CAN/CSA P.3-98

1. Scope

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.