Subcooling Calculator
Liquid-line subcooling — the TXV-system charging metric.
Subcooling proves a solid liquid seal feeding the TXV. Check the nameplate: most residential TXV units specify ~10 ± 3 K.
Formula
Subcooling Calculator is a free subcooling calculator for HVAC designers, technicians and energy auditors — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Subcooling Calculator
Liquid-line subcooling — the TXV-system charging metric. The calculation implements SC = T_saturation(P_discharge) − T_liquid_line (Manufacturer charging charts; ESCO refrigeration). Subcooling proves a solid liquid seal feeding the TXV. Check the nameplate: most residential TXV units specify ~10 ± 3 K.
How to use Subcooling Calculator
- 1Enter Saturation temp (high-side gauge) in °C.
- 2Enter Liquid line temperature in °C.
- 3Read Subcooling instantly — no submit button needed.
Why use Subcooling Calculator?
- ✓Implements the standard formula — SC = T_saturation(P_discharge) − T_liquid_line
- ✓Reference cited on-page: Manufacturer charging charts; ESCO refrigeration
- ✓Built-in engineering verdict flags out-of-range results instantly
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Subcooling Calculator use?+
It computes SC = T_saturation(P_discharge) − T_liquid_line, per Manufacturer charging charts; ESCO refrigeration. The formula is displayed under the result.
What should I keep in mind when using this calculator?+
Subcooling proves a solid liquid seal feeding the TXV. Check the nameplate: most residential TXV units specify ~10 ± 3 K.
Is this based on ASHRAE methods?+
The calculations follow the standard ASHRAE/ISHRAE formulations cited under the result, simplified where industry practice does the same. For permit-grade design, confirm with the full code procedure.
Is the Subcooling Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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