Home > Blog > How much water should a dehumidifier collect in a day?

How much water should a dehumidifier collect in a day?

Last Updated:

All dehumidifiers extract water from the air, but how much should your device collect?

The answer depends on several factors, such as the air humidity, the size of your machine, its water tank, and the setting you use. As a result, portable dehumidifiers contain some water collection tanks.

This post examines how much water your dehumidifier should be extracting and how you can impact the performance.

Quantity Of Water Collected In A Day

If we look at the average dehumidifier, it can collect roughly 2 and 5 gallons of water daily.

However, a few other factors will affect the quantity of water collected, such as the time it runs during the day, the weather, the space size, and the amount of humidity and excess moisture in the air.

Dehumidifier Size

These can be purchased in a range of sizes to suit the needs of your home or office space. For most homes, one that can remove around 2 gallons of water should be adequate for removing small amounts daily.

For those living in an area of high relative humidity or a larger space, look at one that removes more than 5 gallons of water.

Relative Humidity levels

According to the Mayo Clinic, the average humidity level in your home should be between 30-50%, which means that the air in your household is 30-50% of the maximum excess moisture it can hold.

Running Time

Suppose you run your dehumidifier continuously for long periods. It will affect how much water the dehumidifier collects.

There is no need for your dehumidifier to run for extended periods, as it should only really be needed once the humidity level goes over 50%.

If the humidity level drops below 30%, it can impact your quality of life as it provides the perfect conditions for certain bacteria and mold to grow.

Weather Conditions

Dehumidifiers are designed to be used when the air temperature dehumidifiers are warm. They will collect far less water vapor from the atmosphere if it is cooler than on warmer days.

Required Space 

If you are looking for a dehumidifier for your entire house, they will remove far more than one designed to be used in a single room.

These entire house units are much bigger and can remove far larger quantities of water from the air than the smaller single-room ones.


How Quickly Should A Dehumidifier Fill UP?

Desiccant dehumidifiers will usually start collecting water as soon as they are turned on. However, it can take around 6-7 hours to be full.

How Much Water Should My Dehumidifier?

Typically a dehumidifier collects between 2 – 5 gallons of water daily. That will depend on the relative humidity level in the air and other factors such as running time, water capacity, and weather.


The average dehumidifier should collect between 2-5 gallons of water daily, but a few factors can affect this quantity. Things such as the water capacity of the unit, the size of the space, weather, humidity level, and running time.