If you are a follower of our blog, you would know that we discuss a lot about dehumidifiers. One of the most common questions readers ask from us is that “Does a dehumidifier work with windows open.” So, if you are one of them, you are at the right place and this is a must-read. Let’s start.
Does a Dehumidifier Work With Windows Open?
A dehumidifier works less efficiently when windows are open because it continuously draws in humid outdoor air. This makes the dehumidifier less efficient. Let us explain everything in detail.
The primary objective of a dehumidifier is to remove excess moisture in the air to reduce humidity levels indoors. For best results, a dehumidifier should be placed in a controlled environment.
When windows are open, outdoor air freely enters the indoor space. The air that comes from outside to inside can contain humidity, pollutants, or heat. If the outside air is more humid than inside, the unit will have to work hard to remove the excessive moisture in the environment.
So, answering the initial question again, yes, a dehumidifier can work with windows open, but it won’t provide you with the results you expect, especially when the outside air is humid, and it is not something that we recommend.
What are the Drawbacks of Opening Windows When a Dehumidifier is on?
Here are the reasons why you should not open windows when a dehumidifier is turned on.
Reduced Efficiency
A dehumidifier is designed to reduce humidity levels within a specific indoor environment. As we explained earlier, with windows open, you will not get the maximum out of your dehumidifier.
The unit has to work harder and longer to deal with the extra humidity inside.
Increased Energy Consumption
As the machine has to run harder and longer, it results in higher energy consumption. If you happen to use a dehumidifier with windows and doors open, you will end up with an increased electricity bill.
Ineffective Humidity Control
The dehumidifier will find it difficult to control the humidity in your home or room if you keep windows open during the operation. The comfort you expect won’t be available and it won’t prevent mold growth.
Shortened Dehumidifier Lifespan
Since the machine working harder for extended periods than usual, the wear and tear on the machine will be significant. The cost you will have to bear for maintenance and repairs will become higher.
When Is It Acceptable to Use a Dehumidifier with Windows Open?
Even though using a dehumidifier with windows is not something that we approve of, there can be instances where doing so is justifiable. For example, in some cases, you might want to use a dehumidifier with windows open for ventilation purposes. If you need fresh air inside or you want to remove indoor pollutants, you may open the windows even with a dehumidifier on.
In addition, after a process that results in heavy humidity in a room such as after cooking, you can open the windows for a brief period to let outside air come in and reduce the humidity level inside. This also helps the dehumidifier as it reduces the strain on the unit when dealing with heavy humidity.
So, the point is, opening windows during the dehumidifier operation can be done as a strategic move to save energy as well as minimize the work load on the unit.
Best Practices for Using a Dehumidifier with Windows Open
Here are some cool tips you can try when using a dehumidifier with windows open.
- If the outdoor condition is too humid, opening the windows will not be a good option. Open windows when outdoor temperatures are cooler.
- Open the windows only for short periods if the dehumidifier is running inside. You can pick specific times of the day where the outdoor air is less humid.
- If the indoor humidity level is higher than outside due to humid-generative actions, as we explained, you can open the windows to save energy and your unit.
- If possible, adjust the dehumidifier’s settings to handle the additional moisture. There are units that come with specific modes to to cater to various humidity levels.
How Can I Determine If My Dehumidifier Is Struggling Due to Open Windows?
If your dehumidifier runs continuously for longer periods, it suggests that the unit is working hard to control the humidity entered inside due to opened windows.
In addition, you can check the indoor humidity by using a hygrometer. If the humidity is still high despite the operation of dehumidifier, it suggests that opened windows are impacting the humidity inside.
If you failed or unnoticed above-mentioned two points, it can reflect on the electricity bill for sure. A noticeable rise in your electricity bill can suggest that the dehumidifier is consuming more power due to the extra workload caused by open windows.
Regular maintenances are another indicator. Most people tend to forget that the dehumidifier is on when they open windows. If this happens more regularly, the performance of the unit will go down leading to frequent maintenance.
All these factors suggests that your beloved dehumidifier is struggling to control the excessive humidity came inside through windows and doors.
Can I Leave Windows Open Overnight While Using a Dehumidifier?
It’s the same principle. If the outdoor humidity level is low than inside, opening the windows can work in your favor. However, leaving windows open throughout the night is not ideal, as you have no control over the humidity for hours.
So, consider the factors we explained earlier in the article regardless of whether you open windows day or nighttime.
Adam Voges is a seasoned expert with 11 years of experience in the heating and cooling industry. His deep understanding of HVAC systems and cutting-edge home climate technologies makes him a trusted authority on maintaining comfortable and energy-efficient homes. Adam’s blog discusses the latest innovations, best practices, and troubleshooting tips for heating and cooling devices, helping homeowners make informed decisions about their indoor climate control. Whether you’re looking to upgrade your system, optimize energy usage, or solve common HVAC issues, Adam’s insights are invaluable. His passion for sustainable living and his commitment to enhancing home comfort shine through in every article he writes.
