Fun fact: when it is cold, and you need more heat inside you, it doesn't take any energy at all. In fact nothing takes energy, except physical work.
The same is true for households, if it's winter, and you have the heating on, washing clothes, cooking, mining bitcoin, they are all free, since every Joule metered in the electricity meter converts to heat.
That is a fun fact, but it's not universally true. If that "work" includes endothermic reactions, like hydrolysis, then it would run counter to your heater.
But off the top of my head I can't think of any household or bodily processes that would be endothermic so functionally I think you're correct.
The same is true for households, if it's winter, and you have the heating on, washing clothes, cooking, mining bitcoin, they are all free, since every Joule metered in the electricity meter converts to heat.