1.1. Monitoring systems

The space heating demand, the hot water consumption, the heat loss of the circulation pipe, the natural gas consumption and the electricity consumption of the natural gas boiler and the heating system were measured in periods before and after installation of the solar heating system. Further, the heat transferred from the natural gas boiler to the hot water tank was measured before installation of the solar heating system. Furthermore, the heat produced by the solar collectors, the heat produced by the boiler, and the electricity consumption of the solar heating system were measured in the period after installation of the solar heating system. The monitoring system is described in details in [5].

Based on the measurements it is possible to estimate the energy savings of the solar heating system.