Dehumidifiers have a myriad of benefits, for you and your house. For one, your house is less likely to have allergens in the air, which is great during allergy season. Allergens are abundant in humid settings. Your home will also have less dust, meaning you have to dust less, and it can help you breathe better. High humidity levels can also cause creaking floors, mold, musty smells, and peeling wallpaper, all of which can be fixed by getting the right dehumidifier.
When you are shopping for a dehumidifier, it is important to know what CFM you need it to have. CFM stands for cubic feet per minute, and it refers to the amount of air the best dehumidifier can move in a minute.
Know the Terms
It is also important to know the term ACH, which stands for air changes per hour. Air changes per hour is the number of times the air in a room filters through the dehumidifier in an hour. The more humid the air is, obviously, the higher the recommended ACH is because there is more moisture to get out of the air. For air with a 60% to 70% relative humidity, the recommended ACH is 3. For 70% to 80%, the recommended ACH is 4, for 80% to 90% the recommended ACH is 5, and for any relative humidity above 90% the recommended ACH is 6.
But, back to the CFM. To calculate the CFM you need, first determine how many cubic feet the room in question is. Then, multiple the number of cubic feet by the ACH, and divide that number by 60. The resulting number is the CFM that you need. When you start shopping, make sure you remember the CFM that you need, and look for a dehumidifier with a CFM that is the same, or more, than the CFM that you calculated.
You will also want to think about how you want to get rid of the moisture the dehumidifier takes out of the air. Most dehumidifiers have a direct drain feature, but to use it you have to have a floor level water drain. This is extremely helpful if your house is very humid and you need to continuously use it. If you do not need to use it continuously, for example, if you only use it at night, you can just empty it regularly when it gets full. But, if you need to use it continuously, and don’t have access to a floor level drain, look for a dehumidifier that has an internal pump that can pump water vertically to a sink.
Dehumidifiers can be a great asset to have in your house, but it is important you get the best one for your needs. Calculating the CFM and deciding how you want to dispose of the water collected, are two ways to make sure you know what to look for when shopping and will allow you to get the best dehumidifier for your house.