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- Special features and characteristics of components in contact with the ground
- owards the ground ; Protocol Volume No. 48 of the Research Group for Cost-effective Passive Houses, 1st Edit... also be justified (except in the case of large or research projects). Frequently, the Ψ-values calculated in... rough the ground**; Protocol Volume No. 27 of the Research Group for Cost-effective Passive Houses, \\ 1st E