Full Answer
Can you have a ridge vent and a fan on roof?
Each side of the roof is sloped, so the sides of the roof meet at the top of the roof in a very short ridge vent about three feet long. It seems from what I have read that having both a powered fan and a ridge vent at the same time is taboo.
Can a bathroom fan vent go through the roof?
Another scenario is preferred venting through the roof because it might be more aesthetically pleasing. Some people don’t like the idea of vents sticking out of the side of their house and prefer the less visible option of going through the roof. How to Vent a Bathroom Fan through the Roof. Determine the location in the bathroom of your fan vent.
How do you vent a bathroom with no outside access?
The easiest way to vent a bathroom with no outside access is to install a ceiling vent, but you have other options to consider, too. You can also add more ductwork, get a floor vent, or just use a fan to add extra airflow during your projects.
Can you use a slant back vent for a bathroom fan?
It should not be used for double-duty for a Bath Fan exhaust. Warm moist Bathroom air will condensate on its underside and can cause moisture damage & mold on the roof sheathing. As a Slant-Back Vent, the original photo shows it installed backwards.
Can I vent a bathroom fan out the ridge vent?
Yes, you want to vent a bathroom fan to the outside. You don't want the moisture in the attic. All of ours are vented through the roof.
Can you vent a bathroom fan through an existing roof vent?
If you have access to the attic, the fan can vent through either a gable wall or the roof. Letting the fan exhaust into an open attic will cause moisture buildup on the underside of the roof. Avoid venting through a soffit vent or ridge vent.
Can you run exhaust fan ridge vent?
Combining an attic power vent fan with a ridge vent is usually not recommended because: It could reverse the natural flow of hot air out the ridge vent. If air is drawn in through the ridge vent while it's raining, it might pull rainwater in with it, which could lead to leaking or mold in the attic.
Can you vent a 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.
Is it OK to vent a bathroom fan through the soffit?
A bathroom fan can be vented through soffit so that the warm air from the bathroom comes out through it and goes outside. However, It is important to keep in mind it can not be vented into the soffit, as this will lead moisture back into the attic.
What is code for venting a bathroom fan?
Section 1203.4. 2.1 of California's building code requires all bathrooms with a bathtub, shower, spa or similar fixtures to be ventilated by an exhaust fan. The fan must be Energy Star-compliant and vented to the outside.
Is it OK to vent bathroom fan into attic?
No, you should not vent a bathroom fan directly into an attic. The problem with venting into the attic is that the moisture-rich air may form droplets on the wood sheathing, insulation, rafters, and ceiling joists, leading to mold growth.
Can you vent a bathroom vent into the attic?
No, you cannot vent your bathroom exhaust fan into the attic. You should never exhaust the bathroom fan directly into the attic. Your attic is not a temperature-controlled environment, is never the same temperature as your living space and generally closer to the temperature outside.
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.
Can you use PVC pipe to vent a bathroom fan?
PVC piping is an excellent material to use for venting your bathroom fan as long as the correct type of pipe is used. PVC creates a better seal than metal, so you won't experience any problems with leakage as you could with using metal ducting pipes.
How far can you run a bathroom fan vent?
Generally a 4 inch flex duct can carry a fan exhaust for up to 25 ft. Most codes require that.
How do I install a bathroom fan without attic access?
1:385:13You should have a little romance connector holding your wire to your box go ahead and loosen thoseMoreYou should have a little romance connector holding your wire to your box go ahead and loosen those screws pull the wire. Now disconnect your duct. Mine is taped on I'm just going to pull the page.
Do I need a separate vent for each bathroom fan?
Bathroom fans can share a common vent. Both fans must be of similar capacity and have back-draft dampers installed. The duct must be over-sized by one inch for every additional fan added to the system.
Can you connect two exhaust vents together?
If you have two bathrooms that are close together and one has an exhaust fan and the other doesn't, you might be wondering if you can tie a new exhaust duct into the existing one. Well, you can't! You'd often blow air from one bathroom into the other, and local building inspectors wouldn't approve it.
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 fan without attic access?
1:385:13You should have a little romance connector holding your wire to your box go ahead and loosen thoseMoreYou should have a little romance connector holding your wire to your box go ahead and loosen those screws pull the wire. Now disconnect your duct. Mine is taped on I'm just going to pull the page.
How long does it take to install a vent in a roof?
You can buy special purpose vents that need just one more hole in the roof and a modest amount of shingle work to install. About an hour for a competent installer.
How big should a common exhaust line be?
The common exhaust vent line must be at least 1 size in diameter larger than the two individual exhaust lines feeding it. That is.. if your individual exhaust lines from each fan are 3″ in diameter, the common line where they get tied together with a wye needs to be 4″ at minimum to allow for both fans running at the same time. 6″ would be better.
What is the minimum radius of a 4" exhaust duct?
