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What is the best bathroom exhaust fan?

What is the best bathroom exhaust fan?

What is the best bathroom exhaust fan?

A bathroom exhaust fan is a ventilation device installed in bathrooms to remove excess moisture, odors, and pollutants from the air. Its primary function is to improve indoor air quality by expelling stale air and introducing fresh air into the bathroom. These fans are typically mounted on the ceiling or wall and are connected to a duct that vents the air outside the building.

The main purposes of a bathroom exhaust fan include the following:

  1. Moisture Control: Bathrooms generate a significant amount of moisture from activities such as showering and bathing. If this moisture is not properly ventilated, it can lead to mold and mildew growth, as well as damage to walls and fixtures. The exhaust fan helps to reduce humidity levels by expelling moist air.
  2. Odor Removal: The fan helps eliminate unpleasant odors from the bathroom by removing them along with the air. This is particularly useful in shared living spaces or homes where odors can linger.
  3. Air Quality Improvement: Besides moisture and odors, bathroom exhaust fans also remove airborne particles and pollutants, contributing to overall indoor air quality.
  4. Prevention of Damage: Excessive humidity in a bathroom can lead to long-term damage, such as peeling paint, warped wood, and deteriorating drywall. The exhaust fan helps prevent these issues by maintaining a proper moisture balance.

Bathroom exhaust fans are usually controlled by a switch near the bathroom entrance or a timer switch that allows them to run for a set period. Some modern models may also include features like built-in lights or humidity sensors that automatically activate the fan when needed. Regular use of a bathroom exhaust fan is recommended to ensure a healthy and comfortable bathroom environment.

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What are some of the best brands of bathroom exhaust fans?

As of my last knowledge update in January 2024, several reputable brands are known for producing high-quality bathroom exhaust fans. Keep in mind that the popularity and performance of brands can change over time, and new products may have been introduced since then. Here are some well-regarded brands known for bathroom exhaust fans:

  1. Panasonic: Panasonic is often praised for its quiet and energy-efficient bathroom exhaust fans. They offer various models with features like humidity sensors and motion sensors.
  2. Broan-NuTone: Broan and NuTone are sister companies, and they are known for a wide range of ventilation products, including bathroom exhaust fans. Broan-NuTone fans are known for their durability and performance.
  3. Delta Breez: Delta Breez is known for manufacturing energy-efficient and quiet bathroom exhaust fans. They offer a variety of models with features such as humidity sensors and motion sensors.
  4. Fantech: Fantech produces a range of ventilation products, including bathroom exhaust fans. They are often recognized for their high-quality construction and performance.
  5. Air King: Air King is a well-established brand offering a variety of ventilation solutions, including bathroom exhaust fans. They are known for their reliable and reasonably priced products.
  6. Homewerks Worldwide: Homewerks Worldwide provides bathroom exhaust fans with various features, including Bluetooth speakers and LED lights. They are known for their combination units that integrate multiple functions.
  7. Soler & Palau: Soler & Palau is a global ventilation company that produces a range of fans, including bathroom exhaust fans. They are known for their high-performance ventilation solutions.
  8. HVI-Certified Fans: When shopping for bathroom exhaust fans, look for products certified by the Home Ventilating Institute (HVI). HVI certification ensures that the fan meets industry performance standards for airflow and noise levels.

When selecting a bathroom exhaust fan, consider the size of your bathroom, the required airflow, noise levels, and any additional features you may need, such as humidity sensors or built-in lighting. Reading customer reviews and checking product specifications can also help you make an informed decision based on your specific requirements.

How many types of bathroom exhaust fans are there?

There are several types of bathroom exhaust fans, each designed to meet specific needs and preferences. The main types include:

