No unit oil change required, unlike other R-22 alternatives.
With no measurable pressure difference to R-22, retrofitting with R-421A is simple and familiar.
A blend of only 2 refrigerants, R-421A exhibits consistent box temperatures
With millions of units successfully retrofitted, R-421A is The Easy Choice for contractors.
Note: Technician certification required to complete purchase
The closest Pressure-Tempature match to R-22
No Unit Modification
Does not contain Flammable Components
Temp (F) |
Liquid Phase Pressure (psig) | Vapor Phase Pressure (psig) |
|---|
| -50 | -3.1 | -5.9 |
| -45 | -1.4 | -4.6 |
| -40 | 0.5 | -3.0 |
| -35 | 2.5 | -1.3 |
| -30 | 4.8 | 0.7 |
| -25 | 7.4 | 2.8 |
| -20 | 10.1 | 5.2 |
| -15 | 13.2 | 7.8 |
| -10 | 16.5 | 10.7 |
| -5 | 20.1 | 13.9 |
| 0 | 24.0 | 17.3 |
| 5 | 28.2 | 21.1 |
| 10 | 32.8 | 25.2 |
| 15 | 37.8 | 29.7 |
| 20 | 43.1 | 34.6 |
| 25 | 48.9 | 39.8 |
| 30 | 55.0 | 45.5 |
| 35 | 61.7 | 51.6 |
| 40 | 68.7 | 58.1 |
| 45 | 76.3 | 65.2 |
| 50 | 84.3 | 72.7 |
| 55 | 92.9 | 80.8 |
| 60 | 102.0 | 89.4 |
| 65 | 111.7 | 98.5 |
| 70 | 122.0 | 108.3 |
| 75 | 132.9 | 118.7 |
| 80 | 144.4 | 129.8 |
| 85 | 156.6 | 141.5 |
| 90 | 169.5 | 153.9 |
| 95 | 183.1 | 167.1 |
| 100 | 197.4 | 181.0 |
| 105 | 212.4 | 195.7 |
| 110 | 228.3 | 211.2 |
| 115 | 244.9 | 227.6 |
| 120 | 262.4 | 244.9 |
| 125 | 280.8 | 263.1 |
| 130 | 300.1 | 282.2 |
| 135 | 320.3 | 302.4 |
| 140 | 341.5 | 323.6 |
| 145 | 363.6 | 346.0 |
| 150 | 386.9 | 369.5 |
Available in 12lb and 25lb cylinders, Choice R-421A is designed to run in air-conditioning, and mid-to high-temp applications.
Designed to Perform
We designed R-421A to have a nearly identical pressure-temperature (PT) relationship as R-22. This is a key factor in retrofitting air-conditioners and heat pumps without significant deviations in general operation and TXV metering. With R-421A, there is no unit modification needed -saving you time and money.
Consistent Temperatures
Many R-22 alternatives on the market have 3, 4 and even 5 separate refrigerant components that comprise the blend. Each of these components have a unique PT curves that can vary from one another widely. This is known as temperature glide, and glide is a big problem. Glide causes inconsistent evaporator temperatures, resulting in performance degradation .
This is why we designed R-421A to have only 2 refrigerant components and the lowest temperature glide of the leading R-22 alternatives.
Compressor Friendly
We’ve packaged R-421A with a proprietary lubricant, designed to facilitate oil return to the compressor.
R-421A is covered under U.S. Patents US 8,197,706 & US 9,982,179. Foreign Patent pending.
