Traditional Refrigerants
R-434A
R125/R143a/R…R-434A is a zeotropic blend used as an R-22 replacement in water chillers and medium temperature refrigeration systems with improved efficiency characteristics.
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Key Information
Essential safety and exposure information for R-434A
Health Effects
Low toxicity. Contains small amount of flammable R-600a component. May cause cardiac sensitization.
Common Sources
- Water chillers
- medium temperature refrigeration
- commercial HVAC
Exposure Limits
- WEEL
- 1,000 ppm (8-hr TWA)
- No OSHA/NIOSH limit
- No OSHA/NIOSH limit
- Blend with R125/R143a
- Blend with R125/R143a
Regulatory Status
- EPA SNAP
- Acceptable substitute
- ASHRAE 34
- A1 Safety Classification
- GWP
- 3245
- ODP
- 0
- DOT
- Class 2.2 Non-flammable, UN3163
- F-Gas Regulation
- Phase-down applies
Detection Requirements
- Sensor Technology
- Infrared (NDIR)
- Detection Range
- 0-1,000 ppm (typical)
- Response Time
- <60 seconds (T90)
- Cross-Sensitivity
- Test for blend-specific response
- Calibration
- Annual with target gas recommended
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