Refrigator and heat pump equipment: Check-ups and performance data inferred from measurements under field conditions In the refrigerant system (NT VVS 116)

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  • Report #: NT VVS 116
  • Approved: May 1997
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The scope of this Nordtest method is to provide instructions and recommendations regarding onsite performance checkups of heat pumps and refrigeration equipment.

The method describes the way in which the performance of heat pump and refrigeration equipment is to be inferred by means of measurements in the refrigerant system and the performance compared with data provided by the manufacturer or supplier of the equipment.

The objective of the method is to keep the uncertainty of measurement of the coefficient of performance below ±15 %.


Nordtest is a trademark of Nordic cooperation in conformity assessment. The emphasis of Nordtest is to develop, promote and innovate Nordic test methods and pre-normative activity. Nordtest endeavours to remove technical barriers to trade and promotes the concept: “Approved once, accepted everywhere”.