Why modern wall A/Cs have the inlet air at the top « on: December 06, 2024, 09:01:52 AM » Author: dor123
Why in modern split wall air conditioners, the inlet air vent is at the top of the indoor unit like in the unit in the attachment? 90's wall split air conditioners, had the inlet air vent at the front of the indoor unit which was much better.
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	Re: Why modern wall A/Cs have the inlet air at the top « Reply #1 on: December 06, 2024, 09:56:33 AM » Author: rjluna2
Probably a design by the company
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	Re: Why modern wall A/Cs have the inlet air at the top « Reply #2 on: December 06, 2024, 10:02:28 AM » Author: dor123
But the problem with a top located inlet air vent is that the space between the top part of the indoor unit and the ceiling is limited to from few inchs/cm, and the top part is very prone to become dirty compared to the front part of the unit. With a front located inlet air vent, you can install the unit tightly on the ceiling, on areas that it hard to install the unit otherwise.
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	Re: Why modern wall A/Cs have the inlet air at the top « Reply #4 on: December 07, 2024, 01:02:24 AM » Author: dor123
Also: The air inlet grille are much harder to clean when it is at the top of the unit rather than at the front of it.
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Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

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	Re: Why modern wall A/Cs have the inlet air at the top « Reply #5 on: December 07, 2024, 01:36:27 AM » Author: Medved
The asthetic could be the prime reason, then the need to cram in larger surface condenser, so there is lower temperature drop betweent the air and the medium to improve efficiency, I would also guess the air filter screen in the top intake units would be placed horizontally, with the dirt lying on the top of it, so when manipulating with it (to clean the filter) it creates less mess. Regarding the dust I don't think there is any difference. Usually there is nothing on top of the ujit really generating any dust, all dust just comes with the air it is sucking in. And if it passes certain amount of air, it s going to accumulate corresponding amount of dust either way. Include the bottom intake drop ceiling units (there the dust just rains off down once you touch it when the fan is off).
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	Re: Why modern wall A/Cs have the inlet air at the top « Reply #6 on: December 07, 2024, 03:15:02 AM » Author: dor123
Here is an older wall A/C with a front air inlet vent: https://www.lighting-gallery.net/gallery/displayimage.php?pos=-117797 Older ones had multiple ones like this one: https://www.lighting-gallery.net/gallery/displayimage.php?pos=-195196 When the air inlet grille is at the top, it absorbs much more dust than when it is at the front, as the top part, being horizontal, always gets more dust than the front part, which is vertical. Also, being close to the ceiling, this contributes to the dust absorption.
« Last Edit: December 07, 2024, 03:24:52 AM by dor123 »		Logged

I"m don't speak English well, and rely on online translating to write in this site.
Please forgive me if my choice of my words looks like offensive, while that isn't my intention.

I only working with the international date format (dd.mm.yyyy).

I lives in Israel, which is a 220-240V, 50hz country.