This Standard specifies general requirements and test methods for direct fired air heaters, which use gas as a fuel and are intended for domestic, commercial or light industrial use with energy input not exceeding 500 MJ/h. This Standard provides requirements for appliances for portable use or fixed installation.
For Australia, the fuel gases are natural gas (as described by AS 4564) and liquefied petroleum gas (LP Gas, as described by AS 4670).
For New Zealand:
(a) The fuel gases are natural gas (as specified in NZS 5442) and general product liquefied petroleum gas (NZLPG as specified in NZS 5435).
(b) Thermal efficiency requirements are informative only, except where they relate to safety.
NOTE 1 Direct fired air heaters with inputs < 50 MJ/h fall under this Standard and are to be removed from the scope of AS/NZS 5263.1.3 at its next revision.
NOTE 2 Other statutory and regulatory requirements may be applicable to a product that falls within the scope of this Standard. It is the responsibility of the manufacturer, importer or distributor (as appropriate) to ensure that products conform to such requirements.
Methods of test are set out in Appendices ZA and ZC.

Originated in Australia as AG 404-1988.
Previous edition AS 5262-2011.
Jointly revised and redesignated as AS/NZS 5263.1.10:2019. Originated in Australia as AG 404-1988. Previous edition AS 5262-2011. Jointly revised and redesignated as AS/NZS 5263.1.10:2019. Originated in Australia as AG 404-1988. Previous edition AS 5262-2011. Jointly revised and redesignated as AS/NZS 5263.1.10:2019. Reissued incorporating Amendment 1 (March 2024).