The Laars Heating Systems R0457500 Pool Heater Hot Surface Igniter (HSI) is designed to enhance the performance and reliability of pool heating systems. Operating at 120V, this igniter is crucial for initiating the combustion process in pool heaters, ensuring a smooth and efficient start-up. The HSI works by using a heated element to ignite the fuel, facilitating the safe and reliable... https://www.usapoolshop.com/r0457500-laars-heating-systems-pool-heater-hsi