Which statement is true about pulse combustion furnaces?

Pulse combustion furnaces are known for their ability to operate at a high efficiency range. This type of furnace utilizes a unique combustion process that enhances heat transfer and minimizes energy losses, resulting in better fuel utilization compared to traditional combustion methods. The high efficiency is achieved through the rapid oscillation of combustion gases, which promotes complete combustion and efficient heat transfer to the environment.

In contrast, other options suggest drawbacks or misconceptions about pulse combustion furnaces. They are generally designed for efficiency, often requiring less frequent maintenance compared to conventional furnaces, contradicting the idea that they require constant maintenance. Similarly, pulse combustion furnaces are typically more efficient rather than less efficient than traditional models, which counters the option stating they are less efficient. Finally, these furnaces can be effectively used in various applications, including larger spaces, making the assertion that they are unsuitable for large areas inaccurate. Therefore, the statement about their high efficiency accurately captures a key advantage of pulse combustion furnaces.