scope:

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.

f. For installation in applications intended to temper the entire flow of the primary circulating pool loop water prior to re-entering the pool.

g. For installation in applications for pool heaters intended to temper a portion of the primary circulating loop water diverted through the pool heater by mechanical means and then re-enter and mix with the primary circulating loop water prior to entering the pool.