Les niveaux sonores peuvent varier d'un modèle à l'autre, et il est important de choisir un appareil dont le niveau sonore est tolérable pour l'usage prévu, en particulier si le climatiseur est utilisé dans des chambres à coucher ou d'autres endroits calmes. Recherchez les modèles qui fonctionnent avec un faible niveau de décibels ou qui intègrent des technologies de réduction du bruit.

Portable air conditioners are usually labelled with an energy efficiency rating that indicates their energy saving capabilities and helps users make informed choices about their efficiency. In Europe, the energy efficiency of portable air conditioners is usually indicated by the European Energy Efficiency Certificate. This certificate uses a scale from A+++ (most efficient) to D (least efficient). Countries such as the United States and Australia use their own energy labelling systems, such as the Energy Star rating and the Energy Rating Label respectively. Choosing models with higher energy efficiency ratings can help minimise electricity costs and reduce the environmental impact of their use.