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

Thermal Performance Evaluation of a Small Duct High Velocity System Using NIST's Net-Zero Energy Residential Test Facility

Published

Author(s)

Khiem Nguyen, Hyojin Kim, Lisa Ng, William V. Payne

Abstract

This study aims to evaluate the performance of a Small Duct High Velocity (SDHV) heat pump by comparing it with the Conventionally-Ducted Heat Pump (CDHP) using one-year of detailed data from the two-story Net-Zero Energy Residential Test Facility (NZERTF) on the campus of the National Institute of Standards and Technology (NIST). The NZERTF is a single-family home but is also a laboratory with simulated occupancy and scheduled internal loads. During the analysis period, the SDHV and the conventionally-ducted systems were alternately operated every other week in order to allow a comparison between the two under similar weather conditions. The preliminary analysis indicated that the SDHV system might not always provide superior thermal comfort compared with the CDHP. Potential reasons are lower supply airflow rates from the SDHV during the heating season in this low-load house; and extremely tight throttling range of the CDHP. Additional analyses are needed to confirm the findings.
Proceedings Title
Indoor Air 2018
Conference Dates
July 22-27, 2018
Conference Location
Philadelphia, PA, US
Pub Type
Conferences

Download Paper

Local Download

Keywords

Measurement and Verification, Thermal comfort, IEQ, Low-energy building technology
Indoor air quality and Buildings and Construction

Citation

Nguyen, K. , Kim, H. , Ng, L. and Payne, W. (2018), Thermal Performance Evaluation of a Small Duct High Velocity System Using NIST’s Net-Zero Energy Residential Test Facility, Indoor Air 2018, Philadelphia, PA, US, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=925116 (Accessed October 10, 2025)

Issues

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

Created August 6, 2018, Updated October 12, 2021
Was this page helpful?