What is the normal voltage for a hot surface igniter?

The normal voltage for a hot surface igniter is 120 volts. Hot surface igniters are commonly used in gas furnaces to light the gas burner. When electricity is applied to the igniter, it heats up to a high temperature, creating a hot surface that can ignite the gas when it is released into the combustion chamber.

This ignition process is critical for the safe and efficient operation of gas appliances. The standard voltage of 120 volts ensures that the igniters achieve the necessary temperature quickly and reliably to facilitate combustion. In contrast, other voltage levels such as 240, 90, or 60 volts are not standard for these components, as they would not provide the optimal heating required for effective ignition in a gas furnace system. Therefore, understanding the appropriate voltage is essential for the correct installation and maintenance of gas furnace components.