挑战。 这些产品可能是气体或颗粒物:二氧化碳、水蒸气、细菌、氨和其他引起气味的物质。设计的一般理念是通过提供足够（或充足）的外部空气来冲洗房间中的这些材料。一些系统将采用过滤和消毒步骤，并对室内排气进行一定程度的再循环。然而，大多数使用100%室外空气，设计建议为每小时12到20次室内换气，最常见的是15到18次。引文:研讨会，ASHRAE交易，第81卷，第2部分，马萨诸塞州波士顿

Environmental control for animal facilities is provided for purposes which include maintaining the health of the animals, preventing occurrence of conditions stressful to the animals and eliminating extraneous influences. In controlled experiments. Earlier papers presented In this symposium have treated some of the physiological considerations related to these concerns as they relate to animal housing system design. Further discussion has emphasized air diffusion and the Importance of control of the animal 1s immediate (micro) environment over control of the room (macro) environment. The purpose of this presentation is to offer observations, including some speculation, concerning system design and energy consumption patterns which reflect the points developed In the other papers.The elimination of animal generated products from the cage and its enclosing room is the primary challenge to designers. These products may be gases or particulate matter: carbon dioxide, water vapor, bacteria, ammonia and other odor-causing materials. The general philosophy In design has been to flush the room of these materials by provision of adequate (or abundant) quantities of outside air. A few systems will employ filtration and sterilization steps with some recirculation of room exhaust air. However, the majority use 100% outside air with design recommendations ranging from 12 to 20 room air changes per hour, the 15 to 18 bracket being most common.