What does the EPO exclude from standard testing?

The EPO, or Energy Performance Outcome, specifically excludes domestic cold water meters from standard testing protocols primarily because these meters typically measure water consumption for residential purposes and their performance parameters may not require the same rigorous testing standards applied to other types of meters. Domestic cold water meters are generally designed and calibrated for a specific flow range pertinent to household usage, and as a result, their testing procedures are simpler and less stringent compared to industrial applications or specialized gas meter measurements.

This exclusion is based on the understanding that the variability in daily water use in domestic settings does not pose the same risks for measurement inaccuracies as seen in pressurized gas or industrial settings, where precision and performance are critical for safety and accuracy. Therefore, the standard testing intended for more complex and high-stakes measurement systems does not apply to domestic cold water meters.