Reliable ignition is the top priority for design engineers developing gas appliances, and is of utmost concern for other functions such as marketing, sales, quality assurance, and field service. Until recently, the designers of gas appliances had to choose between two on-demand ignition technologies: spark and hot surface. Now there is a third choice, a system that utilizes a low-voltage, resistive-wire coil that can be adapted to different burner systems. This adaptable technology has emerged as a strong alternative for designers seeking a higher level of ignition reliability.