Mitsubishi Heavy Industries' S series outdoor units are larger than other series, but they are quieter, more durable, and more resistant to breakage. Even if you place the indoor unit on the second floor, it would be better to place the outdoor unit on a concrete block on the first floor on a sturdy and hard ground, not on the second floor or above. Comment: This model does not have a ventilation function, but if possible, I would like you to develop and market a model with a ventilation function for both intake and exhaust air as soon as possible. Masahiro Ishizuka, CEO of Aon.

https://review.kakaku.com/review/K0001342618/ReviewCD=1607236/#tab

Reference example.

Beaver air conditioner SRK2221S

hukuikohama

Air conditioner with a quiet outdoor unit

This is for people who only want that one thing.

The larger the outdoor unit is, the quieter it becomes because of the fan speed and extra power of the compressor.

(I also own a T series air conditioner with a small outdoor unit, but its outdoor unit's compressor is several times louder.)

We were concerned about the noise of the outdoor unit installed on the balcony in our apartment, so we sought out and purchased a quieter air conditioner. I am satisfied with the quietest air conditioner I have ever purchased. The outdoor unit of this model is very large even though it is for 6 tatami mats, and it looks like the 200V specification for 23 tatami mats is being used at 100V with a limiter. The fan of the outdoor unit rotates slowly and makes almost no noise. It cools down quickly.

The weak point is that the temperature control of the indoor unit is very rough, and even if you specify a 1°C difference, the temperature only changes by about 2°C intervals. Good temperature control is difficult. The fan of the indoor unit does not circulate the air in the room when it is set to automatic, and there is a large bias. It is necessary to use it in combination with a circulator.