R-1234ze
C₃H₂F₄R-1234ze (1,3,3,3-tetrafluoropropene, HFO-1234ze) is a hydrofluoroolefin refrigerant with ultra-low GWP of less than 1, used primarily in commercial and industrial applications. The trans isomer (R-1234ze(E)) is used in centrifugal chillers, heat pumps, and as a foam blowing agent. R-1234ze offers excellent thermodynamic properties for medium-pressure applications with minimal environmental impact. Classified as A2L (mildly flammable) with relatively low flammability, R-1234ze is also used as a component in refrigerant blends like R-448A. The refrigerant is particularly suitable for large commercial buildings, district cooling, and industrial process cooling where its low-GWP benefits can be maximized.
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Key Information
Essential safety and exposure information for R-1234ze
Health Effects
Low acute toxicity. A2L mildly flammable classification. Excellent environmental profile with GWP less than 1.
Common Sources
- Positive displacement chillers
- scroll compressors
- foam blowing
Exposure Limits
- WEEL
- 800 ppm (8-hr TWA)
- A2L flammable
- A2L flammable
- HFO refrigerant
- HFO refrigerant
Regulatory Status
- EPA Classification
- HFO (non-ODS)
- ASHRAE Safety Group
- A2L (low toxicity, mildly flammable)
- GWP (AR5)
- <1
- ODP
- 0
- LFL
- 7.6% by volume (trans isomer)
- EPA SNAP
- Listed as acceptable for various applications
Detection Requirements
- Sensor Technology
- Infrared (NDIR) or Semiconductor
- Detection Range
- 0-2,000 ppm typical
- Response Time
- <30 seconds (T90)
- Calibration Frequency
- Semi-annual to annual
- A2L Classification
- LFL monitoring may be required
Related Applications
Industries and environments where R-1234ze detection is critical
Detection Solutions
Sensors and detectors for R-1234ze monitoring
cGas Detector VRF IR Refrigerant Transmitter
An aesthetic, non-dispersive infrared refrigerant gas detector for acute leak detection in modern energy-efficient buildings utilizing Variable Refrigerant Flow (VRF) HVAC systems.
cGas-SC Self-Contained Controller
A self contained controller with up to 3 gas channels, Plug & Play Smart Sensor Technology and configurable logic control and priority settings. Offers superior user customization and reliable gas detection performance for monitoring many gases.
cGas Detector IR Refrigerant Transmitter
Non-dispersive infrared refrigerant gas detector with accurate, low level leak detection, available with analog output or BACnet® or Modbus® output and Plug & Play Smart Sensor Technology.
FCS Multi Channel System Controllers
High performance controller with logic and priority settings for monitoring toxic, combustible and refrigerant gases with versatile control functionality. Available with Modbus® or BACnet® communication with BAS, supports 4-20 mA and Modbus® driven VFDs.
Related Gases
Other A2L Refrigerants we detect