How To Ventilate A Bathroom Without Windows (7 Simple Ways)

  • Author: Irene Mills
  • Date: June 20, 2022
  • Time to read: 8 min.
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Have you ever wondered, ” how to ventilate a bathroom without windows?”, then this post is for you.

Showering or using a bathroom without windows can make it an uncomfortable and unpleasant experience. 

It can be smelly, musty, damp, and even dangerous. Air circulation is extremely important to prevent moisture-build-up which then turns into mold. 

Before you worry, you should know that you don’t have to rely on windows for ventilation. 

In fact, there are several tools that can help you get rid of the moisture and keep your bathroom airy, clean, and fresh.

And you don’t have to spend a huge amount of money as there are some simple, budget-friendly tricks you can use. 

Let’s take a closer look below..

How To Ventilate A Bathroom Without Windows

How To Ventilate A Bathroom Without Windows

Let’s take a look at the different ventilation solutions you can consider to improve the air circulation in your window-less bathroom.

1. Use An Exhaust Fan

The best solution is to get an exhaust fan installed in your washroom. 

If proper ventilation is your priority, an exhaust fan will be well worth the investment. 

The mechanical process of an exhaust fan is designed to eliminate the air in the washroom and bring back clean air.

It also dries up dampness and improves air circulation.

It is best to turn on the exhaust fan for 15 to 20 minutes after you shower or use the toilet. 

This would be sufficient to pull any humid, stale, or contaminated air from the washroom. 

One tip for buying an exhaust fan is to check its size first. It should be big enough to work effectively in your bathroom. 

So, if your bathroom has a measurement of 100 square feet, your exhaust fan should be rated for 100 CFM. 

2. Use A Dehumidifier 

Another good source of ventilation can be a dehumidifier. 

If you have a steamy washroom and no window or exhaust fan, you can use this appliance to prevent excess moisture build-up. 

A dehumidifier works by sucking out the humid air and blowing back dry air inside. In simple words, it dehumidifies the room and keeps the air fresh. 

Mostly, dehumidifiers are more effective for smaller bathrooms. 

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They tend to be on the expensive side, especially if you need one for a large-sized bathroom. 

However, you must know that a regular dehumidifier won’t do the trick or provide proper ventilation. 

A regular dehumidifier releases back the same air rather than replacing it with fresh air. And it does not cycle the air out of the bathroom. 

You would need a commercial-grade humidifier or have them installed into the HVAC system throughout the house

3. Install A Ceiling Fan

Ventilating a bathroom is also possible through a ceiling fan. 

This does not work like a dehumidifier or exhaust fan in terms of drawing out moisture. 

However, if you use it correctly, it can surely help ventilate the room.

Remember, a ceiling fan should move air from another well-ventilated room into the bathroom. 

So, you should open the bathroom door when the ceiling fan is running to make this work. 

Why is this important? 

If you keep the bathroom closed, then the same moist, warm air will move around in the same space. 

Similarly, if the air is coming in from an unventilated room, then fresh air won’t enter inside. 

This can result in moisture and mold-related problems in the bathroom.

4. Use A Air purifier

An air purifier works by removing pollutants, toxins, and allergens from the air. 

It sanitizes the air you breathe by trapping these particles with the help of a filter. 

Sometimes, it also has a fan that sucks in air, which then passes through the filters. 

This keeps the air circulation healthy and fresh indoors. In a windowless bathroom, air purifiers can be beneficial in providing better air quality. 

They can also remove bad odor and improve the ventilation of the room. 

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You can look for air purifiers specially designed for bathrooms. These can be mounted and have filtration systems to keep bad odors and mold at bay, without using any chemicals.

5. Install An Air Conditioner

Another solution is to use an air-conditioner which works as a dehumidifier. 

This will keep the bathroom cool and also remove moisture from the room. You should make sure that the air-conditioner pulls air from outside. 

This mechanism forces out warm and moist air and ventilates the bathroom. 

6. Keep The Bathroom Door Open

A costless and simple method to ventilate your bathroom is to open the door. 

This allows the air to go in and out of the bathroom. Having the door open will help moist or stale air leave the room. 

This is a fool-proof way of making the air fresh again. However, it is inconvenient in some ways. 

