What is the main difference between an intermittent pilot light and a hot surface igniter?

• A. Intermittent pilot requires flame; hot surface igniter does not
• B. Hot surface igniter is more fuel-efficient
• C. Intermittent pilot lights continuously while igniter does not
• D. Hot surface igniter uses compressed air

Answer: (A)

The key distinction between an intermittent pilot light and a hot surface igniter is that the intermittent pilot light requires an actual flame to ignite the gas, whereas the hot surface igniter does not utilize a flame but instead relies on a glowing surface to ignite gas.

In appliances featuring an intermittent pilot light, this method allows for the pilot to remain off until needed, at which point it ignites the gas through a small flame. This can be advantageous for efficiency, as it reduces gas consumption when the appliance is not in use.

In contrast, the hot surface igniter heats up to a high temperature until it glows, at which point it ignites the gas without the need for a flame. This technology often results in a more reliable and safer operation, as it reduces the risk of lingering flames or pilot outages.

The other options don't accurately capture the fundamental difference in operation between these two ignition systems. For instance, while it's true that hot surface igniters can be more efficient in terms of gas usage, that's not the main distinguishing feature. Similarly, while there are differences in how long each system operates, stating that the intermittent pilot lights continuously isn’t a complete picture, as that can vary based on system design. Lastly, hot surface igniters do