How much does it cost to have someone install a water heater? by admin | Nov 8, 2020 | FAQ | 0 comments Hot water system installers in New South Wales charge about $80/hr for a standard job. Getting the help of professional hot water system installers is a must. This is to ensure that your unit will be functioning properly for years to come. Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment.