Accommodation bureaux (hotels, boarding houses); Hospitality services (accommodation); Accommodation reservation services; Booking services for accommodation; Inn keeping (bar, restaurant and accommodation); Providing information, including online, about services for providing food and drink, and temporary accommodation; Provision of temporary accommodation; Reception services for temporary accommodation (management of arrivals and departures); Rental of holiday accommodation; Arranging hotel accommodation; Rental of chairs, tables, table linen, glassware; Rental of meeting rooms; Restaurant services; Restaurant reservation services; Snack bars (provision of food and drink); Bar services; Coffee bar and coffee house services (provision of food and drink); Cocktail lounge services; Club services for the provision of food and drink; Food and drink catering

Engineering services in the field of heat exchanger construction; development of manufacturing processes in the field of heat exchanger construction; quality testing services of manufacturing plants for heat exchangers, in particular industrial manufacturing operations for heat exchangers for certification purposes; renting and providing computer programmes and software for heat exchanger technology by means of data carriers, namely programmes, software and applications for computers and personal computers; analysis, quality assessment and quality improvement of heat exchangers and heat exchanger systems.

Publication of technical information for heat exchangers and heat exchanger technology; publication of standardisation information and teaching materials on heat exchangers and heat exchange technology; publication of safety-related documents and data sheets on heat exchangers and on heat exchange technology; training and continuing education in relation to heat exchangers and heat exchange technology.