适用于符合NZS 4602和NZS 4606要求的储热式热水器在家用和轻型商业设施中的安装，储热式热水器安装有泄压阀，而不是开式通风口。（关于开放式通风系统，请参见NZS 4603。）参考BIA批准的文件G12。

Applies to installation in domestic and light commercial establishments of thermal storage water heaters complying with NZS 4602 and NZS 4606 fitted with a pressure relief valve instead of an open vent. (For open vented systems see NZS 4603.) Referenced in BIA Approved Document G12.