Financing / Equity / Granny Flat - Fundamental Thoughts

I am, however, an expert in innovative heating technology. In the future, the cooling load will be more decisive than the heating load. The Energy Saving Ordinance forces builders to implement massive insulation measures and controlled residential ventilation. This greatly reduces energy consumption for heating but, combined with large windows, results in a high cooling load. The houses heat up and the warmth is nicely stored inside. However, an air conditioner or reversible air heat pump operates on electricity. So the cooling compressor leads to very high energy consumption. At the same time, too much cooling of the building components carries the risk of condensation due to dropping below the dew point.

The combination of brine pump and cooling ceiling provides a) energy-efficient cooling (e.g. only a 40-watt pump runs, passive cooling via geothermal probes, no compressor cooling, no Carnot principle) and the cooling ceiling ensures better "heat transfer," so the building component temperature does not have to be lowered as much, meaning there is no risk of dropping below the dew point.

There are such houses as pilots from BayWa, built in Bavaria. Highly efficient, basically simple systems. The subsidy is of course also lucrative.