These sit in separate families on this site for a reason, and the difference is the mechanism, not just the price.
No compressor, no refrigerant
An evaporative cooler like the Cecotec EnergySilence 5000 draws air through a water-soaked pad; the water absorbing heat as it evaporates is what cools the air. There’s no refrigerant loop and no BTU rating, because it isn’t the same kind of appliance.
Climate decides which one works
In dry heat, evaporative cooling genuinely works and costs far less to run — Cecotec’s unit draws just 28 W against a compressor unit’s 1,000-plus watts. In humid air, the technology loses effectiveness fast, since the air can’t absorb much more moisture.
Running cost is not a close comparison
An evaporative cooler’s low-power DC motor is a fraction of what any compressor portable AC on this site draws. That’s the real appeal in the right climate — cheap to buy and cheap to run, provided the air is dry enough for it to work.
What we would not do
Recommend an evaporative cooler as a budget alternative to a real air conditioner in a humid climate. It isn’t a cheaper version of the same thing — it’s a different technology that simply doesn’t do the same job once humidity rises.
The questions that keep coming up
Will an evaporative cooler work in a humid climate?
Poorly. It cools by evaporating water into the air, which barely works once the surrounding air is already holding a lot of moisture — in a humid room it can make the air feel worse rather than better.
Last reviewed 24 August 2026