I know that the heating systems, whether combi or system boiler, in every house I’ve owned have always had at least one radiator without a TRV, usually in a hall or cloakroom. And I don’t think any of the towel rails have had them either. I moved this year to a newish conversion in a red brick Victorian hospital building, which claims to be carbon neutral, and has a district heating system that provides hot water and central heating. I just have a heat exchange unit in the utility room that draws heat as needed, but even so there’s a radiator in the hall without a TRV.
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