Last Updated: August 10, 2026

hometafy supports HVAC professionals with comprehensive technical documentation, safety guidelines, and calculation tools directly on this page. The quick-reference safety summaries below cover every refrigerant we distribute; for the full official Safety Data Sheet (SDS) for a specific lot or cylinder, contact our technical support team at contact@hometafy.com.

Safety Data Sheets (SDS) — Quick Reference Safety Summaries

The summaries below cover the critical handling, storage, and emergency-response information for each refrigerant hometafy distributes. Values are general industry reference data — always verify against the manufacturer's official SDS and your system's data plate before servicing.

R-410A (Puron)

  • Composition: 50/50 blend of R-32 and R-125 (HFC)
  • ASHRAE safety class: A1 (non-flammable, low toxicity)
  • GWP: ~2088
  • Boiling point: -51.4°F (-46.1°C)
  • Hazards: High-pressure gas; can cause asphyxiation in confined spaces and frostbite on skin or eye contact
  • Storage: Store cylinders upright in a cool, well-ventilated area away from heat and direct sunlight; never store above 125°F (52°C)
  • Handling: Use only pressure-rated equipment rated for R-410A; incompatible with R-22 systems; requires POE (polyolester) lubricant
  • First aid: Move to fresh air immediately; for frostbite, flush the affected area with lukewarm water and seek medical attention

R-134a

  • Composition: Single-component HFC (tetrafluoroethane)
  • ASHRAE safety class: A1
  • GWP: ~1430
  • Boiling point: -14.9°F (-26.1°C)
  • Hazards: Asphyxiant in high concentrations; frostbite risk
  • Storage: Cool, well-ventilated area; cylinders upright
  • Handling: Compatible with PAG and POE lubricants; standard automotive and commercial A/C service equipment
  • First aid: Move to fresh air; flush frostbite with lukewarm water; seek medical attention if symptoms persist

R-22 (Freon)

  • Composition: Single-component HCFC (chlorodifluoromethane)
  • ASHRAE safety class: A1
  • GWP: ~1810
  • Boiling point: -41.4°F (-40.8°C)
  • Hazards: Asphyxiant; ozone-depleting — new production is banned under the Montreal Protocol
  • Storage: Cool, well-ventilated area; cylinders upright
  • Handling: Legacy systems only; uses mineral or alkylbenzene lubricant; reclaimed supply certified to AHRI-700
  • First aid: Move to fresh air; flush frostbite; seek medical attention

R-32

  • Composition: Single-component HFC (difluoromethane)
  • ASHRAE safety class: A2L (mildly flammable)
  • GWP: ~675
  • Boiling point: -61.1°F (-51.7°C)
  • Hazards: Mildly flammable; asphyxiant; high operating pressure; charge limits apply based on room volume per ASHRAE 15 and 34
  • Storage: Cool, well-ventilated area away from ignition sources; cylinders upright
  • Handling: Use dedicated R-32 service equipment; do not mix with R-410A systems; follow the manufacturer's charge-limit calculation for the installed space
  • First aid: Move to fresh air; eliminate ignition sources; flush frostbite; seek medical attention

R-404A

  • Composition: Blend of R-125/143a/134a (44/52/4)
  • ASHRAE safety class: A1
  • GWP: ~3922
  • Boiling point: -51.5°F (-46.5°C)
  • Hazards: Asphyxiant; high pressure
  • Storage: Cool, well-ventilated area; cylinders upright
  • Handling: Commercial and low-temperature refrigeration; requires POE lubricant; subject to high-GWP phase-down regulations
  • First aid: Move to fresh air; flush frostbite; seek medical attention

R-407C

  • Composition: Blend of R-32/125/134a (23/25/52)
  • ASHRAE safety class: A1
  • GWP: ~1774
  • Boiling point: -46.4°F (-43.6°C) with a temperature glide of about 13°F (7°C)
  • Hazards: Asphyxiant; high pressure
  • Storage: Cool, well-ventilated area; cylinders upright
  • Handling: Common R-22 retrofit; requires POE lubricant; account for temperature glide when charging (charge liquid-phase only)
  • First aid: Move to fresh air; flush frostbite; seek medical attention

Pressure-Temperature (PT) Quick Reference

Saturated pressures (psig) at common coil temperatures. Values are approximate industry reference data — verify against the manufacturer's published PT chart and your system data plate before charging.

