How to Vent Your Bathroom with no Outside Access

  • Vent beneath the floor. If your bathroom is situated away from your exterior wall, venting through the roof is impossible. …
  • Add a ceiling vent. …
  • Expand your bathroom ducts. …
  • Add a recirculating fan for your half bath. …
  • Install commercial ductwork. …
  • Add a fan.

Can you install a bathroom fan without attic access?

Bathroom fan installation requires outside ventilation. If the fan isn’t accessible through an attic, you’ll need to vent through a sidewall of your house. These types of ducts and vents are typically installed when the house is built.

How do you install a bathroom fan where one does not exist?





Connect the wire to the bathroom fan

So how to wire a bathroom fan where one does not exist? Use slide clamps over the duct at both the fan housing and roof cap. Slip the clamps over the tailpieces of the fan and roof vent tighten it. Also, wrap the joints using duct tape.

Does a bathroom fan need to exhaust outside?

Note that the bathroom vent fan must always exhaust to the outdoors; never allow the duct to simply blow into an attic, crawlspace or other enclosed area.

How do you vent a bathroom with no outside access?

Installing a ceiling vent is probably the most efficient way to ventilate a bathroom with no outside access. A ceiling vent is a unique machine that allows air to escape from the bathroom. In other words, it’s a machine that, like an open window, allows moisture to escape from your bathroom.

How do I install a bathroom vent without attic access?





Typically, the fan’s housing is attached to the ceiling joists. For those homeowners who don’t have access to the bathroom fan from the attic, the brackets or mounting screws will need to be removed from below. When cutting brackets, it’s advised that you use either a reciprocating saw or an oscillating saw.

Can I install my own bathroom fan?

Whether you need to install a new wall bathroom exhaust fan or a ceiling bathroom exhaust fan, bathroom fan installation is a project you can do yourself.

What do you need to install a bathroom fan?

You’ll need basic hand tools, a power drill and a jigsaw. The basic operations include hand sawing a small drywall opening, driving sheet metal screws into aluminum ductwork, cutting aluminum duct, climbing on the roof and sawing a larger roof vent opening, and disconnecting and reconnecting electrical wires.

Can two bathroom fans be vented together?

Well, you can’t! You’d often blow air from one bathroom into the other, and local building inspectors wouldn’t approve it. But while you can’t have two fans with one vent, you can make one fan and one vent serve two bathrooms.

What is the point of a ductless bathroom fan?



A ductless fan removes excess moisture from the bathroom air by passing air through a filter that draws moisture from the air. This humidity control function is critical to keeping your bathroom fresh and your furniture in tip-top shape.

How does a ductless bathroom vent work?

Typically, these fans work by processing the air so that they can remove the odors easily and quickly. The fans rely on an activated charcoal filter that is capable of making sure the air is fresh. The filter helps to circulate air throughout the whole room; hence, removing any smell from it.

How does a ductless exhaust fan work?

Ductless fans have a major difference from their duct siblings, which is they require no ventilation. These fans use a charcoal filtering system that allows them to remove unpleasant odor and dust from the air without the need for ventilation.