There are a few factors about a dehumidifier that it might be handy to know before you try to buy one. There are many different sized dehumidifiers as well as portable or centrally located units. Knowing the kind that you need will help you make the decision about which one to buy.
For the most part you won't need a dehumidifier with a huge capacity unless you are experiencing the absolute worst in moisture problems. Even if you have a very damp room that is displaying damp spots on the walls or floor a 25 pint dehumidifier will be enough to manage the job. The exact size that you need will not only depend on the amount of moisture to be cleared but also on the size of the area in which the unit will operate.
The capacity of a dehumidifier is measured by the amount of water that the unit is able to remove in a 24 hour period. You might see, when you go to buy a dehumidifier, that it is advertised as a 25 pint dehumidifier or a 50 pint dehumidifier and that means the unit is capable of removing 25 or 50 pints from the air in a day if it is run continuously.
The majority of models contain a removable bucket that fills with the water that is being collected from the air. When this bucket fills a warning light will display telling you that the bucket must be emptied. An automatic shut off operates so that the bucket does not overflow. More advanced models have a hose fitting that allows you to direct the water straight into a drain so that there is no need to bother with a bucket.
Where you place the dehumidifier can be important, particularly if the room you are trying to dry out is a large one. It will also depend on the type of dehumidifier you buy. If you get one with a top-mounted air discharge the unit can be placed against the wall otherwise you will have to place it out in the open to allow the air to circulate around the unit.
Once the initial humidity or moisture problem has been overcome and the conditions in the room have stabilized the operation of the dehumidifier should be required to a lesser extent. If possible you should find a unit that operates quietly so that it can run in the room without creating a disruptive noise. This is where it is important to do a little bit of homework and read dehumidifier reviews to find out which ones operate quietly and most efficiently and which ones are overly noisy.
Although there are some important factors to consider, buying a dehumidifier is fairly straightforward. As long as you know what you want to achieve and the capabilities of each machine you should find the model that will suit your needs.