REFRIGERANT GAS MAXREF R‑404A

Mexref R-404A is a widely used HFC refrigerant blend formulated from R-125 (44%), R-143a (52%), and R-134a (4%). For decades, it has been the industry standard for commercial refrigeration across supermarkets, food processing facilities, cold rooms, and transport applications. Known for its excellent cooling performance at very low evaporating temperatures, Mexref R-404A ensures reliable preservation of perishable goods in demanding environments such as blast freezers and refrigerated transport fleets.

With zero Ozone Depletion Potential (ODP = 0) and ASHRAE A1 safety classification (non-toxic, non-flammable), R-404A is considered safe for a wide range of refrigeration applications. However, its very high Global Warming Potential (GWP ~3920) has led to regulatory restrictions under the EU F-Gas Regulation and Kigali Amendment, prompting gradual replacement by lower-GWP refrigerants such as R-448A, R-449A, and R-452A.

Despite regulatory pressures, Mexref R-404A remains one of the most common refrigerants for ultra-low temperature applications, thanks to its performance reliability and strong OEM support.

Key Features:

• High Cooling Capacity – Delivers excellent refrigeration performance even in sub-zero and ultra-low temperature applications.

• Zero Ozone Depletion (ODP = 0) – Environmentally safer than legacy HCFCs like R-502 or R-22.

• ASHRAE A1 Safety Classification – Non-toxic and non-flammable, making it safe for food and commercial environments.

• Industry Standard Refrigerant – Longstanding use across cold chain logistics, supermarkets, and food storage.

• Reliable and Well-Supported – Available worldwide, with established servicing practices and OEM approvals.

Applications:

• Supermarkets & Hypermarkets – Freezers, refrigerated display cabinets, and cold aisles.

• Cold Storage & Warehousing – Walk-in cold rooms and large storage depots.

• Transport Refrigeration – Refrigerated trucks, trailers, and shipping containers.

• Blast Freezers – Rapid freezing systems for food processing and preservation.

• Ice Cream & Frozen Food Display Units – Reliable performance at very low evaporation temperatures.

Usage:

• Charge in Liquid Form – To maintain blend integrity and ensure consistent performance.

• Leak Detection & Recovery – Essential due to high GWP; strict adherence to F-Gas regulations is required.

• Use POE Oils – Only compatible with synthetic Polyol Ester lubricants; mineral oils are not suitable.

• System Compatibility – Not recommended for direct retrofits of R-22 or R-502 systems due to different thermodynamic profiles.

• Servicing Standards – Follow OEM guidelines and SAE/ASHRAE best practices for handling high-GWP refrigerants.

Benefits at a Glance:

• Proven track record as a global standard for low-temp refrigeration

• Safe (A1 classification) and non-ozone depleting

• Strong cooling capacity for critical cold chain applications

• Supported by a large supply and servicing network worldwide

• Reliable performance under harsh temperature conditions

FAQs:

Can Mexref R-404A directly replace R-22 systems?
No. R-404A operates with different pressure and temperature characteristics than R-22. Retrofitting would require significant modifications, and in most cases, system redesign or replacement is recommended.

Is R-404A environmentally safe?
It has zero ODP, making it safe for the ozone layer. However, its very high GWP (~3920) makes it one of the least climate-friendly refrigerants in widespread use today, which is why global phase-down programs are limiting its use.

What maintenance is required with R-404A systems?
Due to its high GWP, systems charged with R-404A require frequent leak detection, proper refrigerant recovery, and recycling practices to minimize environmental impact.

Is R-404A being phased out?
Yes, in many regions. While it is still widely available, regulations are encouraging transition to lower-GWP alternatives such as R-448A, R-449A, and R-452A.