Cold-Shower Mystery Solved

Multi-Channel Data Loggers Improve Forensic Analysis of Complex Domestic Hot-Water Complaints

Greg Lowitz, Buildera

PDF (6 MB), 8 Pages, 10 Figures

Abstract

An energy-conscious homeowner complained of insufficient hot water during morning and evening showers, particularly in warmer months. Yet, at other times of the day, and during colder winter months, hot water was plentiful—approaching scalding temperatures in excess of 120ºF. The occupant set the thermostat to the manufacturer’s recommended energy-saving setting, which remained unchanged since installation. Flushing the hot-water tank and accumulated sediment failed to significantly raise hot-water temperature during first use. Prior to forensic analysis, the homeowner suspected the water heater was due for replacement—an estimated $1,200 repair—including parts and labor. To solve this mystery, Buildera conducted a non-invasive, scientific analysis of the hot-water system and thermostat hysteresis using a battery-operated four-channel temperature logger. To assist contractors, homeowners, inspectors, and property-maintenance managers on challenging hot-water issues, this application note details the troubleshooting methodology, practical tips, and solutions.

IEEE and ASHRAE Reference Formats

Buildera recommends the following reference formats when citing this work in printed or online publications.

IEEE Reference Format

G. E. Lowitz, "Buildera Application Note AN-14001 | Cold-Shower Mystery Solved: Multi-Channel Data Loggers Improve Forensic Analysis of Complex Hot-Water Complaints," Buildera, Redwood City, CA, Publication Number BD-AN-90300-14001EN Ver 1.0, pp. 1-8, 8 Dec 2014. [PDF]. Available: http://www.buildera.com/cold-shower-mystery-solved-application-note-an-14001/

ASHRAE Reference Format

Lowitz, G.E. 2014. Buildera Application Note AN-14001 | Cold-Shower Mystery Solved: Multi-Channel Data Loggers Improve Forensic Analysis of Complex Hot-Water Complaints. Publication Number BD-AN-90300-14001EN Ver 1.0. Redwood City, CA: Buildera. http://www.buildera.com/cold-shower-mystery-solved-application-note-an-14001/