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- Philips Experimental House Research 1974ff: Passive versus Active Measures in Europe & America
- t pumps, heat recovery units and other innovative energy supply devices - i.e. mainly “active” components.... esearch were inspired by Scandinavian work on low energy houses, as well as American efforts on passive s... house is known for. Besides, the small remaining energy demand could largely be covered by renewable energies (such as solar thermal energy supplied by own experimental vacuum collectors an