Low-Delta-T Diagnostic Quiz - Koven Air

Low-Delta-T Diagnostic Quiz

Tap each symptom that matches your chilled-water fan coil system. This checklist mirrors the classic Low-Delta-T Syndrome contributors described above — it’s a self-diagnosis starting point, not a substitute for a full valve-authority calculation.

Check what applies to your system

Supply/return temperature split is smaller than design (e.g., 1-2°C instead of a 5°C design split)

Some zones run noticeably colder or hotter than others on the same loop

The circulation pump runs at full speed nearly all the time, regardless of load

Valves were selected/sized by pipe diameter rather than by a Kv/authority calculation

The system uses 3-way diverting valves rather than 2-way modulating or PICV valves

No static or dynamic balancing valve was installed at commissioning

Result

0 of 6 symptoms selected

Assessment

Select symptoms above to see your assessment

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