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Choice 421A

  • 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.

Features

 
The closest Pressure-Tempature match to R-22

The closest Pressure-Tempature match to R-22

No Unit Modification

No Unit Modification

Does not contain Flammable Components

Does not contain Flammable Components

SIMPLE. RELIABLE. SAFE.

R-421A PT Chart

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

 

421a cylinder v1.png
 
R421A Cylinder
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Product Details

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.

Additional Information

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