Dehumidifier Buying Guide

The Complete Dehumidifier Buying Guide - Aircon Centre

We all require optimal, healthy levels of moisture in our homes and office spaces. Too much moisture in the air will typically cause condensation on windows and damp.

Excess water vapour can also permeate through walls, furnishings and clothes - creating expensive damage associated with mould, rot and peeling wallpaper and paint.
Harmful dust mites thrive in high humidity. As do some bacteria.

Ideal moisture levels are around 45%. Much over 60% and you may benefit from the use of a dehumidifier to create a comfortable and safe environment.

Unit Featured: Meaco 25L Low Energy Dehumidryer

Choosing the Right Dehumidifier

The first thing to think about when buying a dehumidifiers the size of the space where you want to reduce humidity:

To help you, we’ve conveniently organised our dehumidifiers in to Categories:

Dehumidifiers for a wide range of environments:

  • Swimming Pool Dehumidifiers
  • Home Dehumidifiers
  • Commercial Dehumidifiers
  • Boat & Caravan Dehumidifiers
This is a great starting point. However, the capacity of a dehumidifier denotes the amount of moisture it can extract from your environment in a 24 hour period.

Small homes and flats will usually require a capacity of between eight and 12 litres. A larger family home with up to four bedrooms will require a capacity of up to 16 litres. Twenty litre dehumidifiers will cope with the largest homes and reasonable-sized environments such as large garages and outbuildings.

Owners of small offices and commercial premises often choose a robust domestic dehumidifier. These work well unless you are drying out a very wet area or using the dehumidifier for specialist applications, such as drying wet plaster or rectifying flood damage.

Other things to consider when buying a dehumidifier:

Product Size
  • Assess whether you want the dehumidifier to be portable and, if so, whether you can lift it comfortably.

Tank size
  • This will influence the amount of water that can be removed every day. Very large or very moist environments will require a larger tank.
  • Also, think about how often you will need to empty the tank. Many dehumidifiers will have options for continuous drainage, meaning that there is no need to worry about emptying tanks.

  • This enables you to set a desired humidity level and the dehumidifier only operates when it is needed - saving you money.

  • Be sure to evaluate the energy efficiency of your dehumidifier.
  • Old dehumidifiers can be expensive to run and upgrading to one of our new models could actually save you money through reducing your energy bills. Energy saving features to look for include: coated coils (which make the water extraction faster), rotary compressors and intelligent control systems.

Bacterial Filters
  • Many dehumidifiers offer bacterial filters. Consider this option when your dehumidifier will be sued in an environment where the health of children, allergy sufferers, or the elderly is important

  • Consider where you will be using the dehumidifier. In a sitting room or bedroom a quiet dehumidifier will be preferable.

At we list these key facts on each of our products - so you can make the most informed purchasing decisions. If you would like further assistance, our friendly technical customer service advisers will be happy to help. Please call them free on 0800 865 4567..

Our consumer champion says:

“Look at the Key Facts attached to every dehumidifier we sell. This will help you make the best decision about which dehumidifier is right for you.”


What's the Difference Between Desiccant Dehumidifiers and Compressor Dehumidifiers?

Compressor dehumidifiers
Compressor dehumidifiers work by drawing air from the
room across a filter and into contact with a cold metal surface made up of
hundreds of fins.

As the surface is cold the excess moisture present in the air will condense and water droplets will be seen on the metal fins. These droplets will slide down the metal plates and collect in the dehumidifier’s internal water collector.

All of this warming and cooling of the coils is controlled by a compressor that warms and cools refrigerant that cycles through the pipes.

Desiccant Dehumidifiers
Desiccant Dehumidifiers were once used only in commercial applications, but are now also available for home environments.

The desiccant is a type of gel called zeolite. Moist air is drawn over a filter and into the zeolite desiccant which is housed in a wheel that rotates slowly. The desiccant absorbs the excess moisture from the air.

At the bottom of the wheel’s rotation are a small heater and a second fan. This regeneration fan uses the warmth from the heater to dry the wheel making it ready to absorb
moisture again. The now warm, damp air hits a metal plate which causes condensation to form and the water then drips down into a collecting tray and from there drains into an internal container.

Whereas a compressor dehumidifier warms the room air by 1-2°C, the air exiting a desiccant dehumidifier will be about 10-12°C warmer than the air it draws in. This makes
desiccant dehumidifiers very useful for warming up spaces like cold hallways.

Typical uses include flats and apartment where the low noise level and the ability to dry washing is popular and low temperature applications over winter, for example keeping a boat, caravan, bike, car or holiday home dry whilst not in use.

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At, we pride ourselves on providing a quality range of dehumidifiers that from the best manufacturers at only the best prices. If you're unsure as to which Dehumidifier is right for you, you can use our LiveChat to speak to an expert, or if you prefer to speak to someone, our dedicated Customer Services team are on hand to assist. Call us on 0800 865 4567