NATE Low Global Warming Potential (GWP) Practice Test

A2L refrigerants are mildly flammable, so in a confined space vapors can accumulate quickly and create an ignition or explosion hazard. The safest approach combines ventilation, leak detection, and appropriate protective gear. Adequate ventilation helps dilute and carry away flammable vapors, reducing the chance that concentrations reach flammable limits. Continuous monitoring for leaks or vapor buildup with suitable detectors lets you detect and address issues before they become dangerous. PPE chosen for flammable refrigerants protects you from exposure and helps maintain a higher level of safety in case of a vapor release, and should be used in conjunction with other controls. Relying on general PPE or skipping precautions would not address the specific flammability risk, and making ventilation optional would leave vapors to accumulate.