In some contexts, the term domestic can be used to refer to things that are related to the home or household. In this sense, the term domestic may be used as an adjective to describe things that are used or consumed within the home, such as domestic appliances or domestic energy.
In this context, the term domestic may be used to distinguish things that are used or consumed within the home from those that are used or consumed outside the home, such as in a business or public setting.
For example, domestic electricity refers to electricity that is used within a home or residential setting, while non-domestic electricity refers to electricity that is used in a business or other non-residential setting. Similarly, domestic water refers to water that is used within a home or residential setting, while non-domestic water refers to water that is used in a business or other non-residential setting.
In this sense, the term domestic may be used to describe things that are related to the home or household, but it does not necessarily mean that something is residential or used for living purposes.