Temp R-410A R-134a R-22 R-32 R-404A R-407C
40°F118 psig35 psig69 psig95 psig79 psig70 psig
60°F163 psig57 psig102 psig131 psig117 psig104 psig
80°F218 psig87 psig144 psig176 psig165 psig146 psig
100°F286 psig124 psig196 psig230 psig224 psig198 psig
120°F366 psig169 psig260 psig297 psig295 psig260 psig

Cylinder Specifications & Weights

  • 25 lb R-410A disposable cylinder: tare ~16 lb, gross ~41 lb, DOT-39 specification
  • 30 lb R-134a cylinder: tare ~17 lb, gross ~47 lb, DOT-39 specification
  • 50 lb R-22 cylinder: tare ~24 lb, gross ~74 lb, returnable DOT-4BA steel
  • 125 lb R-410A recoverable cylinder: tare ~38 lb, gross ~163 lb, returnable DOT-4BW steel
  • 1,000 lb ASME recovery tank: tare ~310 lb, working pressure 480 psig, used for reclaim storage

Cylinder tare weights vary by manufacturer and manufacture date. Always confirm the tare weight stamped on the cylinder before charging.

Superheat and Subcooling Calculation

Superheat measures how much the suction vapor is heated above its saturation temperature at evaporator pressure.

  1. Measure the suction-line temperature at the evaporator outlet.
  2. Read the suction pressure and convert it to a saturated temperature using the PT chart above.
  3. Superheat = suction-line temperature − saturated suction temperature.

Subcooling measures how much the liquid refrigerant is cooled below its saturation temperature at condenser pressure.

  1. Measure the liquid-line temperature at the condenser outlet.
  2. Read the liquid pressure and convert it to a saturated temperature using the PT chart above.
  3. Subcooling = saturated liquid temperature − liquid-line temperature.

Target ranges vary by equipment — always follow the manufacturer's published charging method. Typical residential split systems run 10°F to 20°F superheat and 8°F to 15°F subcooling.

EPA Section 608 Compliance Checklist

  • Verify the servicing technician holds a valid EPA Section 608 certification (Core plus Type I, II, III, or Universal)
  • Use only EPA-certified refrigerant recovery equipment
  • Evacuate the appliance to the required EPA vacuum level before opening the system
  • Recover refrigerant before any service that would vent or release it
  • Log every recovery: date, refrigerant type, amount (lb), technician ID, and destination (recycled, reclaimed, or destroyed)
  • For systems with a full charge of 50 lb or more, perform a leak inspection at least once per calendar year (semi-annual for commercial refrigeration of 500 lb or more)
  • Repair leaks within 30 days of detection, or document a retrofit or retirement plan
  • Maintain all refrigerant records for a minimum of three years

Refrigerant Recovery and Recycling Guidelines

  • Recover refrigerant before opening any part of the system; never vent to atmosphere
  • Use a dedicated, EPA-certified recovery machine and a properly rated recovery tank
  • Never mix different refrigerants in the same recovery tank — cross-contamination ruins the reclaimed gas value and can damage equipment
  • Label every recovery tank with the refrigerant type, date, and technician
  • Send reclaimed gas to an EPA-certified reclaimer for AHRI-700 re-certification before resale or reuse

Leak Detection and Repair Protocol

  • Perform an annual leak inspection on systems with a charge of 50 lb or more (semi-annual for 500 lb or more)
  • Use approved methods: electronic leak detector, soap-bubble solution, ultrasonic detection, or pressure-decay testing
  • Check common leak points: service valves, Schrader cores, flare and brazed fittings, evaporator and condenser coils, and compressor seals
  • Repair leaks within 30 days of detection, or document a retrofit or retirement schedule
  • Re-test the repaired system under pressure after the repair and before recharging

Need a specific technical reference not covered here? Contact our technical support team at contact@hometafy.com or call +1 2567891238.