“To reduce the risk of carbon monoxide poisoning, some new generators feature a built-in sensor that triggers an automatic shutoff if CO gas builds up to dangerous levels in an enclosed space, like a garage or carport. And some portable models are now designed to emit less CO in the first place.”

https://www.news4jax.com/money/2021/05/27/shopping-for-generator-ahead-of-hurricane-season-look-for-key-safety-feature-experts-say/?__vfz=medium%3Dsharebar&fbclid=IwAR1K-XqBoyTdxuZE7duZOgsiuCpQbthQIzxdRCz7Aber_MdhfZghqxx1hN8