Field evaluation of a new device to measure air handler flow

Paul W. Francisco, Larry Palmiter

Research output: Contribution to journalConference articlepeer-review


The airflow rate in heating and cooling equipment has major implications for the performance of the system. Improper flow across air conditioner and heat pump coils degrades the capacity of the coil, low flow across the heat exchanger in furnaces can cause the system to cycle on the high-temperature limit switch, and the flow rate has major implications for the efficiency of the duct system. The primary method for measuring the airflow through an air handler uses the change in temperature between the return and supply side of the air handler. However, this method is known to have major drawbacks. Recently, a new device has been developed that provides an easy way to measure the flow rate through residential air handlers. This paper presents the results of a field study to evaluate the performance of this device compared to the temperature change method. Potential commercial applications of the device are also discussed.

Original languageEnglish (US)
Pages (from-to)403-412
Number of pages10
JournalASHRAE Transactions
Volume109 PART 2
StatePublished - 2003
Externally publishedYes
Event2003 Annual Meeting of the American Society of Heating, Refrigerating and Air-Conditioning Engineers - Kansas, United States
Duration: Jun 28 2003Jul 2 2003

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering


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