What Is R-404 gas

R404A or Freon 404A is an HFC mix refrigerant gas. It has a blend of HFC-125, HFC-143a, HFC-134a as a proportion of 44:52:4 respectively 

It is non-flammable ASHRAE A1 safety classification refrigerant gas.

This refrigerant gas has low toxicity with 3920 global warming potential but less global warming potential than R404B.

R404A refrigerant gas has 0 ozone depletion potential. It has phased out in 2020 but reclaimed for use until 2030.


Miracle offers you high-quality R404a refrigerant gas that has all standard properties compared to R502.

It consists of five different polymers and lubricants and has a blend of HFC which has a durable compressor lifetime and excellent lubricant stability.


That’s because of its great thermodynamic and comparable physical properties.


Such as its discharge temperature can fall of 9 °C (14 °F) which is less than R502.


It is non-burning at an air temperature up to 100 °C (212 °F) at atmospheric pressure.


If you ask what refrigerant will replace R404a, that’s probably R407A refrigerant.

But R404 refrigerant is a design that will suit to replace your R-502 and R-22 all commercial and industrial refrigeration equipment applications.

People also asked whether they can mix R404a with 134a or use R134 in an R404A system, but you don’t need this.

Generally, The r404a refrigerant fit for all R502 based application as it has similarities with R502 refrigerant gas’s properties.

R404a refrigerant gas is also used for many compressor types and their condensing units.


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