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

  • Author: Irene Mills
  • Date: October 27, 2022
  • Time to read: 7 min.
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If 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 crucial 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. 

There are several tools that can help you eliminate moisture and keep your bathroom air clean and fresh. And you don’t have to spend massive money as there are some simple, budget-friendly tricks you can use. 

Let’s take a closer look below..

Best Ways 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. 

An exhaust fan will be worth the investment if proper ventilation is your priority. 

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.

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

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. 

2Use A Dehumidifier 

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Another good source of ventilation can be a dehumidifier. 

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

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

Mostly, dehumidifiers are more effective for smaller bathrooms. 

They tend to be expensive, 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 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 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, it would help if you opened the bathroom door when the ceiling fan was running to make this work. 

Why is this important? 

If you keep the bathroom closed, 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 An Air purifier

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An air purifier removes 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 the air, passing 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 foul odors and improve the ventilation of the room. 

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

5. Install An Air Conditioner

Another solution is to use an air-conditioner.

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

Open the door is a costless and straightforward method to ventilate your bathroom. 

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. 

7Place Portable Fans

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

Place the fan in the correct position to point to 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

How To Ventilate A Bathroom Without Windows

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 an excellent tool for providing ventilation to a bathroom. It prevents condensation from building up after a steamy bath or shower. 

An extractor fan also helps eliminate smells and foul odors after using the toilet. 

Should you get an extractor fan? 

If mold develops in your washroom, you will benefit from an extractor fan. 

Understanding The Importance Of Bathroom Ventilation

Bathroom ventilation is 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 a mold, which thrives in damp areas. 

Mold can quickly multiply and spread on surfaces. This can look pretty nasty and also has negative effects on health. It also eats away things like tiles, cabinets, walls, etc. 

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, a musty, dank smell is tough to ignore. If you suspect mold in your bathroom, you should take action as quickly as possible. 

It is crucial 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, most municipalities require to have some form of bathroom ventilation.

According to ASHRAE guidelines, your bathroom fan should pull out at least 50 cubic feet of air per minute (CFM).

The popular myth is that large bathrooms do not need a ventilation system. A bathroom window is not exactly the best ventilation method to rely on. So, a proper bathroom ventilation system is essential. 

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. It is often your choice whether you want 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 and roof. This can 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 essential aspect of your living space that you must consider. 

Getting an exhaust fan is the best choice if you do not have windows in your bathroom.

An exhaust fan removes excess moisture, eliminates any foul odors, prevents mirror fog, and 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 will make things easier for you in the long term. 

If you still need to rely on the other options, mixing and matching and using multiple methods together is best. 

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

Looking For Air Purifier Guides?

If you’re looking for more air purifier resources, consider checking out our other post on air purifiers.

irene mills author of freshairdevices

(writer & chief editor)

Irene Mills is eager to help others create an indoor allergen-free home. She has years of experience testing out air purifiers, dehumidifiers, and other products designed to help with indoor air quality. Learn more about me.