the 63 mm diameter JANSEN powerwave corrugated pipe results in a larger heat-exchange pipe surface (0.22 m²/m), which allows considerably more energy to be absorbed from the ground. In parallel with this
costs and damages incurred due to delayed delivery or performance; to demand a contractual penalty of 0.5% of the net order value per week or part thereof, up to a maximum of 5% of the net order value. Payment