Installing new bathroom vent


You are correct in deducing that you can tap into the incoming hot line in the light switch box. It appears that the hot line comes in from either the lower cable or the cable on the upper right in the picture. The cable on the upper left seems to go to the existing light fixture.

You need to connect the hot cable from the bundle of black wires to the hot side of the new switch. You can use a pigtail (short length of wire). Then connect the new black line to the vent to the other side of the new switch. You also need to add the white wire from the vent to the existing bundle of white wires in this box.

The simplest way to handle this might be a double switch that fits within a single gang box.

The one shown is decorator style but these are available in several styles. If you go this route, you replace the current switch. You move the black wire currently on the old switch to one of the common hot terminals on the new switch. You can tell which it is by...

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Is it better to install a bathroom vent fan in the shower or the middle of the bathroom? -Steve

As long as the wiring for your bathroom vent fans is attached to a Ground Fault Circuit Interrupter (GFCI) and the fan is rated for a shower area, the best place to locate your vent fan is on the ceiling in or near the shower where it will do the most good. Vent fans that include a heater, however, should not be installed over a shower.

Another consideration is that the fan should be located away from the intake air source, such as a door or window (if the window will be open). If the window and door will be closed, make sure there is a 5/8” or greater gap under the door to allow fresh air into the room.

Other vent fan installation tips include:

Make sure the vent fan moves enough cubic feet per minute (CFM) of air for the size of your bathroom. Exhaust the air from the vent fan to the outside of the house, not in the attic. Use smooth ductwork and limit the...
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Installing a Bathroom Vent

Do you often feel sweaty right after you have taken a bath? If yes, your bathroom ventilation is to blame. So, how about taking some concrete steps to cure this problem. In roughly 4 hours, you can get rid of the problems associated with bathroom ventilation. The project involves replacing your old noisy bathroom fan with an efficient high capacity unit. So, here we go.

What is a Bathroom Fans and what is its Purpose?
A bathroom has to deal with constant moisture all day long. So, natural it should have a ventilation system to take care of all the moisture in the air. A bathroom vent fan does exactly this and works hard to remove odor, moisture and mold from the bathroom.

But over a period of time, it can wear off. The mirror becomes foggy or there is mold on the shower wall. Fan creates excessive noise. These are tell-tale signs that you need a new bathroom ventilation fan. New fans are much more efficient, quieter...

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Bathroom exhaust fan is the typical type of bathroom vents for most of the houses. This is a project that you can take a few hours to complete. A properly installed bathroom exhaust fan will make your bathroom steam and odor free. Other functions of having bathroom vents are to remove unwanted smells, mold and mildew. It can also reduce dust, allergens and dander. Here are the steps on how to install bathroom vents.

Things that you need:

Bathroom exhaust fan
carpentry tools
handsaw or reciprocal saw


First, determine what type and model of bathroom exhaust fan you will need for the project. Some common models come with allergen-reducing filters. While others are simple and utilitary systems that only serve as fan-powered vents.
Then, locate an area of the bathroom that offers a definite and clear route for venting. Most models found in home improvement stores mount either in the exterior wall of the home or in the ceiling.
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Choosing a location for your bathroom exhaust fan involves two practical issues: where the fan will most easily accomplish its mission, and where the ductwork can be run most efficiently.

Follow the Moisture

First, the fan should be located in the area of the bathroom that is exposed to the most moisture. This is usually the area over the bathtub or shower. The goal of the exhaust fan is primarily to remove wet, humid air that can cause mold or moisture damage, and your bathroom will exhaust most quickly if you position the fan over the area where there is the most moisture.

You can place the fan directly over the bathtub or shower base, but it's sufficient to position it anywhere near the bathing area. If the bathroom has both a tub and shower, or a shower and a whirlpool tub, the fan should go somewhere between the two fixtures.

If the bathing area is in its own room, that room needs its own fan, and you might want to add another fan for the main...

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Installing a ventilating fan in your bath will help eliminate fogged-up windows, steamy mirrors and stale odors. But more importantly, it will help prevent moisture-related problems, such as the growth of mold and mildew. Here, This Old House general contractor Tom Silva shows the proper way to install a bath vent fan. In this particular installation, Tom ran the exhaust duct into the attic and through a sidewall to the outdoors.

Other venting options includes running the duct up through the roof or down through the soffit. Note that the fan must always exhaust to the outdoors; never allow the duct to simply blow into an attic, crawlspace or other enclosed area. Also, the installation of the bathroom exhaust fan will go much quicker if you ask a spouse or friend to help be in the attic while you work from below, or to hand you tools while you're on the...

