Refrigeration is at the heart of funeral home operations, hospitals, and mortuaries. Without a reliable cooler, preservation standards suffer. One of the most important tools in maintaining refrigeration efficiency is the 404A temp pressure chart.
This chart helps technicians and funeral directors understand the relationship between temperature and pressure in R-404A refrigerant systems — ensuring mortuary coolers operate safely, efficiently, and cost-effectively.
What is R-404A Refrigerant?
R-404A is a widely used refrigerant in commercial and industrial refrigeration systems, especially in low- and medium-temperature applications like:
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Walk-in freezers
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Mortuary coolers
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Grocery store refrigeration
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Medical cold storage
Its stability and cooling performance make it a go-to choice for mortuary coolers supplied by American Mortuary Equipment Company.
Why the 404A Temp Pressure Chart Matters
The 404A temperature pressure chart allows technicians and operators to:
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Diagnose system performance – Detect leaks, blockages, or incorrect charges.
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Maintain efficiency – Ensure the cooler operates at the right pressure-to-temperature ratio.
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Prevent costly downtime – Protect sensitive operations like mortuary storage.
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Stay compliant – Refrigeration systems must meet safety and regulatory standards.
Without referencing this chart, refrigeration maintenance becomes guesswork — a risk funeral homes cannot afford.
How to Read the 404A Temp Pressure Chart
The chart lists two critical values:
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Temperature (°F or °C)
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Pressure (PSIG – Pounds per Square Inch Gauge)
For example, at -10°F, R-404A typically shows 20.8 PSIG. If your cooler’s gauges display a significant difference, the system may be undercharged or overcharged.
Sample R-404A Temp Pressure Chart (Partial)
| Temperature (°F) | Pressure (PSIG) |
|---|---|
| -40 | 4.9 |
| -20 | 14.6 |
| -10 | 20.8 |
| 0 | 26.1 |
| 10 | 31.5 |
| 20 | 37.2 |
| 30 | 43.3 |
| 40 | 49.8 |
👉 Full charts include every 5-degree increment, giving technicians precise readings across all operational ranges.
Application in Mortuary Coolers
For funeral directors and mortuary managers, the 404A temp pressure chart ensures:
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Correct cooling temperature for body preservation
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Energy-efficient operation (lower bills over time)
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Reduced repair costs by catching issues early
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Compliance with health and safety standards
American Mortuary Equipment Company integrates 404A refrigeration systems into its coolers, ensuring funeral homes can rely on consistent performance.
Common Issues Without Chart Reference
If operators ignore the 404A chart, they may face:
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Improper cooling – leading to ethical and regulatory risks in body care
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Excessive wear on compressors – costly equipment failures
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Energy waste – skyrocketing bills from inefficiency
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Unexpected downtime – impacting funeral scheduling and operations
Best Practices for Funeral Homes & Technicians
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Regularly Monitor Gauges – Compare readings to the 404A temp pressure chart.
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Schedule Preventive Maintenance – At least twice yearly for mortuary coolers.
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Keep a Chart Handy – Technicians should always carry a laminated or digital copy.
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Work with Trusted Suppliers – American Mortuary Equipment Company ensures systems are charged and tested to spec before delivery.
American Mortuary Equipment Company Advantage
Why do funeral directors choose us over competitors like Holland Supply Co?
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Specialized Mortuary Coolers – Designed with 404A efficiency in mind.
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Affordable Pricing – The best cooler for the money.
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Nationwide Support – Installation, service, and technical training.
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Compliance Ready – Systems meet refrigeration safety standards.
Our commitment to quality ensures your mortuary coolers run reliably with optimal 404A performance.
FAQs
What is the operating pressure for 404A at 0°F?
Around 26.1 PSIG.
Can funeral homes service 404A systems themselves?
Basic monitoring is fine, but certified HVAC technicians should handle refrigerant charging.
Is 404A being phased out?
Yes, under EPA guidelines, but it remains widely used in existing systems — and we provide upgrade paths when regulations shift.
Conclusion
The 404A temp pressure chart is more than a technician’s tool — it’s the foundation of refrigeration reliability in funeral homes, hospitals, and mortuaries. By ensuring your cooler runs within correct pressure and temperature ranges, you protect both your investment and the families you serve.
At American Mortuary Equipment Company, we provide not just the best coolers for the money, but also the knowledge and support to keep them running efficiently.