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M1403.1 Heat Pumps
Electric heat pumps shall be listed and labeled in accordance with UL 1995 or UL/CSA/ANCE 60335-2-40.

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E3703.1 Branch Circuit and Feeder Requirements, Branch Circuits for Central Heating
-conditioning equipment, and auxiliary equipment directly associated with the central heating equipment such as pumps, motorized valves, humidifiers ...