Used as a preheater to preheat fresh air; to be installed in ducts on fresh air inlet.
Used as an afterheater to reheat supply air; to be installed in ducts after the unit.
Integrated PTC (Positive Temperature Coefficient) heating elements.
Housing includes a terminal board and internal wiring.
Includes two protection thermostats - a reversible one and a safety irreversible one.
Contains an interference-free SSR relay as standard.
Perforated metal filter to protect heater from gross particles (easily cleanable).
Galvanized sheet metal housing.