Morning Mr Mark, just meant to save up and use a registered installer to meet Nillumbik's requirements here. AB's carpenter said the same to him and refused to install his one. Going by the VBA link here says it needs to be a registered and or licenced mechanical services installer to AS/NZS 2918
http://www.vba.vic.gov.au/__data/ass...el-Heaters.pdf
Like the team here have mentioned, insurance will not cover if the worst were to happen as you won't have a certificate on file, take care mate :-)