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How to Ventilate a Bathroom Without Windows? [10 Easy Tips]

how to ventilate a bathroom without windows
Written by Elizabeth Fincher
Last Update: August 10, 2023

Using a bathroom without a window can cause some unpleasant situations. It can develop musty smell and mold, leading to health issues.

It’s imperative that you ventilate a bathroom properly to prevent this from happening. This means you should get rid of moisture from the air to keep things comfortable and dry.

Fortunately, ventilating a bathroom without windows isn’t as difficult as you might think.

Understanding the Importance of Bathroom Ventilation

Importance of Bathroom Ventilation

  • Odor

A bathroom with no ventilation will bring stuffy and fetid smells due to the moisture build-up in the air. This can be an unpleasant experience for you and embarrassing if you have guests over.

  • Bathroom comfortability and experience

You spend a lot of time using the bathroom throughout your lifetime. Without ventilation, you will feel very uncomfortable. If you must deal with a smelly and humid bathroom, it will make your morning and bedtime routine very horrendous.

  • Mold

Outside temperatures and heat from your shower can create mold. This fact increases with no ventilation happening or in tiny bathrooms where the circulation of natural air is diminished. Sometimes you will be able to see the mold visibly, and other times it creeps inside the walls.

Either way, this unwanted visitor can lead to many health problems.

  • Structural damage

A surplus of moisture in the air causes mold and damage to your grout, walls, and plaster. This can be extremely frustrating, not to mention potentially expensive.

How to Ventilate a Bathroom Without Windows?

  • Use an exhaust fan

This is the most prevalent way of ventilating a bathroom without windows. They are easy to buy, install and operate. Their job is to take out the bad air with moisture, fumes, and chemicals.

  • Wipe any spills and drips

Maintaining dry surfaces in your bathroom will limit mold, mildew, and unwanted smells. You can do this by wiping off tubs, sinks, tiles, and mirrors. The key is to keep everything dry.

  • Open all the doors and windows nearby

Keeping your bathroom door and nearby windows open will allow fresh air to flow into your bathroom. The new air will replace the humid, moist air in the bathroom.

  • Use portable fans

If you cannot get or afford an exhaust fan, think about using a portable fan. For best results, place the fan near the shower and have it facing the door. Keep your door open so the humidity will be forced out of the bathroom.

  • Use a dehumidifier

A dehumidifier is a device that controls the moisture in the air by minimizing the humidity. It doesn’t replace the air with fresher air, but by removing moisture, it can assist with other ventilation methods. Use the dehumidifier when you want to get rid of extra moisture from your bathroom.

  • Don’t dry towels inside

Restrict the moisture in your bathroom by drying your towels and bathmats somewhere other than your bathroom.

  • Use a moisture absorber

A moisture absorber is precisely what you think it is. It absorbs excess moisture from the air. You can easily buy moisture absorbers in many stores or online to help with your unventilated bathroom woes.

Depending on your moisture level, most moisture absorbers will last around 45 to 60 days.

  • Install an air conditioner

Air conditioners take outside air, cool it, and release that air into the room. It’s not proper ventilation, but it will help with humidity, making the bathroom feel more comfortable and fighting mold because it keeps the temperature lower.

  • Use an air purifier

An air purifier helps move the air around a bathroom, helps with foul odors, and reduces mold particles that are new or already existing in your space.

  • Add a plant

Every little bit counts to ventilate a bathroom without windows. Placing a plant in your bathroom is an excellent way to increase ventilation. This is because plant life absorbs humidity and moisture.

You can use plants like a fern, spider plant, or peace lily because they don’t require a lot of lighting to thrive. What’s also beneficial is that many potting materials are made from a charcoal base, purifying, and enhancing air quality.

Does every bathroom need a vent?

Whether your bathroom is large or small, ventilation is a given, and it must be size appropriate. Bathroom ventilation in a residential area is usually required by law in any municipality.

If there is no ventilation system, your bathroom can become a breeding ground for bugs, bad smells, and mold. These things can seriously negatively impact your health.


1. How long do you leave the bathroom fan on after a shower?

Ans. The Home Ventilation Institute (HVI) states that you should run your bathroom fan for a minimum of 20 minutes after a shower. This is to make sure enough ventilation has occurred. You can always install a timer switch for your fan to help you determine the length of time needed.

2. Is it okay to have a bathroom without a window?

Ans. It’s easy to open a window to air out a steamy, hot bathroom, but not everyone’s home has this. It is okay to have a windowless bathroom if you follow some general guidelines on ventilating the area adequately. If not, your bathroom can get overrun with mold and mildew, which can harm the health of you and your family, and unwanted smells and insects.

About the author

Elizabeth Fincher

Elizabeth started her career as an interior design artist at a multinational interior design farm. She completed her masters degree from the University of North Texas back in 2010. She was also a Spelling Bee runner-up when she was 14. She took interest in bathroom interior designing after joining her first job. Later she started her own firm as an independent artist. She’s been one of the founding members of Toiletsguide. She examines the design and ergonomics of the units we review and directs the interior decoration team of our in-house research facility. Elizabeth plays piano masterfully and always finds time to entertain us in between our busy schedules.

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