  1. Ceiling-mounted fans:
    • Standard Ceiling Fans: These are the most common type, mounted on the ceiling and typically connected to a duct that vents air outside.
    • Low-Profile Fans: Designed to fit in spaces with limited ceiling clearance, these fans are more compact and sit closer to the ceiling.
  2. Wall-mounted fans:
    • Through-the-Wall Fans: Installed directly on an exterior wall, these fans also have ducts that lead outside. They are suitable for bathrooms where ceiling installation may be challenging.
  3. Inline Fans:
    • Inline Exhaust Fans: Placed in the attic or between the ceiling joists, these fans are connected to the bathroom by ducts. They are useful when a more discreet installation is desired, and they can be powerful enough to ventilate multiple bathrooms.
  4. Combination Fans with Lights or Heaters:
    • Combination Fans: These units integrate exhaust fans with additional features such as light fixtures or heaters. They provide multiple functions in one device.
  5. Ventilation Fans with Humidity Sensors:
    • Humidity Sensing Fans: Equipped with sensors that detect elevated humidity levels, these fans automatically activate when needed and turn off when the air has been adequately ventilated.
  6. Smart Exhaust Fans:
    • Smart Fans: These fans can be controlled remotely through smartphone apps or integrated into smart home systems. They may offer features such as scheduling, voice control, and energy monitoring.
  7. Ductless Bathroom Fans:
    • Ductless Fans: Instead of venting air outside, these fans use filters to clean and recirculate the air within the bathroom. While they don’t provide the same level of ventilation as ducted fans, they are an option when duct installation is impractical.

When choosing a bathroom exhaust fan, it’s essential to consider the size of the bathroom, the level of ventilation needed, noise level preferences, and any additional features that may enhance functionality. Additionally, it’s important to ensure that the fan is properly installed and vented to the outside to effectively remove moisture and maintain good air quality.

Do bathrooms really need an exhaust fan?

Want to find out if your home is well-ventilated? If you can spot moist windows, peeling wallpaper or paint, mold-covered walls, or a musty scent in any room, your home is far from well-ventilated.

In a bathroom, not only will the high-water vapor concentration created by a shower create a conducive atmosphere for mildew to flourish, but it will also peel wallpaper and paint, destroy wallboard, and even cause framing members to rot. Hence the need for an exhaust fan in the picture.

Exhaust fans for the bathroom are nothing new. You’re required to use them all the time. They are more than just a tool that, after your relatives pay a long visit, makes your bathroom more tolerable. An exhaust fan helps keep your home safe and reduces the hassle of bathroom maintenance that is otherwise preventable.

Here are some of the benefits:

1. Controls Odors

Odor regulation is one of the principal functions of your exhaust fan. You know what we’re referring to. There could also be trace levels of bacteria in those nasty smells, which is just one more excuse to get that stink out of your bathroom as soon as possible.

2. Improves Safety

You use cleaners with chemicals to disinfect your toilet if you’re like most homeowners. If inhaled, these chemicals can be caustic and cause health problems. In other countries, some common cleaners that we take for granted are actually banned. So, really think of what you use at home! Fans will help sweep those nasty fumes away in the meantime.

3. Reduces Humidity

Moisture builds up in a bathroom without a fan. It might be good for a few minutes to have the sauna effect you get when you turn up the hot water in the tub, but without a ventilation fan, it ruins your bathroom. The atmosphere that molds and mildew need to grow is produced by humidity, and these unpleasant substances not only look bad but can cause serious health problems for you, your family, and even your pets.

Now that you are aware of an exhaust fan’s benefits in the bathroom, it’s time to check out the best exhaust fans from reliable brands like Luminous. They provide a variety of exhaust fans to meet every need!

What are the pros and cons of a bathroom exhaust fan?

Bathroom exhaust fans offer several benefits, but like any appliance, they also come with some drawbacks. Here are the pros and cons of bathroom exhaust fans:


  1. Moisture Control: The primary purpose of a bathroom exhaust fan is to remove excess moisture from the air, preventing the growth of mold and mildew and reducing the risk of damage to walls and fixtures.
  2. Odor Removal: Exhaust fans help eliminate unpleasant odors from the bathroom, promoting a more comfortable and fresh-smelling environment.
  3. Improved Air Quality: By removing airborne particles and pollutants, exhaust fans contribute to better indoor air quality in the bathroom.
  4. Prevention of Damage: Regular use of an exhaust fan can prevent long-term damage caused by excessive humidity, such as peeling paint, warped wood, and deteriorating drywall.
  5. Energy Efficiency: Many modern exhaust fans are designed to be energy-efficient, helping to reduce overall energy consumption.
  6. Additional Features: Some exhaust fans come with additional features such as built-in lights, heaters, humidity sensors, motion sensors, and smart home integration, providing added convenience and functionality.
  7. Code Compliance: In many building codes, especially in areas prone to high humidity, exhaust fans are required in bathrooms to meet ventilation standards.


