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About This Item
Full Description
1.1 Scope
1.1.1 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.
1.1.2 This standard also applies to pool heaters intended for installation at a distance less than 5 feet (1.52 m) from the inside surface of a pool or spa, hereinafter referred to as close proximity heaters (see Part IV, Definitions).
1.1.3 This standard also applies to pool heaters for indoor installation with draft hoods which are factory equipped with automatic vent damper devices (see Part IV, Definitions), hereinafter referred to as vent damper devices.
1.1.4 This standard also applies to pool heaters of other than the direct vent type which are factory equipped with electrically operated or mechanically actuated automatic flue damper devices (see Part IV, Definitions), hereinafter referred to as flue damper devices.
1.1.5 If a value for measurement as given in this standard is followed by an equivalent value in other units, the first stated value is to be regarded as the specification.
1.1.6 All references to psi throughout this standard are to be considered gage pressure unless otherwise specified.
1.1.7 Exhibit D contains provisions that are unique to the United States.
1.1.8 Exhibit E contains provisions that are unique to Canada.
1.1.9 Special construction provisions applicable to a water heater designed for use with an optional listed conversion kit are outlined under Exhibit F (Optional Provisions of Listed Gas Appliance Conversion Kits.)
1.1.10 Exhibit G contains a list of standards referenced in this standard, and sources from which these reference standards may be obtained.
Document History
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CSA 4.7:19/ANSI Z21.56:19
Gas-Fired Pool Heaters- Most Recent
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CSA ANSI Z21.56-2017/CSA 4.7-2017
Gas-Fired Pool Heaters- Historical Version
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CSA ANSI Z21.56-2014/CSA 4.7-2014
Gas-Fired Pool Heaters- Historical Version
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CSA ANSI Z21.56-2013/CSA 4.7-2013
Gas-Fired Pool Heaters- Historical Version
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CSA ANSI Z21.56-2006/CSA 4.7-2006
Gas-Fired Pool Heaters (Includes Errata 2008)- Historical Version
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CSA ANSI Z21.56-2001/CSA 4.7-2001
viewing
Gas-Fired Pool Heaters- Historical Version
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CSA ANSI Z21.56B-2000/4.7B-2000
Addenda 2 to ANSI Z21.56-1998/CSA 4.7-M98 and ANSI Z21.56A-2000/CSA 4.7A-M00, Gas-Fired Pool Heaters- Historical Version
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CSA ANSI Z21.56A-2000/4.7A-M00
Addenda 1 to ANSI Z21.56-1998/CSA 4.7-M98, Gas-Fired Pool Heaters- Historical Version