Dehumidifiers are ideal for all sorts of situations, but when you begin looking at all your options, it is easy to become overwhelmed and confused.
What size do you need? What features should it have? These are just a couple examples of the questions you may be asking yourself. Depending on
what space you’re buying your dehumidifier for, you could end up spending well over $100, so it’s definitely worth looking into these questions before
taking the plunge. This site will help you to understand and decide, we tried to create an informative and honest Dehumidifiers review site for you !
so let’s begin.
How does a dehumidifier work ?
Obviously, before you get a dehumidifier, you should be clear on what they actually do. They are made to remove excess moisture from the air.
They are commonly used in the home for a variety of reasons, but if you get the wrong size, you’ll end up paying too much for a noisy instrument
that works over-time or end up getting one too small that simply isn’t effective enough.
What Size dehumidifier should i buy?
The first step in deciding what size humidifier you need is not measuring your room, but measuring how much water is actually in the air of your
room or space. Use a hygrometer to gain an accurate reading of the humidity in the room you’re going to place the product in. You can purchase one
from just about any home repair or retail store.
Now, if you aren’t able to get your hands on one, there are other ways to determine how much moisture is in the air.
- If your room is extremely wet and contains standing water or lots of puddles, your humidity levels will be between 90% and 100%. This is
considered “extremely wet”.
- If your room feels and smells wet and/or if it contains visible mildew, mold, leaks, or water stains, you’ll have a measurement between
80% and 90% humidity. This is considered “wet”.
- Now, if the room feels very damp and you can still clearly smell mold and mildew (but not necessarily see it), humidity levels will be between
70% and 80%. This is considered “very damp”.
- Finally, if the room just smells musty in humid weather but not all the time, the measurement is probably between 60% and 70% humidity,
which is considered “moderately damp”.
Next up, you’ll want to determine the ACH level, which stands for “Air Changes per Hour”. This will aid you in determining the airflow you need
to properly dehumidify the area you’re going to place your product in.
- If your humidity level is extremely wet, you have an ACH of “6”
- If your humidity level is considered wet, you have an ACH of “5”
- If your humidity level is considered very damp, you will have an ACH of “4”
- If your humidity level is moderately damp, you will have an ACH of “3”
Following this determination, you will finally need to get around to measuring the actual room. Measure the length and width first and then
multiple the length by the width to get the room’s square footage.
As an example, an 8’ wide by 9’ long foot room has a square footage of 72 square feet.
Next up, you need to calculator how many cubic feet are in the room. Square footage will show you how much floor space you have, but this number
will tell you the 3-dimensional measurement using your ceiling height. Take the height of the room and multiply that by the square footage you got
in the previous step to get your cubic feet measurement.
Now, another step: use the ACH level and cubic footage you determined from the previous steps to get your CFM, or “cubic feet per minute”
measurement. To do so, multiply the cubic footage by the ACH value, then divide the result by the number 60.
Following all of this, you should also determine the pints of moisture that will need to be extracted from the air each day.
- For moderately damp rooms, you will need to extract 10 pints of water within 500 square feet.
- For very damp conditions, you need to extract 12 pints of water within 500 square feet.
- For wet conditions, you need to extract 14 pints of water within 500 square feet.
- For extremely wet conditions, you need to extract 16 pints of water within 500 square feet.
Purchase A Dehumidifier
With all of the above in mind, you need to purchase a product that can support your CFM and pint extraction requirements. Luckily, when comparing
models, this information is easy to attain. Simply check the manual or the product information page to find it.
Now, if your CFM levels are significantly higher than what most products support, considering purchasing more than one to properly dehumidify
Additionally, if your CFM levels fall between those supported by dehumidifier , consider sizing up and you won’t need to run it 24/7.
While it initially may seem like you’re putting a lot of effort into making this purchase, without taking these few steps, you’ll likely end up mis-judging
your room’s needs and either spending too much on a too powerful humidifier or, more than likely, getting one that is too small for your space and not
having it function properly.
In reality, calculating these few things only takes a bit of time. If you don’t have the tool needed for the first step, simply guestimate using the chart
provided and go from there. The only solid measurements you will need is your room’s size (width and length) so that the final measurement can
be as accurate as possible.
Finally, if you’re in between sizes, it’s always better to size up for assurance.