ᐅ Air-to-Water Heat Pump: Current Consumption and Data

Zaba12 schrieb:

I like my house. Outside it’s going up to 30°C (86°F), but inside nothing is changing.
In the morning, I aired out the house to let the humidity normalize after what felt like six weeks of rainy weather. Even the mechanical ventilation system was overwhelmed in the past weeks.

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Let’s see how things go in the next few days.

What do you mean by that? What does “nothing is changing inside” mean exactly?

Bookstar schrieb:

What do you mean by that? What does it mean that nothing changes inside?

The temperature remains constant at 23°C (73°F), whether it’s 8°C (46°F) or 30°C (86°F) outside.

So without cross-ventilation at night, we have 23-25 degrees Celsius (73-77°F) during the day. Yesterday I had a window and the patio door open, and today it was a maximum of 20 degrees Celsius (68°F), but in the evening around 6 pm it was back to 23 degrees Celsius (73°F). Tonight, however, it is only supposed to cool down to 20 degrees Celsius (68°F), so I can’t get the heat out. But in the previous years it was worse without a sunshade.

For me personally, it will not be a prefabricated house anymore. It’s okay, but it can be done much better. If, then it would be a calcium silicate brick or concrete house.

Actually, prefab buildings are better in this regard due to their lower mass. There is less need to ventilate against heated thermal mass.

guckuck2 schrieb:

Actually, prefabricated houses are better in this respect due to their lower thermal mass. You ventilate less against heated building mass.

It really depends on the duration of the heatwave. For shorter heatwaves, solid masonry houses have a *major* advantage because they don’t heat up as much in the first place. For longer heatwaves, it’s more balanced and depends on how much heat you can ventilate out overnight. The days following the heatwave tend to be a bit warmer in solid houses until the building elements have cooled down again.

I’m so glad to be rid of the stress. I can just turn on the air conditioning and no longer have to deal with noise and pollen entering the house all night. The energy consumption is minimal (especially with photovoltaic panels), and the air is also dehumidified. Mainly because of this dehumidifying effect, I recommend a central air conditioning system to anyone building a new home (yes, even those with underfloor cooling).

And before anyone asks: I also ventilate thoroughly in the morning and keep the blinds closed from the outside during the day.