When installing ember detectors, which of the following is not a required spacing consideration?

When installing ember detectors, not considering the flame size is acceptable because ember detection primarily focuses on the presence of embers that can ignite fires rather than the flames themselves. Ember detectors are designed to sense small particles that are carried by the wind, which are typically remnants of combustion that haven't yet ignited surrounding materials. The critical factors for placement involve understanding the environment where embers might be present, which includes the actual distance from the potential fire, the type of fuel present, and the size of the ember, as these can influence how far embers can travel and how effectively the detectors will function. By focusing on the properties that can lead to ember generation and travel, practitioners can ensure that early warning systems are effectively positioned to detect embers before they ignite a fire, making flame size irrelevant in this specific context.