It will take some time to work and if there is a smell in the bathroom, it will enter the room too. 

It is best to use this method combined with a fan or dehumidifier. 

7. Place Portable Fans

You can place portable fans inside the bathroom to dry any wet surfaces. 

Simply place the fan in the correct position so it points towards damp surfaces. 

A good idea is to purchase a rotating fan so it can throw air in different directions. A portable fan also has the advantage of being lightweight and small. 

So. you can easily use it for a small-sized bathroom as needed.

Bathroom Without Ventilation FAQ

Below, you will find some common questions about ventilation for a windowless bathroom.

Do You Need An Extractor Fan In A Toilet?

An extractor fan is a great tool for providing ventilation to a bathroom. 

It prevents condensation from building up after a steamy bath or shower. 

An extractor fan also helps in getting rid of smells and bad odors after using the toilet. 

Should you get an extractor fan? 

Well, if there is mold developing in your washroom then you would benefit from an extractor fan. 

Understanding The Importance Of Bathroom Ventilation

Bathroom ventilation is actually really important for your hygiene and health. 

Without a window or vent, a bathroom can quickly become a home for bacteria. 

When using the bathroom, a lot of moisture is released into the air. If this moisture cannot leave the space, it can slowly develop into mold, which thrives in damp areas. 

Mold can easily multiply and spread on surfaces. It also starts to eat away things like tiles, cabinets, walls, etc. 

This can look pretty nasty and also has negative effects on health. 

As a result of mold, there is a risk of fungal infections, respiratory problems, allergies, and asthma attacks. 

Essentially, the air you breathe in will be contaminated. 

Mold exposure can also result in a stuffy, itchy nose, red eyes and skin, and wheezing. 

Plus, there is a musty, dank smell that is very hard to ignore. If you suspect the presence of mold in your bathroom, you should take action as quickly as possible. 

It is extremely important to have proper ventilation in your bathroom, and ensure that it is nice and dry most of the time. 

Does Every Bathroom Need A Vent?

Most of the time, almost every bathroom does need a vent. 

In fact, it is a requirement of most municipalities to have some form of bathroom ventilation.

According to ASHRAE guidelines, your bathroom fan should be pulling out a minimum of 50 cubic feet of air per minute (CFM).

A bathroom window is not exactly the best ventilation method to rely on. So, a proper bathroom ventilation system is important. 

There is a popular myth that large bathrooms do not need a ventilation system. 

However, this is wrong information. Regardless of the size, the amount of air entering or leaving the bathroom does not change.

We highly recommend installing a vent in your bathroom that is appropriate for its size. 

Is It a Legal Requirement to Have Ventilation In A Bathroom? 

It is a legal requirement to have some source of ventilation in a bathroom. 

However, the law does not state that you must have an extractor fan installed. 

Every state or even building can have its own regulations when it comes to bathroom ventilation. 

Mostly, if you have a window, you don’t need to have an extractor fan. However, you can always install it if you want. 

Some buildings don’t even require bathroom fans to be installed. There are different requirements everywhere, and usually, there is no hard and fast rule. 

Often, it is your choice whether you want to have a window or a fan for ventilation. 

If you install an exhaust fan, it must be vented outside. If you vent the fan indoors, this can create many problems. 

The excess moisture will get directed to the walls, roof, and cause mold inside. 

Final Thoughts- No Window In Bathroom Solutions

Ventilating a bathroom that does not have windows can be tricky but you can easily do so by taking a few steps. Installing an exhaust fan, using appliances like an air purifier, ceiling fan, or air-conditioner, and utilizing the doors are good ventilation ideas. 

To summarize, your bathroom ventilation is an important aspect of your living space that you must consider. 

If you do not have windows in your bathroom, getting an exhaust fan is the best choice.

An exhaust fan removes excess moisture, eliminates any bad odors, prevents mirror fog, and also keeps rust away. 

You will need an expert to come and install the exhaust fan for you. 

However, it is the clear winner when it comes to ventilating any windowless bathroom.

Compared to other options, it may be expensive but in the long-term, it will make things easier for you. 

If you still need to rely on the other options, it’s best to mix and match and use multiple methods together. 

Remember, ventilating the bathroom is extremely important to create a safe breathing space for you and your family. 

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