scope:

This Standard applies to portable type gas water heaters (see Clause 3), herein after referred to as water heaters or appliances:

a) for use with propane;

b) for use with butane;

c) for use with liquified petroleum gases;

d) for use with LP gas-air mixtures;

e) having regulated pressure;

f) having non-regulated pressure.;

g) for point of use installation (dishwashing, washing, showering, etc.);

h) for supply of potable hot water;

i) for supply of non-potable hot water;

j) intended for temporary connection to inlet water lines;

k) intended for temporary connection to outlet water lines;

l) intended for outdoor installation; and

m) intended for unvented use.

Portable type water heaters and components employing materials or having forms of construction differing from those detailed in these provisions may be examined and tested according to the intent of the provisions, and if found to be satisfactorily equivalent, may be given recognition.

This Standard applies to portable water heater constructed entirely of new, unused parts.

All references to psi throughout this Standard are to be considered gauge pressures unless otherwise specified.

All accessories recommended by the manufacturer for use with appliances certified to this Standard are to be supplied and with the appliance.

The water heater may be:

a) tank type;

b) automatic storage type;

c) water-tube type;

d) instantaneous type; or

e) multifunction design such as an instantaneous-tube type (see Clause 3 Definitions).

Portable water heaters are limited to a maximum input of 75,000 BTU/hr (21 980 W).

Annex A, Items Unique to the United States, contains provisions that are unique to the United States.

Annex B, Items Unique to Canada, contains provisions that are unique to Canada.

Clause 2, Reference publications, contains a list of standards specifically referenced in this Standard, and sources from which they may be obtained.

This Standard contains SI (Metric) equivalents to the yard/pound quantities, the purpose being to allow the Standard to be used in SI (Metric) units. (IEEE/ASTM SI 10, American National Standard for Metric Practice, or ISO 80000-1:2009, Quantities and units - Part 1: General, is used as a guide in making metric conversion from yard/pound quantities.) If a value for a measurement and a corresponding value in other units are stated, the first stated value is to be regarded as the requirement. The given corresponding value may be approximate. If a value for a measurement and a corresponding value in other units are both specified as a quoted marking requirement, the first stated unit, or both shall be provided.

In this Standard, "shall" is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; "should" is used to express a recommendation or that which is advised but not required; and "may" is used to express an option or that which is permissible within the limits of the standard.

Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause is to separate from the text explanatory or informative material.

Notes to tables and figures are considered part of the table or figure and may be written as requirements.

Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.