Elstein HFS panel heaters are ceramic infrared heaters, which are designed for medium surface ratings up to 38.4 kW/ m² and operating temperatures up to 700 °C. HFS Series heaters are made using a hollow casting ceramic process. Compared to ceramic IR heaters produced using the full-pour casting process, HFS heaters have a considerably shorter heat-up time. This technology was successfully used first for HFS heaters and then further developed for subsequent models. HFS panel heaters are available in four designs and cover the power range from 60 W to 600 W. Elstein HFS panel heaters have customary market dimensions and can therefore be replaced with heaters with the relevant properties if the requirements change.