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- Philips Experimental House Research 1974ff: Passive versus Active Measures in Europe & America
- nceivable in the context of its core in-house technology, such as solar collectors, heat pumps, heat recovery units and other innovative energy supply devices - i.e. mainly “active... Balcomb et al. 1977, Lovins 1977. Interestingly enough, efficiency strategies for electrically operated homes served as another initial input (cf. Stoy 1973 and Hörster 2007