KOOLIN R-454B · 22 LB
R-454B Refrigerant for Compatible HVAC & Heat Pumps
KOOLIN R-454B is an A2L refrigerant blend for air-conditioning and heat-pump equipment specifically designed and approved for R-454B. Factory-sealed 22 lb cylinder engineered for commercial contractors and residential HVAC installations complying with modern low-GWP standards.
Safety Class
A2L (Mildly Flammable)
Net Refrigerant
22 lb Factory-Sealed Cylinder
GWP & Chemistry
GWP ~466 · Blend (R-32 / R-1234yf)
Technical Specifications & Chemical Properties
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ASHRAE Safety Rating: A2L (Mildly Flammable, Non-Toxic)
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Chemical Composition: 68.9% R-32 (Difluoromethane) / 31.1% R-1234yf (2,3,3,3-Tetrafluoropropene)
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Global Warming Potential (GWP): ~466 (over 75% reduction vs R-410A)
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Compatible Compressor Lubricant: Polyolester Oil (POE)
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Cylinder Valve Connection: Left-Hand Reverse Thread (LH fitting for A2L safety)
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Boiling Point: Approx. -50.8°C (-59.4°F)
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Net Cylinder Weight: 22 lbs (9.98 kg)
R-454B Product Overview & Industry Transition
R-454B is the leading low-GWP replacement for R-410A across new residential and commercial HVAC split systems, packaged rooftop units, and high-efficiency heat pumps. Designed to meet EPA AIM Act phasedown mandates, R-454B delivers nearly identical operating pressures and superior energy efficiency while maintaining critical temperature glide stability under typical operating conditions.
Common Compatible Applications
- Residential split-system air conditioning engineered specifically for R-454B
- Modern variable-speed and multi-stage heat pumps
- Compatible light-commercial rooftop HVAC units (RTUs) and packaged equipment
- OEM chillers and DX commercial systems engineered with factory A2L leak mitigation systems
A2L Service Equipment & Safety Requirements
Because R-454B carries an A2L mild flammability rating, standard service protocols require dedicated A2L-compatible service tools:
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Left-Hand (LH) Valve Fitting: Cylinders feature reverse left-hand threads. Ensure service hoses or manifolds have appropriate A2L reverse-thread adapters.
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Spark-Proof Tools: Utilize brushless/sealed spark-free recovery machines and A2L-rated vacuum pumps.
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Refrigerant Leak Detectors: Use electronic leak detectors calibrated and certified for A2L refrigerants.
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Ventilation: Ensure adequate work-area ventilation and avoid open flames or unrated electrical switches in enclosed spaces.
Before You Order
- Confirm that equipment nameplates and manufacturer documentation specify R-454B.
- Verify system charge requirements and weigh-in service procedures.
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EPA Requirement: Intended for purchase and servicing by EPA Section 608 certified technicians and HVAC/R businesses.
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Safety Data Sheet (SDS): Review handling, storage, and transport guidelines prior to installation.
Frequently Asked Questions
Can R-454B be used as a drop-in replacement in an existing R-410A system?
No. R-454B is not a drop-in replacement. It must only be used in systems specifically engineered, factory-tested, and listed for A2L refrigerants, featuring proper electrical spark containment and mitigation sensors.
Why does the R-454B cylinder have a left-hand thread valve?
Industry safety standards mandate reverse left-hand (LH) threads on A2L cylinder valves to prevent technicians from accidentally connecting standard charging hoses and charging A2L gas into incompatible non-A2L equipment.
What lubricant is recommended with R-454B?
R-454B requires synthetic Polyolester (POE) oil. Always consult the compressor manufacturer's specifications for the exact viscosity grade.
How is KOOLIN R-454B packaged and delivered?
Each cylinder is factory-sealed and shipped via authorized hazmat ground transport or commercial freight across the contiguous 48 US states. For wholesale volume or pallet orders (50+ cylinders), visit our bulk quote page.
Compare compatible options: R-410A, R-32, and R-407C. For commercial inquiries, contact KOOLIN.
Helpful resource: Read our comprehensive R-454B vs R-410A comparison.
