Choosing the right portable AC: what actually matters

Not every portable air conditioner is equal. Before you chase a restock, it is worth knowing which specifications actually change your comfort.

Cooling power for your room size

Match the cooling capacity to your room's floor area and sun exposure. An undersized unit runs constantly and never quite cools; an oversized one wastes energy.

Noise you can live with

For a bedroom, look closely at the night-mode noise figure. A few decibels make the difference between sleeping through and lying awake.

Installation and running cost

Split-style portable units that need no wall drilling are the most popular for a reason. Check the energy label and estimate the seasonal running cost, not just the sticker price.