Like the inner components and they are free of teflon. Outer casing is plastic.
My bad:"Safety
The EdenPURE/SunTWIN Heaters have an excellent safety record. They produce safe, clean, economical heat by using Infrared Quartz Elements. The unique EdenPURE/SunTWIN heaters use a process that virtually prevents wasteful accumulation of heat on the ceiling. These heaters deliver ultimate comfort by keeping the heat virtually even from "head-to-toe."
"Healthy Heat
EdenPURE/SunTWIN Heaters produce heat that is as safe as the infrared rays of the sun, producing natural outdoor heat indoors. The EdenPURE/SunTWIN Heaters have low operating and maintenance costs. The fan motor is the only moving part and is equipped with quality, trouble-free controls. There are no burners to rust, corrode, or adjust, and no pilot light to waste energy. Safe, clean, long-life infrared Heating Elements provide the heat energy. Average element life is 20,000 usage hours. The heaters are internally constructed of lifetime metals (Zincification metal plate and Bronze)."