R-290 vs R-744 (CO2)
Side-by-side refrigerant comparison with pressure-temperature data
Properties Comparison
| Property | R-290 | R-744 (CO2) |
|---|---|---|
| Type | Pure | Pure |
| GWP | 3 | 1 |
Pressure-Temperature Comparison (PSIG)
| Temp (°F) | R-290 (psig) | R-744 (CO2) (psig) | Difference |
|---|---|---|---|
| -40°F | -3.1 | 126.2 | -129.3 |
| 40°F | 62.4 | 516.0 | -453.6 |
| 50°F | 75.1 | 586.2 | -511.1 |
| 60°F | 89.2 | 663.4 | -574.2 |
Frequently Asked Questions
What is the difference between R-290 and R-744 (CO2)?
R-290 has a GWP of 3 and is a pure refrigerant, while R-744 (CO2) has a GWP of 1 and is a pure refrigerant. They have different operating pressures, capacity characteristics, and application ranges.
Can I replace R-290 with R-744 (CO2)?
Direct replacement between R-290 and R-744 (CO2) is not recommended without thorough system evaluation. Check compressor compatibility, oil type, pressure ratings, and safety classification before any refrigerant change.
Which has lower GWP, R-290 or R-744 (CO2)?
R-744 (CO2) has a lower GWP (1) compared to R-290 (3).