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Bathroom Fan/Vent and Light Installation : How-To : DIY Network

DIY Network host Amy Matthews shows how to install a new bathroom fan.

Running Drain and Vent Lines – How to Install a New Bathroom – DIY

Drain and vent lines must be positioned precisely, so you should install them before the supply pipes. It may be possible to simplify supply runs by moving a vent

Choosing the best bathroom ventilation fan

Are you redoing your bathroom and need to install a ventilation fan?best ventilation fan to suit your needs whether the panasonic fan or harbor breeze what you must know


Bob Schmidt shows you an option available for venting 1/2 baths and water closets during your bathroom renovation/improvement.

Bathroom vent heater light | Shop for the Best Price & Compare is designed for the quality-conscious shopper. Shop for bathroom vent heater light...

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Bath vent fan codes, installation, diagnosis & repair:

This article series describes how to install bathroom ventilation systems, fans, ducts, terminations. We include bathroom venting code citations and the text also explains why bathroom vent fans are needed and describes good bath vent fan choices, necessary fan capacity, and good bath vent fan and vent-duct installation details. We discuss bathroom exhaust vent codes, specifications, advice.

We explain how to install bathroom exhaust fans or vents, the vent ducting, the vent termination at the wall, soffit or roof, vent fan wiring, bath vent duct insulation, bath vent lengths, clearances, routing, and we answer just about any other bathroom ventilation design or installation question you may have.

We discuss bath vent routing, insulation, slope, termination,...

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Bathroom vent, though a simple device, is essential for maintaining bathroom hygiene and cleanliness. You can install a bathroom vent on your own, provided that you have basic electrical and plumbing skills.

For any bathroom design, a proper layout is the basic key for keeping the bathroom clean and free from moisture related problems such as paint peels, door warps, fungus spore accumulation and stale odors. As the bathroom flooring, walls and ceilings are continuously exposed to moisture, they are susceptible to growth of fungal spores. For many of the homeowners, getting rid of toxic mold and mildews is a never-ending project. Such a problem is quite obvious in bathrooms that do not have any ventilation windows. In order to solve all these major problems, the practical solution is to install a bathroom vent or an exhaust fan.

Installing a Bathroom Vent

A bathroom vent fan is usually mounted on the ceiling to serve the main purpose for removing moisture...

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bathroom vent fan installation | My Web Value

Installing the Vent for a Bathroom Exhaust Fan

Wall and Soffit Venting Options Enlarge Image

The old and noisy contractor-grade bathroom fan always …

How to Install a Bathroom Vent Fan

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How to Install a Soffit Vent and Ductwork for a Bathroom Vent Fan

Always vent the fan to your homeu0027s exterior.

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Illustration of a bathroom exhaust fan

Install a Bath Fan

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Broan Ventilation Fan with Light

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Metal bath exhaust fan duct installation in new construction (C) Daniel Friedman …

Bath Exhaust Fans Routed Up Through the...

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Proper venting is critical to the operation of your toilet, and the plumbing code has specific requirements for the diameters of vent pipe and their distances from fixtures. If the vent pipes for your toilet are undersized or placed improperly, a partial vacuum can develop in the waste lines, slowing water flow and promoting blockages. Poor venting can result in a slow-flushing toilet -- you might have to flush twice to empty the bowl -- and the need for frequent plunging. The principles of venting are simple, but requirements for specific drain configurations can sometimes be complicated.

Install the new toilet within six feet of the main soil stack in your house, if possible. The main stack is a length of 3- or 4-inch pipe that runs vertically from the main bathroom to the sewer. The diameter of the stack above the main bathroom reduces to 2 or 3 inches and extends through the roof.

Tie the waste line from the new toilet directly into the stack if the toilet is...

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Plumbing works on the simple concept of “water in -- water out.” In a new home, the plumbing system features three main components, the water supply system, the drainage system and the appliance/fixture set. In most communities, in order to install plumbing, you must be a licensed plumber or you must work under a licensed plumber who approves and oversees your work. Local codes determine standard plumbing procedures, but a new home’s fixture placement, pipe routing diagram and pipe size depends on the home’s individual layout.

Installation Timetable

Sewer accommodation stubs are set before pouring the concrete foundation, but the bulk of the plumbing takes place later. The rough-in plumbing phase, which occurs in conjunction with the wiring and duct installation phase, takes place after the framing is complete, but before hanging drywall. This is the time to install main drains in floors and connect them to the stack. Rough-in drain fittings install now for sinks and...

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