KfW energy calculation with cooling heat pump

If you want to cool properly, you need an air conditioner

To effectively cool with controlled residential ventilation, a preceding cooling coil is more or less ineffective if the rest of the system remains as the usual controlled residential ventilation is built. The geothermal heat exchanger causes more problems than it solves. Likewise, cooling via underfloor heating is no more than a drop in the ocean; it lowers the temperature by a few degrees and creates a slightly cooler floor... but where cooler air is desired, that is, about 1m above the finished floor, the air remains more or less unchanged. The mentioned dehumidification is only marginal and the circulation too low.

Sure, here a little, there a little, and with automated shading and other measures, one can cool a house down enough to make it comfortable.

If you really want to cool effectively to 22-23°C, then you should consider air conditioning, and the 200-300 euros annual operating costs should not really discourage you.

If you really want to cool down effectively to 22-23°C, you should consider air conditioning and the 200-300 euro operating costs per year shouldn't really deter you.

Another reason to install a photovoltaic system on the roof. This way you can use the electricity very well in the height of summer.

Thank you very much for your assessments! Since we already have an 8 kWp photovoltaic system, we can also use an air conditioning unit in midsummer and power it with the photovoltaic electricity.

Many thanks for your assessments! Since we already have an 8 kWp photovoltaic system, we can also use an air conditioner in the height of summer and power it with the photovoltaic electricity.

Always as much photovoltaic on the roof as possible! The electricity demand will tend to rise in the coming years (electric cars + global warming and resulting costs for air conditioning, etc.) and not decrease.

Another reason to install a photovoltaic system on the roof. This way you can use the electricity very well in high summer.

Even better: the photovoltaic system protects the roof from overheating, as the solar radiation does not even reach the roof tiles. And windows can be shaded in other ways (roof overhang, clever placement, building recesses, etc.) or, if necessary, protected as needed with venetian blinds.