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How Much Does Bathroom Ventilation Cost?

Removing humidity and moisture from a bathroom is often one of the best improvements a homeowner can make. Homeowners will usually find that a new bathroom vent can improve airflow and reduce wall damage caused by high humidity. Bathroom vents and fans come in a variety of styles and options to choose from. Be sure to review those styles and prices before your purchase your next bathroom vent.

The Costs 

  • Minimum cost: $15 for basic bathroom vents
  • Maximum cost: $350 for bathroom vents that are high output or with several features that enable high velocity humidity extraction for larger spaces


Bathroom vent heaters are combination units that provide heating during colder months. They are particularly useful in small spaces or older homes without additional ductwork or electrical requirements. A heater unit will usually require a dedicated GFCI circuit for safety and come in two varieties. A heater bulb can provide direct heat in an area of a bathroom and a heater bulb with a blower can transfer heat throughout the room over time.

Ceiling Exhaust Fans

Ceiling mount fans are the most traditional vent applications used in bathrooms. They have standard duct sizes that are typically in the 6-inch range. Many brands also feature adapter kits to provide quick changeover to a higher output model.

Inline Exhaust Fans

Inline bathroom vents are less obtrusive than other vents and tend to blend in with the rest of the bathroom. They are usually considered a 'continuous duty' application. This means they will automatically turn on whenever moisture is sensed or run at a low speed throughout the day to reduce moisture.

Wall Mount Fans

Wall mount fans function similarly to ceiling mount fans. Wall mount applications can vent through ductwork in the wall cavity to the attic or by an exterior vent through the sheathing. Many single-story homes benefit from a wall mount fan, which reduces the installation requirements of attic venting in smaller spaces. 

Advantages & Disadvantages

A bathroom vent will have numerous advantages in regards to standard of living and the longevity of the house. Venting humidity can prolong paint life and reduce the chance of mildew from infiltrating the house. Bathroom vents have also changed radically over the years to accommodate consumer choice in style and function. A decorative fan can increase the style of the bathroom while still pulling a large amount of humidity from the room. Most bathroom fans are also less noisy than their predecessors.

Some of the higher-velocity units or in-wall units may require extensive modification of the bathroom to accommodate additional wiring and vent pipes. Heaters will also require a dedicated circuit. Limited 100-amp circuit panels may need to upgrade to a subpanel or to a higher load for installation.

Homeowners should consider both the space requirements of a bathroom vent as well as additional airflow of the house. Under sizing a vent can underperform the extraction of moisture. An oversized unit could create unnecessary draft in the home or a vacuum during operation. Measuring the square footage of the bathroom and calculating the cfm (cubic feet per minute) of airflow required can eliminate much of the guesswork in installation.

Last updated on May 13, 2016

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