Making Energy Savings Easier: Usability Metrics for Thermostats

Making Energy Savings Easier: Usability Metrics for Thermostats

TitleMaking Energy Savings Easier: Usability Metrics for Thermostats
Publication TypeJournal Article
Year of Publication2011
AuthorsDaniel Perry, Cecilia Aragon, Alan K Meier, Therese Peffer, Marco Pritoni
JournalJournal of Usability Studies
Volume6
Issue4
Pagination226-244
Date Published08/2011
Abstract

U.S. residential thermostats control approximately 9% of the nation’s energy use. Many building codes now require programmable thermostats (PTs) because of their assumed energy savings. However, several recent field studies have shown no significant savings or even higher energy use in households using PTs compared to those using non-PTs. These studies point to usability problems that lead to incorrect use and wasted energy. However, the lack of clear, consistent metrics has hampered the acceptance of usability concerns by thermostat manufacturers. Thus there is a need for metrics specific to PTs that manufacturers can use to evaluate their products. In this paper, we report on the results of a usability study conducted on five commercially available PTs and the development of four new metrics suitable for use in evaluating thermostat usability. Our study confirmed usability deficits in the current generation of PTs and showed the metrics are correlated with each other as well as agreeing with the qualitative results of the study.

URLhttps://escholarship.org/uc/item/9gz9x7br