ᐅ Noticeable cooling effect with air-to-water heat pump

Created on: 19 Jun 2021 13:10
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_Ugeen_
Hello everyone,

We have been using the cooling function of our air-to-water heat pump for a few days now. At a perceived temperature of 38°C (100°F), we have 22-23°C (72-73°F) on the ground floor and 24-26°C (75-79°F) on the upper floor. I had hoped the cooling effect would be more noticeable.

On the upper floor, we have lowered all exterior roller shutters (made of aluminum). Downstairs, only where the sun shines through.

Are these good values or rather low? What are your experiences?
Mycraft19 Jun 2021 21:29
_Ugeen_ schrieb:

We were promised cooling of 6-8 degrees Celsius (43-46 degrees Fahrenheit).
Yes, maybe on the first day… but when the sun shines for several days in a row, that’s when the cooling stops and the heat returns.
_Ugeen_ schrieb:

I guess I will have to get a portable air conditioner for the really hot days after all.
Don’t do that. Get a proper fixed system instead. Install it at the highest point and enjoy comfortable temperatures.
S
Snowy36
19 Jun 2021 22:36
The mobile units are problematic mainly because they are so loud that you can’t run them at night….
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Bookstar
19 Jun 2021 22:58
Mycraft schrieb:

Yes, maybe on day 1… but the sun often shines for several days in a row… then it’s over and the heat sets in.

Don’t do that. Get a proper fixed system. Install it at the highest point and enjoy the comfortable temperatures.

What exactly does the “highest point” mean?
Mycraft19 Jun 2021 23:49
Upper floor / ceiling, preferably air space/stairwell
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_Ugeen_
20 Jun 2021 06:39
Mycraft schrieb:

Yes, maybe on day one… but the sun often shines for several days in a row… then it’s over and the heat sets in.

Don’t do that. Buy a proper fixed system. Install it at the highest point and enjoy the comfortable temperatures.


Regarding point 1: We were told something different here as well. We already used thicker insulation between the attic and the upper floor, even though they said it wasn’t necessarily needed. Probably nonsense again.

Regarding point 2: On the upper floor, the sloping roofs near the windows don’t really leave space for a fixed system. You need to position it close to the window, right? Do I need multiple outdoor units for several rooms?
Mycraft20 Jun 2021 08:44
Insulation certainly helps in both directions, meaning it keeps heat out. But—and this is a big but—insulation is also meant to retain the heat already inside the house. Otherwise, you might end up with a sauna effect without taking additional measures.

No, you don’t have to install the system near the windows. What’s more important is that the air can move freely, ideally in all directions. That’s why open floor plans are ideal.

The exact setup of the system needs to be worked out in detail. It’s also a matter of cost. Of course, you can have a separate indoor/outdoor unit for each room, but there are also multisplit systems where one outdoor unit serves multiple indoor units.