What defines a Low Heat Appliance?

A low heat appliance is defined as one that operates with combustion temperatures under 1000 degrees Fahrenheit. This definition is important as it categorizes appliances based on their combustion process and temperature, which influences both safety considerations and the type of venting required. Appliances that maintain combustion temperatures within this range tend to have specific design and installation requirements, particularly concerning how they handle exhaust and ensure safety.

On the other hand, while the option mentioning combustion temperatures under 800 degrees might seem reasonable, it does not encompass the full range considered for low heat appliances, which extends up to 1000 degrees. The other choices are not relevant to the temperature definitions used for classifying low heat appliances; they focus on fuel types or energy sources rather than the critical metric of combustion temperature.