Triassic Posted October 24, 2022 Share Posted October 24, 2022 I have two under floor heating manifolds, each with a dedicated circulating pump. On closer inspection, I've found they both pumps have variable speed settings. Any thoughts as to what speed these pumps should be running at? Link to comment Share on other sites More sharing options...
Adsibob Posted October 24, 2022 Share Posted October 24, 2022 24 minutes ago, Triassic said: I have two under floor heating manifolds, each with a dedicated circulating pump. On closer inspection, I've found they both pumps have variable speed settings. Any thoughts as to what speed these pumps should be running at? I think standard practice is to put them on the slowest setting, but I’m not sure why. Link to comment Share on other sites More sharing options...
ProDave Posted October 24, 2022 Share Posted October 24, 2022 Slowest setting that gives the required flow rates on the flow meters. Both quieter, and uses a little less electricity. Link to comment Share on other sites More sharing options...
Nickfromwales Posted October 24, 2022 Share Posted October 24, 2022 Yup. Flow can be stupidly low, but still give you the heat you require. A lot to do with the type of emitter though, eg thick vs thin ( slab vs screed ) will perform very differently. Link to comment Share on other sites More sharing options...
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