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How to Select a Dehumidifier


Greetings all,


As the temperatures are starting to rise throughout the country, so will the relative humidity in most cases.


In areas where humidity isn't needed, such as a damp crawlspace or lower level bedroom that gets a bit musty, using a dehumidifier is a must....even year round.


As you may or may not know, having substantial amounts of moisture in your home can lead to mold issues, as well as experiencing the feeling of the air being warmer than it should be. With that said, your relative humidity in your home should never exceed 50 percent, save for people with respiratory issues (that's where a humidifier comes into play).


At the Home Depot, we carry 2 types of dehumidifiers: portable and whole-house. At your local Home Depot, we carry an abundance of the portable versions that will best suit your needs.




Dehumidifiers are rated for how many pints of moisture that can be removed within a 24 hour period. The larger the area you need humidity removed, the larger pint capacity needed in order for it do its job efficiently.


The diagram below bests explains this.





All of our dehumidifiers come with a standard 115V 15 amp plug in to power them up. Most also come with a 5/8" garden hose hookup, which allows for drainage instead of having the tank being filled and requiring it to be emptied constantly (which would allow it to shut off automatically).


There's other features too that will require you to do periodic maintenance, like ensuring the filters are cleaned for best performance. However, with newer digital settings and fan speeds, newer dehumidifiers are easy to maintain over their lifespan.





After finding the right dehumidifier for your area, placement is the next step. Place the dehumidifier in a central location where you intend to use it, or nearest to where moisture is a issue, such as a basement foundation wall.


Be aware at this stage to find out where the drainage via the garden hose will go if you want this. If you don't do this, remember that you will need to periodically empty the tank so it can function properly.




The 2nd type of dehumidifier is the whole house type. These work just like the portable type, but on a much larger scale. You'd typically find these being installed by a professional and used for a home that has humidity issues throughout it.


Lastly, using a dehumidifier may assist, but it may not necessarily be a long-term solution for repeated instances of humidity in that area. 


For example, placing sheets of 6 mil poly down on a crawlspace dirt ground to painting a waterproofing membrane on a basement wall can substantially help cut down the amount of moisture in the area.


Always plan out and test how much relative humidity is in the area, see if it can be remedied or reduced via materials such as the ones mentioned above, and then use a dehumidifier.


Let us know if you have any further questions,



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Posted 2015-04-15T16:04:43+0000  by Joseph_HD_ATL Joseph_HD_ATL
Outstanding cover of dehumidifiers Joe!

As a practical matter, I always locate the dehumidifier close to a plumbing drain or next to the air conditioning condenser.

The included garden hose connector fed into your drain provides a simple way to empty water from the collection chamber.

Next to the AC condenser, you'll have access to a passive, gravity-feed PVC drain or a condensation pump.

Either will make quick work of emptying the collection chamber.

Because your unit turns off automatically when the collection chamber is full, and you simply will not remember to manually empty the chamber.

As efficient as these units are at removing moisture, you can increase their effectiveness using a ceiling fan or floor fan to actively move the air around the area.

Moving air evaporates moisture more quickly and the dehumidifier will remove it even more rapidly.
Posted 2015-04-21T22:01:52+0000  by Pat_HD_ATL
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