Introducing the Infratech E2428SL (10-7040) 2400 Watt Replacement Quartz Element For SL2428 Only - Clear Color. Replacement Quartz Element For Infratech SL2428 - 208V. Infratech electric infrared heaters are designed to breathe new life into your outdoor patio. Boasting outstanding performance and durability, Infratech uses medium wave infrared heat to produce a pleasing glow with no glare or obnoxious light. These American-made heaters are fashioned out of recyclable materials and operate with zero greenhouse emissions, odors, or ultraviolet light. Designed for up to 5000 hours of use this is the replacement quartz element for Infratech SL2428 Model.