NA 005
DIN Standards Committee Building and Civil Engineering
Technical rule
[CURRENT]
VDI 4640 Blatt 1
VDI 4640 Blatt 1
Thermal use of the underground - Fundamentals, approvals, environmental aspects
Title (German)
Thermische Nutzung des Untergrunds - Grundlagen, Genehmigungen, Umweltaspekte