# Reference charts for field techs

Free reference charts techs use on the job, starting with refrigerant pressure-temperature charts. Values are computed from published thermophysical property data, show bubble and dew points for blends, and note the date and library version. Always confirm against the equipment manufacturer's installation instructions.

## Reference charts

- [R-22 PT Chart (Pressure-Temperature)](https://www.brix.so/reference/refrigerant-pt-chart/r-22): R-22 pressure-temperature chart from −40°F to 150°F in psig, plus where R-22 stands after EPA ended production in 2020 and what retrofits require.
- [R-32 PT Chart (Pressure-Temperature)](https://www.brix.so/reference/refrigerant-pt-chart/r-32): R-32 pressure-temperature chart, −40°F to 150°F in psig, one column because R-32 is a pure refrigerant. A2L safety notes, GWP 675 and a PT lookup.
- [R-410A PT Chart (Pressure-Temperature)](https://www.brix.so/reference/refrigerant-pt-chart/r-410a): R-410A pressure-temperature chart from −40°F to 150°F in psig, computed with CoolProp, plus a quick lookup and what the 2026 EPA rule change means.
- [R-454B PT Chart (Pressure-Temperature)](https://www.brix.so/reference/refrigerant-pt-chart/r-454b): R-454B pressure-temperature chart from −40°F to 150°F with bubble (liquid) and dew (vapor) psig, a quick lookup, °F/°C toggle and how to read glide.
- [Refrigerant PT Charts (Pressure-Temperature)](https://www.brix.so/reference/refrigerant-pt-chart): Refrigerant pressure-temperature charts for R-410A, R-454B, R-32 and R-22, computed with CoolProp, plus a side-by-side comparison and how to read them.

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