facebook What is the Difference Between a Dehumidifier and an...

What is the Difference Between a Dehumidifier and an Air Purifier?

It’s quite easy to get dehumidifiers and air-purifiers confused. While they may look similar externally and both do suck stuff out of the air, they really have two completely distinct functions. They’re not a small investment either and so it’s very important that you get the right machine for what you need. Get the wrong one and while it may look good, you’ll have wasted your money because it won’t be fulfilling the task you bought it for. As well as being quite a few quid lighter in your pocket, you’ll also still be stuck with the original problem.

Read on to find out the basic differences between a dehumidifier and an air-purifier and how they do the job they do.

LEARN MORE: You can read more about air purifiers and the best sellers in our guide here and dehumidifiers in our guide here.

So which one does what?


Dismantle the word dehumidifier and you’ll find the answer to this machine’s purpose. Yes, the keyword is – humid. If you have a damp problem in your home then this is the device you should be considering purchasing.

Surprisingly, the atmosphere holds a lot more moisture than we actually give it credit for and some geographical locations are more problematic than others. Sometimes damp can be so bad, you can even end up having a home that smells like a pair of smelly football socks which haven’t been changed all season. That humidity in the air, although it’s invisible, can cause not only damage to your home, but to your health too.

Dehumidifiers are also a good solution if you have a glass conservatory or bathroom which suffers from condensation. If you’ve found mould and mildew are sprouting in certain poorly ventilated corners of your house, then checking out dehumidifiers means you’re on the right track to curing the problem.

How does a dehumidifier work

Think of a dehumidifier as a technologically driven sponge. It’s been manufactured specifically to remove as much moisture from the air as possible. Once you’ve got it switched on, believe it or not, it won’t work unless you do, it’ll begin to draw air in through strategically placed vents. Vent sizes vary with different machine designs so don’t expect them all to look the same.

The air circulates inside the dehumidifier and passes over an ice cold metal grill which is similar to the internal workings of a fridge. The coldness turns the moisture in the air back into water which subsequently drips down into a catchment container. The dehumidified air is then expelled out of the machine through a different vent and back into the atmosphere of the room where you’ve placed it. Sounds pretty simple really, doesn’t it? But as you might be able to imagine, dehumidifying is an ongoing process and it isn’t going to happen in five minutes.

Most dehumidifiers are capable of measuring the level of humidity in the air automatically and aim to hit a target range of between forty to sixty percent. So if your damp problem is serious, be patient. You’re going to have a lot of water to empty from the container of your dehumidifier, but it’ll be worth it in the end. Most dehumidifiers will switch off automatically when the water collection container is full. That means you’re able to leave them running when you’re away from home and won’t have to worry about returning to find the house flooded.