How to Vent a Bathroom with No Outside Access or Window


Spread the love

Estimated reading time: 7 minutes

If you have a bathroom with no outside access, how do you ventilate it?

The answer is to find some way to open the space. But how can this be done if there’s no window or external door? The answer is by finding an alternate method, such as using a power vent fan that exhausts air out of the home.

You may also use a solar-powered ventilation system. However, these two methods are more expensive and less common than other solutions for bathrooms without windows or doors.

How to Vent a Bathroom with No Outside Access or Window

Related: Is It Safe to Put a Bedroom in the Basement? Pros and Cons

How to vent a bathroom with no outside access or window

The answer is to find some way to open the space. But how can this be done if there’s no window or external door?

1. Find a Spot to open a hole:

Find a spot in your home that has the appropriate amount of space to install an exhaust fan- a basement, utility area, or any room with a floor that is lower than the bathroom. The answer to how can this be done if there’s no window or external door lies in how you find an alternate method for opening the space.

2. Install vent pipes

Install vent pipes by cutting a hole through the wall and installing a 4-inch PVC pipe, then connect it to your bathroom’s drain line.

3. Buy a vent fan

The next step is to buy a vent fan with a built-in damper or one that is rated for outdoor use if you plan on using it outdoors. This might cost you as much as $300. A cheaper alternative to fix the ventilation in a bathroom without a window is with a solar-powered ventilation system or power vent which exhausts air out of the home.

4. Direct the ventilation fan airflow appropriately

Make sure that the airflow from your exhaust fan is directed away from windows or doors because it could cause condensation problems. Condensation problems in the house will create excess humidity which is not good for the wood or paint.

5. Will you use your ventilation fan indoor?

If you are going to be using your vent fan indoors, make sure there is enough clearance between the ceiling and any furniture so as not to block airflow. Vent fans are not designed to be used in tight or cluttered spaces.

How Much Does Bathroom Ventilation Installation Cost?

How Much Does Bathroom Ventilation Installation Cost?

The answer to how much does bathroom ventilation installation cost? is not a straightforward one, as it varies by the type of venting solution used.

A power vent fan that exhausts air out of the home costs $300-500 and depending on how many bathrooms you have in your house may be worth investing if there are no other options for how to fix a problem with lack of window or door access.

If you use a solar-powered ventilation system or buy a less expensive option like an exhaust fan rated for outdoor use (which can still run upwards of $200) then this will significantly reduce how much it will cost to install new ventilation into your bathroom without windows or doors.

What is the cost of hiring a professional to fix your ventilation fan in the bathroom?

What is the cost of hiring a professional to fix your ventilation fan in the bathroom?

The answer to how much does it cost for a professional to fix my vents in the bathroom is also very complicated, as there are many factors that can affect how much this will cost.

A general rule of thumb is that you should plan on spending more than $500 if hiring someone to install ventilation in your home’s bathroom without windows or doors. This doesn’t include any unforeseen costs like excavation needed before vent pipes can be installed.

The potential need for excavation would increase how expensive it could get depending on what else needs to be done such as adding drainage and grading soil around the installation area or repairing portions of the foundation after installing new piping by hand (which may require heavy machinery).

5 Signs of Bathroom Ventilation Problem

The easiest way to tell if your bathroom is venting properly or not is how often you have to clean the mirrors. If they are always cloudy then this means there’s a problem with ventilation that needs to be fixed sooner rather than later.

If you notice mold in corners, on the surface of walls, and around windowsills, it could be caused by too much condensation getting into your home which would need to be addressed as quickly as possible.

A lack of air circulation will lead to an increase in bacteria growth which can cause unpleasant odors throughout the house. It may also contribute to respiratory problems for people who spend time in the bathroom due to allergies or asthma.

So answering how long should I wait before fixing the ventilation problem in my bathroom becomes easier to answer when thinking about how well do I breathe.

Also Read: Insulating Windows: The Secrets to Keeping Your House Warm in the Winter

Can you vent a bathroom fan through a wall?

It depends. Does the wall lead outside? If it doesn’t then no, you can not vent a bathroom fan through the wall.

What happens if you don’t vent your bathroom?

If you don’t vent your bathroom and it doesn’t have a window or door that can be opened then the humidity levels will build up.

This could result in increased mold growth if there is enough moisture present, which means more cleaning for the homeowner! If this continues long enough without being addressed, furniture may start to shrink due to high humidity levels as well.

A lack of ventilation will also lead to an increase in bacteria all over surfaces like walls, windowsills, and ceilings that are moist from condensation.

Keep in mind that not only do bathrooms need venting solutions but kitchens too because they often have similar issues with excessive moisture buildup on surfaces near cooking areas or dishwashers.

How much does a power vent fan cost?

power vent fan

The price of a power vent fan ranges depending on the size you get and the features it comes with.

A larger bathroom might need more power as opposed to one that’s smaller so this will affect how much your bath exhausts cost.

It can be hard to estimate what kind of ventilation fans are needed for each room, but in general, most homes would benefit from installing at least two vents: one near where people shower or bathe (even if they share) and another somewhere else in the home like an attic space or basement area.

This is because humidity levels build up when bathing which means there needs to also be some form of dryer such as a wet-dry vacuum handy nearby too!

Does a bathroom without shower need a vent?

Yes, a bathroom without a shower needs venting so long as water is used inside the bathroom.

Can I use a dehumidifier instead of a bathroom fan?

No, a dehumidifier will not remove enough moisture from the air. A humidifier is a device that increases the humidity of the air, typically by heating it.

Humidifiers are used to relieve symptoms caused by colds or allergies but may also be helpful in relieving respiratory conditions such as asthma. A humidifier can make breathing easier on your lungs and nasal passages while soothing coughs due to dryness.

It cannot be used in a bathroom effectively.


This article was meant to provide some advice about the most important things homeowners should know when venting a bathroom.

If you’ve been noticing moisture on surfaces like walls, ceilings, and windowsills or notice that your furniture is shrinking because of high humidity levels then it’s time to fix this problem before any damage occurs!

Be sure to take into account how big your home is as well as what kind of features are included with the ventilation fan so there is enough power for each room if (or when) they need fixing in the future.

Spread the love

About the author

Pretium lorem primis senectus habitasse lectus donec ultricies tortor adipiscing fusce morbi volutpat pellentesque consectetur risus molestie curae malesuada. Dignissim lacus convallis massa mauris enim mattis magnis senectus montes mollis phasellus.

3 thoughts on “How to Vent a Bathroom with No Outside Access or Window”

Leave a Comment