How To Buy the Best Dehumidifier

Whether you’re looking for the best dehumidifier to tackle condensation, damp or mold, we’ll help you buy the best dehumidifier for you.

Have you begun to notice water staining on walls or ceilings, condensation developing on your windows, or mold lurking in the shower? Then it’s time to invest in a dehumidifier. If you’re wondering whether to run a dehumidifier alongside air conditioning, there are a couple of reasons as to why this is a good idea. First of all, the dehumidifier will help take some of the work load off the air conditioning, which will save wear and tear on your AC unit. You may also find that you’ll be able to use your AC less than normal. That’s because the lower humidity level helps you to feel more comfortable even when the temperature is high.

We’ve put together our guide to help you know whether you’ll need a refrigerant (compressor) or desiccant dehumidifier along with the features to look out for.

How Can I Buy the Best Dehumidifier for My Home?

When you’re browsing for a dehumidifier, you’ll find that there are two main types, refrigerant, and desiccant. Each one has its own way of dealing with humidity problems. Do also remember that each one also has both advantages and disadvantages.

Refrigerant Dehumidifiers

Refrigerant dehumidifiers work by causing the damp air to come into contact with a cold surface. When this happens, condensation forms. This then forms water droplets which collects in a water tank. Generally, this type of dehumidifier works best in heated rooms. That’s because when the temperature drops too low, then the coils inside the humidifier can begin to freeze. Generally, the area needs to at least 65°F/18°C for a refrigerant dehumidifier to work effectively. You can buy refrigerant humidifiers that do work in colder conditions, but do be aware that their cost does tend to be much higher.

Desiccant Dehumidifiers

Desiccant dehumidifiers use an absorbent material which acts like a sponge to pull the water out of the air. The desiccant is then regenerated through a heater within the dehumidifier, so the moisture drips into a holding tank. Then it can then go back to work, capturing more water in the air.

Desiccant dehumidifiers can work effectively in temperatures of 15°C or less. This means that they are most suitable for use in garages and outbuildings. Do be aware though that desiccant dehumidifiers are power-hungry.  So, you should expect to see an increase in your electricity bill when using one. There are also some reports of them being more unreliable compared to refrigerant styles. That said, we see lots of feedback from very pleased clients with no hint of problems.

What Size of Dehumidifier Do I Need?

A dehumidifier’s size is measured by the number of liters of water that it can extract from the air on a daily basis. So, that means that you need to consider the size of the space that you need to dry out. Some dehumidifiers are designed for whole-house use. However, that would be a crazy expense and power usage if you only have damp problems in the bathroom.

Check out the specification on each model to understand the room size that it was designed to cope with. We would suggest erring on the side of slightly larger room capacity. That’s because the last thing you want to do is to buy the best dehumidifier on the market but then find it can’t cope with the issues you’re having.

What Features do Dehumidifiers Have?

Here are some of the key features you should look out for when you’re shopping for a dehumidifier. 

Continuous Drain Facility

Many dehumidifiers will allow you to connect a hose and then flush away all the collected water directly into a low-level drain. This means that you won’t need to empty the tank yourself. Additionally, there is no risk of it switching off when it’s full. Not all rooms have a suitable drainage point though, so do consider this in advance. Also, be aware that even those with the functionality rarely come with the hose, which you will need to buy separately.

Auto setting or in-built humidistat

This setting ensures that the dehumidifier switches on when the moisture levels in the air reach a pre-defined level. This means that you don’t need to keep switching it on and off or guess when it’s needed. This is a handy feature to have when you’re trying to keep your electricity bills down.

 In most buildings, you should aim for a relative humidity level (RHL) of around 30-50%. This keeps the space comfortable and prevents bacteria and mold growth. Most dehumidifiers have what’s called a humidistat, which will let you program in your required RHL.

Integrated cord storage

When space is at a premium, then being able to safely tuck away the cable is essential. No more tripping over cables or having them chewed by puppies!


The timer allows you to program the dehumidifier to switch on or off after a certain amount of time. This can be really useful if you have an electricity tariff which providers cheaper power at certain times of the day, It also means that you won’t forget to turn it off!

Laundry setting

Do you often have to hang clothes inside because its wet outside or you don’t have access to outside space?  A dehumidifier can also help you to dry your laundry. Some units come with a special laundry setting, but actually, you can use any dehumidifier for this. While hanging clothes on a radiator, just cause more condensation, a dehumidifier is said to leave clothes softer compared to using a tumble dryer as no heat has been used