Have you ever opened the door of your closet and been struck by a musty odor. Were you ever surprised to find tiny spots of mildew on a garment you haven't worn for some time? This is a base sense and one that can authentically be avoided by using a closet dehumidifier.
In any closet, but particularly one where the clothes and other items are intimately packed, a tiny moisture can cause these problems. Sometimes we put something away that is a tiny damp; a top coat or a pair of shoes maybe. That small number of moisture does not have much air to evaporate in. There is no circulation of air in the closet and the moisture is trapped in tiny air pockets between the clothes.
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If the room climatic characteristic drops at night that small number of water will condense from the air and that is where the question begins.
We can take steps to avoid these problems. Obviously, we can make sure we only put dry items in the closet. We can leave the closet doors open during the day, particularly if we are already using a dehumidifier in the bedroom. If all else fails we can use a closet dehumidifier.
A closet dehumidifier does not need to have a high water discharge capacity. It does need to be small, quiet, safe and cheap to operate. What choices do we have?
There are three main options. The first is a Thermo-Electric Mini-Dehumidifier. These dehumidifiers are marketed as closet dehumidifiers so how do they measure up? This type of dehumidifier does not have a compressor. It operates by exploiting the heat replacement that occurs when an electric current passes through a composite of two distinct materials. One side gets hot the other side gets cold and water condenses on the cold side. The process is named after the man who discovered it and is known as the "Peltier Effect."
Because it does not have a compressor this type of dehumidifier is advertised as "almost silent". It does, any way have a fan and users have commented on the noise made by the fan which many find intrusive. These appliances are small but not so small that they will fit authentically into a crowded closet. Their electricity consumption is not high in absolute terms but they are much less energy sufficient than, for example, a typical small refrigerant dehumidifier. The water extracted is deposited in a small pail so care must be taken when removing the pail to avoid spillage. Finally, this type of dehumidifier needs a permanent electricity supply so a power cable will have to be run from the closet to a power socket, which almost authentically means leaving the closet door slightly open.
Second there is the Heated Rod Dehumidifier. This does not take off water from the air but raises the climatic characteristic inside the closet which reduces relative humidity and thereby lowers the risk of condensation. If mounted on the floor of the closet it creates a circulation of air by convection. The energy use is almost equivalent to a light bulb and these devices are silent in operation. They are small in diameter but can be quite long. The climatic characteristic at which they operate is well below that which would generate a fire risk. This type also needs a permanent power supply via a power cable.
Third is the Rechargeable Dehumidifier. This consists of a small plastic case containing silica gel, water consuming crystals. It has no consuming parts so is silent. It is also light in weight and small. It can be placed or hung in the closet as required. When the crystals are saturated, after around four to six weeks, an indicator changes color. At this point the dehumidifier needs to be recharged by being associated to a power socket for around ten hours. The electricity provides heat which dries the crystals and is the only energy required by this type of dehumidifier.
If you agree with my criteria, "small, quiet, safe and cheap to operate", you will probably agree with my ranking. Third, the Thermo-Electric Mini-Dehumidifier; Second the Heated Rod Dehumidifier; First the Rechargeable Dehumidifier. In terms of purchase price the Heated Rod and the Rechargeable types are about the same, depending on model, while the Thermo-Electric dehumidifier is the most costly.
My recommendation to anything who wishes to use a closet dehumidifier is firmly in favor of the Rechargeable Dehumidifier. If you have a very large, walk-in closet you have a small room. A "closet dehumidifier" is not favorable for areas of this size.
Closet Dehumidifier - How to Keep Your Closet Dry and Mold Free DEHUMIDIFIER
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