KRU – sealed regulating and shut-off damper.KRU-25 – sealed regulating and shut-off damper with thermally insulated blades, the measured thermal transmittance Ud = 2,5 W/(m2K).KRU-23 – sealed regulating and shut-off damper with thermally insulated blades and an thermally insulated external casing, the measured thermal transmittance Ud=2,3 W/(m2K).
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