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Heaters
This category covers the performance and testing to help with the functionality of heaters.
ASME PTC 4.3-2017 (R2022)
Air Heaters
This Code provides procedures for conducting performance tests of air heaters to determine: exit gas temperature; air to gas leakage; fluid pressure losses; and other fluid temperatures. It also provides procedures to determine the heat capacity ratio (X-ratio) and any or all of the performances results specified above that may be necessary for: checking actual performance against standard or design performance; comparing changes in performance over time with standard or design performance; comparing performance under various operating conditions; and determining the effect of changes in equipment. This Code applies to all air heaters used in industrial application, e.g., air heaters servicing steam generators and industrial furnaces. This specifically includes: combustion gas-to-air heat exchanger including air heaters with multi-section air streams; and air preheater coils utilizing noncondensing (single phase) steam, water or other hot fluids. This Code does not cover direct-fired air heaters or gas-to-gas heat exchangers. In the latter application, this Code may be used to determine both the thermal and pressure drop performance, while alternate methods of leakage measurement should be agreed upon between the parties. This Code also does not cover heat exchangers where the heating fluid is condensed while passing through the heater. Air heaters in parallel shall be tested individually (wherever possible) for purposes of checking actual performance. This Code requires pretest and post-test uncertainty analysis. The pretest uncertainty analysis is required in order to effectively plan the test. It allows corrective action to be taken prior to the test, either to decrease the uncertainty to a level consistent with the agreed-upon uncertainty, or to reduce the cost of the test while still attaining the objective. The post-test uncertainty analysis is used to determine the uncertainty intervals of the actual test. This analysis should confirm the pretest systematic and random uncertainty estimates. It serves to either validate the quality of the test results or to expose problems.
ASSE 1082-2021
Performance Requirements for Water Heaters with Integral Temperature Control Devices for Hot Water Distribution Systems
For water heaters with defined setpoint controls under various steady state flow conditions. These water heaters control the outlet temperature to specific limits and are installed within a hot water distribution system, but not at point-of-use. The water heater shall consist of a heat exchanger, a cold water inlet connection, a hot water outlet connection, and a means for precisely governing the outlet temperature. The device controller shall be listed to the appropriate electrical safety standard in accordance with the device category.
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ASSE 1084-2018e1(R2023)
Performance Requirements for Water Heaters with Temperature Limiting Capacity
Water heaters with precise output temperature control under varying flow conditions are used to provide tempered water to the user. As such, they need to limit maximum water temperature at the point of use in order to reduce and control the risks of scalding. ASSE 1084 is intended to provide a level of scald protection consistent with the current ASSE 1070 / ASME A112.1070 / CSA B125.70, Performance Requirements for Water Temperature Limiting Devices. These water heaters are not intended to limit thermal shock and are not substitutes for automatic compensative valves complying with ASSE 1016 / ASME A112.1016 / CSA B125.16, Performance Requirements for Automatic Compensating Valves for Individual Showers and Tub/Shower Combinations.
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ANSI/AHRI 1300-I-P-2013
Performance Rating of Commercial Heat Pump Water Heaters
This standard applies to factory assembled Commercial Heat Pump Water Heaters (CHPWH) defined as equipment to provide potable or service hot water using alternate sources of energy as air, water and ground (geothermal) by means of electrically driven, mechanical vapor compression refrigerant systems.
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ANSI/AHRI 1301-SI-2013
Performance Rating of Commercial Heat Pump Water Heaters
This standard applies to factory assembled Commercial Heat Pump Water Heaters (CHPWH) defined as equipment to provide potable or service hot water using alternate sources of energy as air, water and ground (geothermal) by means of electrically driven, mechanical vapor compression refrigerant systems.
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ANSI/AHRI 470-2006
Performance Rating of Desuperheater/Water Heaters
This standard applies to Desuperheater/Water Heaters supplied as separate components, as defined in Section 3 and using single component and azeotropic refrigerants only.
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ANSI/ASHRAE 118.2-2022
Method of Testing for Rating Residential Water Heaters and Residential-Duty Commercial Water Heaters
Provides test procedures for rating the efficiency and hot-water delivery capabilities of directly heated residential water heaters and residential-duty commercial water heaters. Applies to water heaters designed to be capable of providing outlet water at a controlled temperature of at least the nominal outlet water temperature under the conditions specified by this test. Dual units of measurement.
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