  1. Installation Challenges: Installing a bathroom exhaust fan may require access to the ceiling or wall, which can be challenging in certain construction situations. Ductwork installation to vent the fan outside may also pose challenges.
  2. Noise Levels: Some bathroom exhaust fans can be noisy, which may be a concern for those who prioritize a quiet environment. However, many manufacturers offer models specifically designed to operate quietly.
  3. Duct Maintenance: The ducts that channel air from the exhaust fan to the outside need regular maintenance to prevent blockages and ensure optimal performance.
  4. Initial Cost: While basic models can be affordable, high-quality and feature-rich exhaust fans may have a higher upfront cost. However, the long-term benefits often outweigh the initial investment.
  5. Energy Consumption: Although many exhaust fans are designed to be energy-efficient, the continuous use of the fan may contribute to increased energy consumption over time.
  6. Ductless Limitations: Ductless bathroom exhaust fans may not be as effective in removing moisture and pollutants as ducted ones, as they recirculate air within the bathroom instead of venting it outside.

In conclusion, the benefits of using a bathroom exhaust fan, such as moisture control, improved air quality, and damage prevention, often outweigh the drawbacks. Selecting the right fan for your needs, considering factors like noise levels and additional features, can help maximize the positive impact on your bathroom environment.

How long do bathroom exhaust fans usually last?

A bathroom exhaust fan has a ten-year lifespan on average. It’s a good idea to buy a new one if you can’t recall when it was last replaced or you’re unsure of its age.

The lifespan of a bathroom exhaust fan can vary based on factors such as the quality of the fan, usage patterns, maintenance, and the specific conditions in the bathroom. On average, a well-maintained bathroom exhaust fan can be expected to last between 10 to 15 years. However, some fans may last longer, especially if they are of high quality and receive regular care.

Here are some factors that can influence the lifespan of a bathroom exhaust fan:

  1. Quality of the Fan: Higher-quality fans with better construction materials and components often have a longer lifespan. Investing in a reputable brand and model can contribute to durability.
  2. Usage Patterns: The frequency and duration of use can affect the wear and tear on the fan. A bathroom with heavy use, such as a shared family bathroom, may see more strain on the fan than a guest bathroom with infrequent use.
  3. Maintenance: Regular cleaning and maintenance can help extend the lifespan of a bathroom exhaust fan. Dust and debris can accumulate on the fan blades and motor, affecting performance over time.
  4. Humidity Levels: Bathrooms with consistently high humidity levels may experience more wear on the fan due to the increased workload of removing moisture. Homes in humid climates might see slightly shorter fan lifespans.
  5. Installation Quality: Proper installation, including correct venting to the outside, is crucial for the effective and efficient operation of a bathroom exhaust fan. Poor installation may lead to performance issues and a shortened lifespan.
  6. Technology and Features: Fans with advanced features, such as humidity sensors or smart functionality, may have more components that could potentially wear out. However, these features can also enhance the fan’s effectiveness and convenience.

If you notice decreased performance, unusual noises, or other signs of wear and tear in your bathroom exhaust fan, it may be time to consider replacing or repairing it. Regular inspection and maintenance, such as cleaning the fan blades and checking for any obstructions, can help prolong the life of the fan and ensure its optimal performance.

Signs Your Bathroom Exhaust Fan Needs to be Replaced

Over time, bathroom exhaust fans may experience wear and tear, reducing their effectiveness. Here are some signs that your bathroom exhaust fan may need to be replaced:

  1. Reduced Airflow: If you notice that the fan is not expelling air as efficiently as it used to, it could indicate a problem. Reduced airflow may be a sign of a worn-out motor or clogged ventilation ducts.
  2. Loud or Unusual Noises: Unusual noises such as grinding, rattling, or squealing can be indications of a malfunctioning fan. Noises may result from a worn-out motor, loose components, or debris caught in the fan blades.
  3. Excessive Moisture or Mold: If you observe an increase in moisture levels or notice the presence of mold in the bathroom, it may indicate that the exhaust fan is not effectively removing moisture. This could be due to a decrease in fan performance.
  4. Inconsistent Operation: If the fan operates intermittently or has trouble starting, it may be a sign of electrical issues, a faulty motor, or worn-out components. Inconsistent operation can compromise the fan’s ability to maintain proper ventilation.
  5. Visible Wear and Tear: Check for visible signs of wear, such as rust, corrosion, or damage to the fan housing or blades. Physical damage can affect the fan’s efficiency and may warrant replacement.
  6. Old Age: If your bathroom exhaust fan is more than 10-15 years old, it may be reaching the end of its lifespan. Older fans are more prone to wear and may not operate as efficiently as newer models.
  7. Humidity Issues: If your bathroom continues to experience high humidity levels despite the fan running, it may indicate that the fan is not adequately ventilating the space. This could be due to reduced performance.
  8. Energy Efficiency: Newer models of bathroom exhaust fans are often more energy-efficient than older ones. If you’re looking to save on energy costs, upgrading to a more efficient model might be beneficial.
  9. Unpleasant Odors: If the fan is not effectively removing odors from the bathroom, it may be a sign that it is not functioning properly. This could be due to reduced airflow or other issues.

