Exceeding the standards on the content of moisture in the room - the problem, the consequences of which may themselves be sad. So, eg, for industry - a corruption of products and packaging, and for apartments and private homes - reduced quality of life, а также мелкие и крупные бытовые неприятности. 
As is well known the water content in the air should not exceed fifty masses / sixty percent, if it is higher - this is a serious signal that, it's time to how to tackle this issue. Many people mistakenly believe, that are capable to cope with this "trifle", but, later, often regret that, that time does not entrust this work to professionals. Of course, engaging profile of the company will be more expensive, but the result will be durable and guaranteed. Voicing your budget, experts will try to pick an option, or a combination, that you were the most satisfied.
But still, which may be ways to remove excess moisture from the air?
Most wait and well-proven method - a dehumidifier buy which can be in almost any online store. These units are fairly easy to operate, but they can seriously and permanently rid you of an existing problem. Much easier to intelligently select a suitable device, than to deal with the consequences of his inaction.
Where do you want to start, to a reasonable and balanced way to solve the problem to remove the excess moisture from the room?
The most important thing - is to make sure, the problem of high water content in the air flows does not first cause, eliminating that, you can do without the purchase of HVAC equipment. Unfortunately, independently carry out a full analysis of the measurements and make a hygrometer is very problematic. If you still would, what dehumidifiers - this is the only possible way out of this situation,, it should be borne in mind, that there are different kinds of them, and some additional features, You do not need, as you may seem at first glance.
If you need consumer unit, the choice much easier to make and the price it is quite acceptable. But, if necessary, to purchase industrial equipment - the main thing to find a reliable company, which will pick up and implements the developed project. Also, lately, an increasing number of requests for drainage basins and cellars, that is especially true for private homes. Sometimes one of the drying unit may not be enough and then you need to install any number of appliances, or combine them with air units. How view, there are many nuances, which can not be ignored.
_