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About This Item

 

Full Description

Scope

1.1
This Standard applies to newly produced, large automatic storage water heaters having input ratings above 75,000 Btu/hr (21 980 W), instantaneous water heaters, circulating water heaters including booster water heaters (see Clause 3, Definitions), hereinafter referred to as water heaters or appliances, constructed entirely of new, unused parts and materials:
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;
e) for use with LP gas-air mixtures;
f) for recreational vehicle installation for use with liquefied petroleum gases only (see Clause 4.1.27);
g) for manufactured home (mobile home) installation convertible for use with natural gas and liquefied petroleum gases when provision is made for the simple conversion from one gas to the other (see Clause 4.1.26);
h) for recreational vehicle installation convertible for use with natural gas and liquefied petroleum gases when provision is made for the simple conversion from one gas to the other (see Clause 4.1.27); and
i) for use with combination potable water/space heating applications (see Clauses 3, Definitions, and 4.1.30).

Automatic storage water heaters having input ratings of 75,000 Btu/hr (21 980 W) or less are covered in Volume I.

1.2
Instantaneous water heaters with input ratings of 200,000 Btu/h (58 614 W) or less, which are designed to deliver water at a controlled temperature of less than 180 °F (82 °C), are subject to Federal minimum efficiency requirements for residential water heaters or covered in Clause 8, Items unique to Canada, are exempt from recovery, thermal efficiencies and standby loss, and related markings required by this Standard.

1.3
Direct vent water heaters anticipated by this Standard are essentially balanced flue appliances with the air intake and vent outlet in close proximity. Other designs are to be subjected to such additional tests as believed necessary at the discretion of the testing agency.

1.4
Water heaters for installation in recreational vehicles are to be of the direct vent type.

1.5
This Standard also applies to water heaters with draft hoods which are factory equipped with automatic vent damper devices (see Clause 3, Definitions), hereinafter referred to as vent damper devices.

1.6
This Standard also applies to water heaters of other than the direct vent type which are factory equipped with electrically operated or mechanically actuated automatic flue damper devices (see Clause 3, Definitions), hereinafter referred to as flue damper devices.
 

Document History

  1. CSA 4.3:19/ANSI Z21.10.3:19


    Gas-fired water heaters, volume III, storage water heaters with input ratings above 75,000 Btu per hour, circulating and instantaneous

    • Most Recent
  2. CSA 4.3-2017/ANSI Z21.10.3-2017

    👀currently
    viewing


    Gas Water Heaters - Volume III, Storage Water Heaters, With Input Ratings Above 75,000 Btu Per Hour, Circulating and Instantaneous, Includes Errata No. 1 (April 2019) and Errata No. 2 (August 2019)

    • Historical Version
  3. CSA ANSI Z21.10.3-2015/CSA 4.3-2015


    Gas Water Heaters - Volume III, Storage Water Heaters, With Input Ratings Above 75,000 Btu Per Hour, Circulating and Instantaneous

    • Historical Version
  4. CSA ANSI Z21.10.3-2014/CSA 4.3-2014


    Gas Water Heaters - Volume III, Storage Water Heaters, With Input Ratings Above 75,000 Btu Per Hour, Circulating and Instantaneous

    • Historical Version
  5. CSA ANSI Z21.10.3-2013/CSA 4.3-2013


    Gas Water Heaters - Volume III, Storage Water Heaters, With Input Ratings Above 75,000 Btu Per Hour, Circulating and Instantaneous

    • Historical Version
  6. CSA ANSI Z21.10.3-2011/CSA 4.3-2011


    Gas Water Heaters - Volume III, Storage Water Heaters, With Input Ratings Above 75,000 Btu Per Hour, Circulating and Instantaneous

    • Historical Version
  7. CSA ANSI Z21.10.3-2004/CSA 4.3-2004


    Gas Water Heaters - Volume III, Storage Water Heaters, With Input Ratings Above 75,000 Btu Per Hour, Circulating and Instantaneous

    • Historical Version