If you notice any of these signs, it’s advisable to consult a professional for a thorough inspection. In some cases, repairs may be possible, but if the fan is old or severely damaged, replacement may be the most effective solution to ensure proper ventilation and prevent further issues.

Can a bathroom window exhaust fan with the window louver open or closed be more efficient?

first, determine if the exhaust fan is actually exhausting air to the outside, and not just one of those recirculating fans. in the former, a window open will allow the fan to pull the air through the bathroom efficiently, drawing fresh air in from the window and exhausting the stinky air out through the roof vent or wherever it will exhaust.

Having the window louver closed will be more likely to create a negative air pressure situation, which would result in air being pulled in from under the bathroom door or any other kind of opening and cause the fan to work harder, it being the creation of a vacuum.

With a recirculating fan, which does not add or subtract from the pressure of the room, and simply moves air through the fan and back into the room, the choice of a window open is not as relevant, excepting for the fresh air that could be gotten from the window.

Does turning off the bathroom fan help cool down the room faster when it’s hot outside and inside?

The bathroom fan is there to reduce the moisture in the room which in turn reduces the amount of mold, bacteria and stink in the room. Fresh air is a big help in the bathroom for the overall health of the bathroom and comfort of the people using it!!! So wether it’s hot out or cold out, having fresh air is still important for the bathroom ‘s function.

BUT; Allowing that moisture and stink into the rest of the house is NOT helpful for the comfort of the people in the house. So then, you are always compromising on what is best for everyone in what you do to make things function overall. So turning the bathroom fan off, Never helps, but saves you on electrical costs whenever possible.

How do you unplug a bathroom vent fan?

First, turn the fan off at the switch on the wall.The cover for the fan is installed by wire pressure clips. Get a grip on the cover and pull straight down towards the floor. The fan will drop about four inches. Once it does, you will see the two sets of wire clips, apply pressure to push both wire clips towards their partner wire.

Once they are touching on both sides the cover will remove completely. Once that is removed, there will be an metal plate assembly that hosts the actual fan itself. There should be one side held up by a 3/8 screw and one side held up as a pivot point. Remove the secrew so the plate can pivot down and out of the fan box enclosure. At this point, there is a plug that can be unplugged.

Note: I’m assuming you’re unplugging because the fan is squeeking or not working properly…. If you’ve gotten this far, putting a replacement fan up would be the exact same process as putting the old plate and cover on. Instead, place the old one in a bag and go to home depot. Replacement plates are only about $20 and with your new skillet, it won’t take you longer than 30 min. Good luck!

Is it bad to leave bathroom fan on?

Other than poor installation, the biggest problem with bathroom fans is that people flat out will not use them right.

They’ll either turn it off when they leave, which leaves stink and/or humidity trapped in there, or they’ll leave it on until someone else comes along and turns it off. That person, in turn, often doesn’t check whether it needs to be left on longer, but flips it off regardless just because it’s on. So the fan may be left on for hours longer than necessary or still turned off too soon.

The solution would be replacing the fan’s switch with a timer, as you see in hotel bathrooms that have a heat lamp. But for some reason that’s just not how it’s done.

If you want the fan to clear odors or humidity, you need to leave it on until that job has been done and then turn it off. The time needed will vary from one bathroom to another and also on how big the job is, so to speak.

Can a bathroom fan burn out?

The motor in a bathroom exhaust fan can certainly burn out or seize up. A bathroom exhaust fan is exposed to dust, lint, and moisture on a regular basis.

