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10/12/2025 7:09 pm
All supplier surveys I've had, as well as tools like Heatpunk, assume the same dT (typically 5°C) across all radiators. In my house, with 8mm microbore radiator tails, that leads to very high flow velocity and pressure loss on the index circuit. Is there a reason not to run a higher dT (say 8°C) on some radiators to lower flow velocity and pressure loss? Other radiators could then run a lower dT so the heat pump still sees a combined dT of 5°C?
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