NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.

Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.

U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

PUBLICATIONS

Programmers Guide to the Air-Handling Unit Performance Assessment Rule DLL

Published

Author(s)

Michael A. Galler

Abstract

The AHU Performance Assessment Rules (APAR) were developed in 2001 and have been implemented as part of a limited number of Fault Detection and Diagnostics (FDD) tools. While a list of the rules has been widely available, an implementation of them that is easy to access has not been. The APAR DLL was developed to increase ease of access to the analysis this rule set provides.
Citation
NIST Interagency/Internal Report (NISTIR) - 7960
Report Number
7960
NIST Pub Series
NIST Interagency/Internal Report (NISTIR)
Pub Type
NIST Pubs

Download Paper

https://doi.org/10.6028/NIST.IR.7960

Keywords

FDD, APAR, Fault Detection and Diagnostics, HVAC
Building control systems and Cyber-physical systems

Citation

Galler, M. (2013), Programmers Guide to the Air-Handling Unit Performance Assessment Rule DLL, NIST Interagency/Internal Report (NISTIR), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.IR.7960 (Accessed October 9, 2025)

Issues

If you have any questions about this publication or are having problems accessing it, please contact [email protected].

Created September 26, 2013, Updated November 10, 2018
Was this page helpful?