Even though the bearings are typically the ‘sealed type’ corrosion sets in over time. The dust and lint retain the moisture, therefore exacerbating the problem. Luckily, though, you don’t always have to replace the whole fan. Oftentimes you can buy a replacement motor assembly, and it’s relatively easy to replace, even for the DIY-ers.

Can leaving a bathroom fan on cause a fire?

Typically in most situations, no. It would depend upon the particular situation of the fan in question. Is is old, was the wiring not done properly, is it dirty and struggling to function, is the vent duct clean or clogged, does the motor feel hot to the touch, is the fan surrounded by combustibles, is it making unusual noise, the length of time it is left on, is there a heat lamp involved in the equation, etc.

Seems like a very rare occurrence, but the fact that you even bring it up makes me wonder why. If your gut tells you the situation seems sketchy then you may see or hear something that nobody on a message board knows, and you may want to not risk it. Pop off the grille and have a closer look if you can. Turn it off first, and see if it smells “hot” or strange.

Bathroom fan motors are not like motors on most equipment. They do not have brushes. When a bearing fails, the fan just stops eventually. The noise will drive you nuts, but are not likely to catch fire.

What causes a bathroom fan to stop working?

believe it or not a lot of times it is dust.. those fans suck up any dust particles near them when running and it can build up over time. this can lead to overheating and electrical failure.. most fans can be removed simply by removing one bolt and unplugging the motor.. I usually take my motor out and blow it out with an air hose once every 6 months or so..

Make sure the proper breaker is on then be sure the switch is working and check the wiring to the switch and the fan. The motor could be damaged. Use a multimeter to check voltage to the fan. Check the fan for a blown fuse. If the wires leading to the fan show voltage and the motor still doesn’t come on then replace the fan.

Should a bathroom fan run all the time?

If there is an air-conditioning duct in the bathroom, you don’t really even need the fan if the air-conditioner is running at the time. Otherwise, I would recommend only running the fan when you’re showering. Running it all the time accomplishes nothing after the first few minutes once your shower ends, and will cause the fan to wear out sooner, as well as use excess electricity.

Edit on 11–15–22: Also, the bathroom fan expels air from your home. That air has to be replaced somehow, and the only place it can come from is outside your home. That means hot or cold (depending on the season) possibly humid air will be sucked into your home, causing the A/C or heating to run longer, and raising your electrical bill. If you live in a humid area, that can increase humidity in your home.

Do ductless bathroom fans work?

They certainly work brilliantly at at least one thing. That one thing is the “work” of creating a false first impression that a bathroom space has been brought up to a reasonable level of serviceability by someone who flipped the home on the cheap.

Other than that, they are virtually worthless when it comes to correctly removing humidity and odor, or contributing to the influx of fresh make-up air in the space.

Yes, I realize that some ventless fans have activated charcoal filters that claim to “remove foul odors”. Unfortunately, their performance is generally not that great – and is known to be markedly reduced in high humidity environments like…bathrooms! Plus, now you have yet another filter to buy and replace on a regular basis. Really?

I’m no code Nazi, but flipper-crap like ductless bathroom fans make me a little crazy. So-called ductless bathroom fans do not meet any reasonable code specification for fresh air exchange in a bathroom, nor do they contribute to the spirit of the intent of such codes. In some cases they are used by unscrupulous people to subtly misrepresent the condition of a bathroom with regard to code conformance.

But they do promise much to the inattentive home-buyer, while delivering the unscrupulous home flipper from yet another conformance to best practices in remodeling.

What happens if you don’t have a bathroom fan?

People think that the main purpose for a bathroom fan is to eliminate bad smells, if you know what I mean. That’s only one purpose but it isn’t the main purpose. With showers and baths, the bathroom is typically a room that frequently has much higher humidity than anywhere else in the house.

If a fan isn’t properly sized and installed, this moisture can become a mild irritation and eventually may become a dangerous condition. You’ll notice that your glass and mirrors don’t clear very quickly. It will always feel damp and you may notice a slight mildew or moldy smell.

If left uncorrected you may start seeing mold growing on the walls and ceiling. You definitely don’t want to see this. Fans aren’t difficult to install and if you are a handyman, you can probably do it yourself. If you don’t have one I’d recommend getting one.

Is it safe to leave a bathroom fan on all night?

