ULRICH STIELER KUNSTSTOFFSERVICE E.K.
ULRICH STIELER KUNSTSTOFFSERVICE E.K. Patent applications | ||
Patent application number | Title | Published |
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20120193073 | DEVICE FOR BUILDING VENTILATION - The present invention relates to a device for building ventilation, having heat recapturing, wherein the heat of the room air that is fed outside is recaptured, and cold outside air being fed inside can be preheated by means of the recaptured heat. | 08-02-2012 |