ᐅ Is an air conditioning system necessary for a south-facing slope location?

Created on: 4 Mar 2020 12:12
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Guido1980
Is an air conditioning system necessary for the attic with a roof pitch of 35 degrees facing south, featuring two roof windows and a dormer on the south side? The rooms on the south side, arranged from west to east, are an office, a children's room, and a bedroom.

Opinions vary widely on this. A heat pump with cooling function and a mechanical ventilation system with heat recovery will be installed.

At the moment, the plan is to at least equip the south-facing rooms in the attic and possibly also the ground floor (living/dining area) with air conditioning.
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Deliverer
16 Jul 2020 08:47
Photos would be great!
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cschiko
16 Jul 2020 08:55
I will provide everything once it’s completed! Or at least a few initial pictures. One shows the access to the chimney flue used for distribution, then the bedroom with access from the attic (here a condensate pump was unavoidable), and the other picture shows the children’s room (95% of the cable duct is hidden behind the wardrobe):

White interior wall with air conditioning unit mounted on the right; brown square behind painter’s tape on the left.


Open indoor unit of an air conditioning system with electronics, copper pipes, and cables on the wall.


Basement wall with a hole in the concrete surface; white flexible hose runs through the opening, construction debris nearby.


Exposed cables in a dusty wall opening between brick and wood; insulation on the left, red interior section visible.
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cschiko
16 Jul 2020 09:12
Unfortunately, I can no longer make changes, but the work is really very neat and limits the “damage” or openings to a minimum. I’m really curious about the outdoor unit, which is supposed to go on the roof today. Through the skylight and then onto a bracket.

In the living room, it looks similar to the kids’ room, so we’ll have to come up with something to possibly “hide” the cable conduit there. We could have installed the indoor unit directly on the chimney flues there, but that would have meant worse air distribution, and for me, function simply takes priority. Still, you can get creative and maybe make it disappear with an eye-catching design; let’s see — for now, we’re still missing the right idea. It’s installed at about 2.50 m (8 feet 2 inches), so having a cabinet there is no longer an option.

It’s an old building from 1900, but it has been owned by my wife’s family ever since!
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cschiko
17 Jul 2020 11:05
Brief update:

The indoor units are mostly installed, and the condensate pump in the basement is done as well. Yesterday, due to the weather, it was not possible to access the roof, so there were two options. The first was to complete the remaining installation and commissioning today (which the supervisor/foreman has to do personally) or to do everything on Monday, as he has an appointment today. We agreed on the plan to finish everything on Monday.

The work continues to be very clean, and he was the one who immediately pointed out that the replacement of the cable ducts will of course not be charged to us. He had tried 7cm x 7cm (2.8 inches x 2.8 inches) cable ducts, but these did not fit with the supply and return lines, control cables, condensate, and power cables. However, the extra effort will not be billed either, which should have been obvious but is still reassuring that he mentioned it himself right away.
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cschiko
21 Jul 2020 10:27
The outdoor unit is installed and the system is running; the only thing left to do is the condensate drain. There was a minor "issue" because a part was missing due to a misunderstanding. However, this will be addressed soon, and then the commissioning and briefing will take place. They had to carry everything up to the roof, but everything looks clean and tidy:

Daikin multi-inverter air conditioning unit with large fan installed in the hallway on Styrofoam blocks.

Outdoor air conditioning unit on a sloped tiled roof next to a chimney; blue sky.


Unfortunately, there was a small "accident." They worked very carefully, neatly, and with great caution to avoid any damage. However, during drilling a hole in the support brackets, the drill bit broke off and passed over the roof towards the patio cover:

Small spider with eight legs sitting on the window glass against a grey cloudy sky.


The apprentice immediately came to inform me and checked the situation together with me. The issue will be covered by insurance and resolved. So, everything is fine!

Regarding the somewhat longer duration of the work, which is to be expected when renovating an old building and working carefully, it was communicated upfront that a mutual agreement will surely be reached. Overall, we are satisfied, and the initial short tests were promising. The first indoor unit can already be controlled via smartphone. The rest still needs to be integrated, and I will also check again to connect it to the home Wi-Fi via WPS.
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cschiko
6 Aug 2020 09:38
So, here’s some feedback now that the first hot days have arrived and more are expected. The system is running very well; even with outdoor temperatures of 30°C (86°F) and the outdoor unit reporting up to 37°C (99°F), it can maintain an indoor temperature of 20°C (68°F) without running at full capacity, and if desired, even 18°C (64°F). On the hottest day so far, we tested how it works on the ground floor with the doors open, and as expected, the ground floor also benefits significantly. The indoor units mostly run in automatic mode and seem to rarely go above level 2 or 3 out of 5 (plus there is a Power function available).

In the quiet mode for the indoor units at night, they are almost inaudible, so we let them switch back on at a certain time during the night (in the bedroom). We remain very happy with the system; it was the right decision. We will also arrange a maintenance contract, and to make things easier, we will include the heating system in it as well.

The only minor "drawback," which is just a matter of testing, is that the app and the remote control settings sometimes interfere with each other. I still need to figure out the exact cause. Sometimes the timer in the app doesn’t work, but this seems to be because the unit wasn’t properly turned off with the remote control. So this is simply a matter of getting used to it.
Oh, and we need to check the condensate pump in the bedroom again, as it makes some noise. I suspect it’s likely “vibrations” amplified by the cable duct. We’ll see!