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The Duo FR functions in all installation positions
Elektrotherme Elektroheizung – Wandheizkessel 12/24 kW
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The device is CE marked
pellet or combination boilers
zugbegrenzer z4 130 x 190 mm kombikessel The Duo FR functions inTrain limiter Z4 130 x 190 mm The Upmann Z4 draft regulator is approved for use with oil, gas, and all solid fuels, whether in new installations, renovations, or all conventional systems. These systems require a specific and constant negative pressure for operation. If the chimney draft exceeds the value for optimal draft, the damper of the chimney draft regulator opens, reducing the negative pressure by allowing additional air to flow in. Once the
