Accuracy of Flow Hoods in Residential Applications.

Wray, C. ; Walker, I. ; Sherman, M.

Technical Information Center Oak Ridge Tennessee

关键词: Air flow;    Residential buildings;    Space HVAC systems;    Accuracy;    Availability;   

RP-ID  :  DE2004822615

学科分类：工程和技术（综合）

美国|英语

来源: National Technical Reports Library

【 摘 要 】

To assess whether houses can meet performance expectations, the new practice of residential commissioning will likely use flow hoods to measure supply and return grille airflows in HVAC systems. Depending on hood accuracy, these measurements can be used to determine if individual rooms receive adequate airflow for heating and cooling, to determine flow imbalances between different building spaces, to estimate total air handler flow and supply/return imbalances, and to assess duct air leakage. This paper discusses these flow hood applications and the accuracy requirements in each case. Laboratory tests of several residential flow hoods showed that these hoods can be inadequate to measure flows in residential systems.