Which appliances should be turned on when searching for carbon monoxide leaks?

When searching for carbon monoxide leaks, the appropriate appliances to have turned on are thermostats, gas ovens, and hot water systems. These appliances are significant because they typically use combustion processes that can produce carbon monoxide as a byproduct.

Having these appliances operating creates scenarios where carbon monoxide might be generated or released. For effective detection and mitigation of leaks, it is crucial to monitor the environment around these appliances.

In contrast, air conditioning units, ovens (in general), and refrigerators do not play a direct role in the detection of carbon monoxide leaks as they either do not produce carbon monoxide or are not relevant to typical residential scenarios where carbon monoxide would be a concern. Thus, focusing on those appliances that engage in combustion helps ensure a thorough search for potential sources of carbon monoxide exposure.