The decision for purchasing a heating system is a long-term one, as many different aspects have an influence on this choice. These different aspects were analyzed in a Germany-wide, written survey. The respondents (only owners of a private house) had to answer questions about their attitude towards e.g. economic, convenience or ecological aspects related to heating systems and the respective combustibles. Using a multinomial logistic regression model the choice of the heating system can mainly be explained by ecological attitudes and the assessment of different combustibles.