Bathroom vent fans must be vented to the out of doors. Venting this fan into the attic is simply asking for problems. The excessive moisture will cause condensation on the roof members, insulation and eventually cause mold..
Keeping this in consideration, do Bathroom extractor fans need to vent outside?
Most municipalities require extractor and exhaust fans to be vented to the outside of the building with an vent cap. Excessive moisture will cause condensation on roof members and insulation. This will cause mold and could leave your home unlivable. Case in point, don't vent your extractor fan to the attic.
Furthermore, do exhaust fans need to be ducted? To put it simply, if you have a colourbond, flat or narrow pitched roof or sarking (silver paper insulation) in your ceiling space then you will need to have a 'ducted' exhaust unit installed. The recommended air flow rate of exhaust fans state they should be between 50 – 100L/s.
Regarding this, is it OK to vent bathroom fan into soffit?
A: It is never a good idea to discharge a bathroom or kitchen fan through a soffit, gable or ridge vent, or the roof itself. The most efficient way to vent bathrooms is to do so downward through a basement or crawl space and outside through the rim joists.
Does every bathroom need a vent?
Bathroom Exhaust Fan Venting Code Basics. Surprisingly, bathroom fans are not required by some building codes. All municipalities have different requirements, but some do not draw a hard line on requiring exhaust fans. In those areas, ventilation in bathrooms is required, but it can be from a window or fan, your choice
Related Question Answers
How much does it cost to vent a bathroom fan outside?
Cost to Install Bathroom Exhaust Fan Through Roof A bathroom exhaust fan costs between $15 and $300. With labor, expect to pay $60 on the low end and $500 on the high end. This cost depends on the fan price and the project difficulty. You can also redirect air and moisture outside with a roof vent.Do bathroom fans bring in outside air?
Yes, any time you operate a bathroom exhaust vent fan you are removing stale (conditioned) air from inside and replacing it with outdoor air. The purpose of the bathroom exhaust fan is to remove excess moisture and odors from the bathroom.How far can you run a bathroom exhaust fan duct?
eight feet
Who can install a bathroom exhaust fan?
If you hire an electrician, you may also need to hire someone –- a handyman, perhaps -- to patch drywall or do other finishing work. Installing a bathroom exhaust fan usually takes three to four hours, and costs between $165 and $350.How far should an extractor fan be from a shower?
?Zone 1 for a shower room is 2.25m from the finished floor level or the height of the fixed shower head from the finished floor level if more than 2.25m, and the width of the shower basin. If the shower has no basin then zone 1 extends to 1.2m around the fixed shower head.Where should an exhaust fan be located in a bathroom?
Typically a bathroom exhaust fan should be mounted as close to or inside (if rated for tub shower use) to the shower or tub as possible. This will maximize the effectiveness of the unit. Units located in a powder room, should be directly over the toilet.Can I use flexible duct for bathroom fan?
Can Flexible Duct and Air Connector be used for bathroom/shower exhaust fans? Yes. We recommend that you use insulated flex duct in longer vent run applications to assist in keeping the humidity from condensing inside the duct and to help prevent the pooling of water, which can damage the core. Yes.Can I vent bathroom fan into plumbing vent?
The answer is no way! Sewer gas is explosive and could settle back into your exhaust fan which has an electric motor that is not rated for explosive gases. You're now not at code for the sewer or the fan. Vent the fan through the roof as required and fix your sewer vent system.How many air changes per hour should a bathroom have?
eight air changes
Can you run two bathroom fans together?
Each bathroom has its own exhaust fan; each fan vents separately out the roof. But while you can't have two fans with one vent, you can make one fan and one vent serve two bathrooms. This setup requires an in-line centrifugal fan mounted in the attic drawing air simultaneously from both bathrooms (see photo).Do kitchen exhaust fans have to be vented outside?
It's far preferable to vent the air outdoors than to recirculate it into the room. A vented hood that removes steam, smoke, heat, and cooking odors is the best way to keep your kitchen clean, since it gets rid of grease particles that would otherwise accumulate on your walls and cabinets.Do bathroom exhaust fans really work?
If the fan holds up the toilet paper, then the fan is working properly. Keeping the bathroom door open while running the fan will allow for air exchange from other parts of the home. We recommend using bathroom exhaust fans for 15 minutes after using the shower to help move humid air out of the living space.How long do bathroom exhaust fans last?
about ten years
How much does it cost to install a bathroom exhaust fan?
More than nineteen hundred homeowners report that the average bathroom fan installation cost is $372, or between $238 and $535. The fan itself can cost $15 to $300 or more. On average, buying a fan and having it installed costs as low as $110 and as much as $800 on the high end.Do bathroom fans use a lot of electricity?
Basic fan-only ventilation units can use as little as about 6 watts, for highly efficient models, while many standard units often use around 60 watts or more. In general, electricity usage is related to airflow, measured in cubic feet per minute (cfm) and the fan's energy-efficiency.How far does a bathroom vent need to be from a window?
Does a bathroom exhaust outlet vent have to be a minimum of 3 feet from an openable window like vents carrying gases? Plan to have basement bathroom addition exhaust fan duct terminate outside 2.5 feet below a first floor window if able. 2.5 feet is fine.Where should exhaust fan be located in bathroom?
Where is the best location to install my bathroom exhaust fan? Typically a bathroom exhaust fan should be mounted as close to or inside (if rated for tub shower use) to the shower or tub as possible. This will maximize the effectiveness of the unit. Units located in a powder room, should be directly over the toilet. 