Actually, My basement had a damp smell when we bought the house 19 years ago. One of the windows down there had a dryer vent hole with a hose hooked up to it. We made an upstairs laundry room so that vent was unused,

I made a modification to a bathroom fan that I bought at a yard sale for $2.00. Hooked it up without a switch running 24×7 sucking air out of the basement, kind of like a radon pump. Only it was a small cheap fan.

One day it stopped turning. I cleaned and oiled it, all was well again. Then it stopped again. That was 17 YEARS into it for my little USED fan! Now I am 2 years into fan #2. I hope this one does that well. If you found my post interesting or helpful, please upvote, share, and follow. Thank you!

Why aren’t there any return airs in bathrooms?

Originally Answered: Why are there not return airs in bathrooms? I must disagree with the “fart fan” theory, sorry.

There are two main reasons. First, it would be uncomfortable to have air movements of that speed – in the limited space of a bathroom, the air inlet would have to be positioned somewhere away from the exhaust fan, and therefore wold make the air in the entire room move. In practical terms, you would feel cold wind around your private parts. Or worse, just leaving a shower you would be feeling cold wind all over.

Second, the air inlet might produce a higher pressure in the bathroom (like, when the wind was in the right direction), and it would push the aforementioned farts further into the house.

  • What you do is this: put an exhaust fan in the toilet, and put an intake somewhere else in the house, preferably a place where you’re usually not naked, wet, or both. Then you make sure the bathroom door isn’t airtight. This is usually easy, as no standard indoor doors are unless they are fireproof or soundproof. And finally, you adjust the air volume sucked from the bathroom to about 50–60 m3/h or so (30–35 cfm in US units) at a fairly low pressure.
  • Actually, buildings will work fine without any intakes for these things; it’s a matter of moist control in the house and a matter of “do you want to have control of the air inlet and air movements in your house?”. Generally, houses more than 10 years old (around here, anyway) donot meet any demanding standards, so they will not be so airtight that this will ever be a problem.
  • I’m not exactly sure how american houses perform in this way, but I have a general feeling that the american perception of a super tight low energy house is somewhat comparable to the danish perception of a garden shed… (sorry). 🙂

So don’t worry. No need to fuss about the air intakes.

Does the fan in the bathroom actually do anything?

If it’s a decent fan and it’s sucking air to outside, then ya! But If it’s one of those crappy contractor grade loud ones, and nobody has checked to see if the duct is clean, with birds and squirrels and republicans nesting in it, then no, it would be effectively useless. Like Mitch’s desk.

upgrade to a new fan with a humidistat if you can, those are awesome. Or put in a proximity switch so it comes on anytime a person walks into the bathroom and runs for at least ten minutes. Very effective for lazy teenagers or old men who stink up the joint but can’t seem to comprehend the ceiling fan switch has an ON position.

A decent bathroom fan should suck all the moisture out of the room, dry up the walls, and even help dry the towels while whispering quiet. A really, really good one will bristle your hair while you sit on the pot. But it’s a little disconcerting if it feels like you’ve got to hang on to the bowl or you’ll lose your pajamas.

So check your current fan to see if something is going through it. Chase out those Republican obstructions!

How do I replace a Nutone bathroom fan motor?

  • 1. Turn off the power and remove the fan grill / shroud if required, as per your model / installation.
  • 2: undo the fasteners securing the fan / motor in position.
  • 3. Disconnect the plug (or wiring).
  • 4: Connect the new fan motor plug (or wiring).
  • 5. Secure the new motor with the fasteners.
  • 6. Turn on the power and test the fan.
  • 7. If OK, replace any other components if they are removed as per step 1.

According to your model; / installation, it may be preferable to reverse order of steps 2 & 3 and 4 & 5.

If your fan is ‘wired in’ rather than plugged in, check if you are permitted to unwire and rewire the fan. Only attempt this if you have experience working with electrical equipment and know how to ensure power is actually OFF!


I personally love the Broan 80cfm fans as they move a good amount of air and are a bit noisy, which covers up bathroom noises quite nicely. Broan has been making bathroom fans for ever. I just put in a 110-cfm fan after I found my fans were exhausting into the attic space and not venting outside. I am very happy with it. Very quiet. The best bang for the buck that I found.

There are some kits where you can just change the guts of your existing bath fan. That can save you a lot of hassle and money. Panasonic fans are among the best. I would go for a 110-cm fan minimum.

What is the best bathroom exhaust fan?