Los niveles de ruido pueden variar entre modelos, y es importante elegir una unidad con un nivel de ruido tolerable para el uso previsto, especialmente si el aire acondicionado se va a utilizar en dormitorios u otras zonas tranquilas. Busca modelos que funcionen con bajos decibelios o que incluyan tecnologías de reducción del ruido.

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.