Identification and classification of heat pump problems in the field and their implication for a user-centric problem recognition

Energy Informatics

Table 6 List of interviews

No	Interview partner	Date	Topics	Interview length
I1	Energy consultant A	01.12.2021	Joint on-site heat pump inspection of a ground source heat pump, pre- and debriefing	90 + min
I2	Energy consultant B	07.12.2021	Joint on-site heat pump inspection of an air-source heat pump, pre- and debriefing	90 + min
I3	Energy consultant B	13.12.2021	Presentation, validation, and improvement of the classification scheme for heat pump problems and the found problems Application of the classification scheme	144 min
I4	Energy consultant A	13.12.2021	Presentation, validation, and improvement of the classification scheme for heat pump problems and the found problems Application of the classification scheme	186 min
I5	Energy consultant A	15.12.2021	Application of the classification scheme (continued)	105 min
I6	Energy consultant B	17.12.2022	Application of the classification scheme (continued)	79 min
I7	Energy consultant B	17.12.2022	Application of the classification scheme (continued)	108 min