It is normal for a portable air conditioner to make a bit of noise whilst it is in use, however, the noise may sound louder depending on the type of room you are in or your hearing sensitivity.
Sounds are also naturally perceived as louder at night because there is no background or environmental noise interference.
The noise is due to the fact that the unit has a compressor inside, whereas, in the case of a permanent split system unit, this compressor would be located outside.
As per the product's specifications, your portable air conditioner should not exceed noise levels of roughly 55-65dB, depending on the unit.
This reading is measured 2m from the unit in a testing laboratory environment.
This is a fairly standard range of noise for an air conditioning unit and as a comparison, a typical shower or flushing toilet will be at around 70-75dB.
Whilst the noise produced from a portable air conditioner can be an inconvenience, it is important to note that it is normal for this to occur and it will occur to some degree with all air conditioners.
Please contact our Support Team via your Kogan.com account if you have any questions or conerns.