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- Philips Experimental House Research 1974ff: Passive versus Active Measures in Europe & America
- , the small remaining energy demand could largely be covered by renewable energies (such as solar ther... Actually, **it became clear that houses could be run without conventional heating systems** so tha... vels typical for a Passive House - where they may be met with a single unitary heat pump device, i.e. ... tbau, bi : Bauwirtschaftliche Informationen, Ausgabe A, Nr.3, 1980, p. 38 – 40. * Lovins, A. (1977