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Which Dehumidifier Should I Buy?

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Which Dehumidifier Should I purchase?

There is often confusion over which dehumidifier people need for their homes, as one the UK’s leading experts we regularly receive calls asking for advice on dehumidifiers, which dehumidifier you should select depends of factors such as size of area, what the temperature is and what is the purpose of the dehumidifier?

The two main uses for dehumidifiers in the UK are to solve condensation problem in homes and for drying washing, condensation often occurs in homes in the winter, usually forming on cold north facing walls condensation can occur when the humidity level is above 60%rH, this condensation can be a breeding ground for mildew and mould, often resulting in black mould spots forming on walls and in closets which is damaging to health. Dehumidifiers reduce the relative humidity to a level below 60% rH where condensation cannot form, in winter it is impossible to dry clothes outside and the cost of running a tumble dryer is excessive, dehumidifiers can dry clothes in an enclosed space quickly and efficiently.

There are two main types of dehumidifier you could purchase, these are refrigerant or desiccant:

Refrigerant dehumidifiers 

Refrigerant dehumidifiers such as Meaco or the Ebac range are very effective when used in homes which are normally heated, they are quiet and energy efficient.

Desiccant dehumidifiers

Desiccant dehumidifiers such as the DD8L can be used in heated homes but are also better in colder areas as they extract the same amount of water regardless of temperature, the refrigerant units performance drops the colder it gets.

Desiccant dehumidifiers are excellent for use in garages, sheds, holiday homes, boats and caravans. Desiccants are also the best choice to use for drying clothes as they produce more heat which gives a faster drying time.

The guide below is for sizing dehumidifiers in homes, depending on temperature an 8 litre desiccant dehumidifier is about equivalent to a 18 litre refrigerant machine, so for instance the DD8L could effectively manage the humidity in up to a 3 bedroom home and would be the choice if you were drying clothes.

Single rooms or 1-2 bed flat/house – Meaco 10L
2-3 bed house – Meaco 20L or the Meaco DD8L
4-5 bed house – Ebac 3850e

If you have a cold area such as a conservatory or if the house is not heated at night I would tend to recommend a Meaco DD8L desiccant dehumidifier.

Air Comfort Centre Ltd stock a large range of dehumidifiers including all the recommended ones, you can purchase online from our shop or over the phone by calling our customer service team on 01903 218574.

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Different dehumidifiers and their benefits

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Different types of dehumidifiers

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There are 4 types of dehumidifiers available in the UK today: refrigerant dehumidifiers, desiccant dehumidifiers, Peltier and rechargeable dehumidifiers. Which would be best for your application? We hope that you will soon be able to choose.

Refrigeration dehumidifiers

Refrigerant dehumidifiers are by far the most popular in the UK. They pull air through a filter and this passes over the cooling coils, much like refrigerator coils. The coils are very cold and the water condenses out of the air and drips into integral containers (most of the units can be equipped with a permanent drain hose). The air is then heated to room temperature and blown back out of the dehumidifier.

One of the downsides of this type of dehumidifier is the amount of noise they can make, as they work in a similar way to fridges they tend to make the same noises as fridges do and some people find this constant humming a problem, although it will depend where the unit is being used.

On the positive side, refrigerant dehumidifiers tend to be the cheapest on the market and are very strong. Some dryer’s construction production rates can be very high.

Desiccant dryers

Desiccant dehumidifiers do not have a compressor or refrigerant gas. They absorb water from the air with a desiccant material through slow wheel rotation slowly whereby the wheel spins past the heater, and the water evaporates in a container (or the water may be removed from the hose). The inside can be heated to 10 ° C above that of the room temperature and this is then placed back into the room.

Desiccant dehumidifiers extract the same amount of water regardless of the temperature of the air, making them ideal elements in cold areas such as for the protection of garages, sheds, trailers. Also, they won’t lose power in the cold; they are very light and very quiet.

Desiccant dehumidifiers negative aspects are that they are generally more expensive than other refrigeration dehumidifiers, but, as a rule, they are of very good quality. The extraction rate is usually not very high, probably about 7 litres per day, which means that a 1-2 bedroom flat / house will require one unit, although there are many models on the market and you can buy larger units for larger spaces.

Rechargeable Dehumidifiers

These tend to be small dehumidifiers used to keep smaller areas free of condensation, damp, mould and mildew. You can purchase desiccant dehumidifier bags which can be used in areas such as cupboards, drawers, wardrobes, boats and caravans. These bags can be left in the area to be treated and once the indicator changes to show they are full they can be places in a microwave to be recharged. These units are cheap to buy and have no running costs so are very economical.

As well as bags these types of units are also available as plastic dehumidifier units which collect water in the bottom of them and as dehumidifier eggs, as with the bags all of these can be easily recharged in a microwave.

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