Testing Method for Measuring Energy Consumption and Determining Efficiencies of Gas-Fired Water Heaters
View Access for this document is only available for viewers in Canada
1.1 This Standard describes the test procedures and calculations required to determine the recovery efficiency, standby loss, daily water heating energy consumption, average hourly hot-water storage energy consumption, recovery rate, first-hour rating, 24 h simulated test, and energy factor for gas-fired water heaters.
1.2 The requirements of this Standard apply to natural gas and propane gas storage-type water heaters having an input of 75 000 Btuh (21.98 kW) or less, and a storage capacity of 20-100 gal (76-380 L).
1.3 SI (metric) equivalents to customary American units (yard/pound) are provided for the purpose of information. SI equivalents may be approximate; the mandatory requirements of this Standard are those expressed in customary American units.