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ANSI Z21.56-2006/CSA 4.7-2006

Gas-Fired Pool Heaters

This standard applies to newly produced pool heaters (see Part IV, Definitions), hereinafter referred to as pool heaters or appliances, constructed entirely of new, unused parts and materials, for heating nonpotable water stored at atmospheric pressure, such as water in swimming pools, spas, hot tubs and similar applications: a. For use with natural gas; b. For use with manufactured gas; c. For use with mixed gas; d. For use with liquefied petroleum gases; and e. For use with LP gas-air mixtures.

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CSA America, Inc. [csa]

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Addenda 1 to ANSI Z21.56-2006/CSA 4.7-2006, Gas-Fired Pool Heaters
Document History
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As the voice of the U.S. standards and conformity assessment system, the American National Standards Institute (ANSI) empowers its members and constituents to strengthen the U.S. marketplace position in the global economy while helping to assure the safety and health of consumers and the protection of the environment.