The common exhaust duct needs to have no “kinks" where the turn radius is less than 2x the diameter of the duct. So a 4” duct minimum turn radius is 8.”
Can a vent hood pull air?
In commercial kitchens that I work on, there is actually a fan driven, filtered make-up air fan that adds air to the kitchen so the vent hood can pull cooking gases, odors and fumes up and away. Without that device, due to the enormous air appetite of a vent hood, it would pull all the conditioned air from the space, pull air through any opened door (along with vermin) and, in the worst cases, make it difficult to open an out-swing door.
Can you pair a 200 CFM fan with an 8 CFM fan?
The fans need to be of similar capacity. That is you shouldn't pair a 200 CFM fan on a line with an 8
Is it safe to open an exhaust fan to the atmosphere?
Builders had to virtually poke holes in the structure to allow outside air to feed the exhaust fans appetite for air. Yes, you now have taken your “hermetically sealed”, eco-friendly space and opened it to the atmosphere. Welcome to Physics 101.
Can you use a soffit vent in the attic?
Do not use a soffit vent. This a place were air enter the attic.
Where Do Bathroom Vents Take the Air?
The job of a bathroom vent is to take air inside your bathroom and vent it outside of your house. Bathrooms are hot spots for humidity, moisture, and bad odors. Bathroom fans help to protect you from each of these things and potentially save your house.
Can a Bathroom Fan Vent into the Attic?
Your bathroom fan should never vent to the attic under any circumstances. In years past, venting a bathroom fan to the attic was acceptable, but it’s no longer acceptable as we’ve learned more about condensation and mold damage.
Can a Bathroom Fan Vent through the Eave?
Venting a bathroom fan vent through the eaves or soffit of your house is also a viable option . In my experience with venting bathroom fans, this was a preferred method because of how easy and effective it is. There are several advantages to venting through an eave versus the roof or sidewall.
Are Bathroom Fans Vented Outside?
Bathroom fans should always be vented to the outside rather than through the ceiling and into your attic. Venting your bathroom fan anywhere other than outside runs the risk of mold forming. Most building codes will require you to vent your bathroom fan to the outside of your house. Even when this isn’t the case, the best practice is always to vent to the outside.
What is ridge vent?
The ridge vent is for ventilating the attic. Not your bathroom. You need a pipe through the roof, properly flashed and booted.
Do exhaust vents terminate in attic?
Good luck and keep your BS detector handy. If other exhaust vents terminate in the attic, it's time to fix those too. Each duct run needs its own roof passthrough unless you're using a Y setup with one fan at the base of the Y for two locations. Be careful if so, those can be tricky if the duct runs from the rooms to the base of the Y aren't of equal length.
Can air move from exhaust duct to attic?
It should be vented in a way that NO, ZERO, air can move from the fan exhaust duct into the attic.
Can you vent a fan into the attic?
It should be vented in a way that NO, ZERO, air can move from the fan exhaust duct into the attic. Connecting a duct to the top of the inside of the roof where the ridge vent is, if that's what he's suggesting, is a poor idea and likely not to code.
Can you use a soffit vent for a bathroom fan?
Actually, I have no problem with a soffit vent for a bathroom fan. they make vent 'caps' for this.
Do you have to have a soffit vent in the attic?
40 years ago, building code said exhaust need to just above ceiling insulation in the attic, 20 years ago, it changed to gable, ridge or soffit vent, now, required to the outside of attic. So, they all work (at least 20 years), it is up to you and how much you want to pay. Myself, don't like a pipe go through my roof, one more possibility of leaks in a few years if they did not do it right. (remember, people do the bathroom work are not roofer)
Should bath exhaust fan be vented to roof RIDGE VENT through attic?
Is this a valid exit location? Allowed by code? I can't seem to find anything suggesting this as an option. How would the ducting be attached to the vent? Will moist air even move (straight) up and out? I have purchased a Fantech remote fan unit (PB110, and insulated flexible ducting, as suggested) to be mounted in attic. We cannot see where, or even if, our existing fan is vented. It is located on a sloped ceiling between two dormers. We intend to move the new fan grill (with light) to the center of the horizontal ceiling. Not sure if it matters, but roof is steep and we reside in Zone 7. Thank you for any advice on this proposed solution.
What is a ridge vent?
This is a ridge-mounted, Slant-Back Roof Vent -- it's used to ventilate Attic air to the outside. It should not be used for double-duty for a Bath Fan exhaust. Warm moist Bathroom air will condensate on its underside and can cause moisture damage & mold on the roof sheathing.
Is blocking off an existing roof vent a good idea?
Agree that effectively blocking off an existing roof vent is not a good idea for the long term health of the roof. In my experience ventilation is often lacking in that regards already.
Can exhaust vents be installed through siding?
If this installation is to be done by an average Homeowner or Handyman, I typically recommend a siding-mounted vent.
Can you retrofit a roof vent?
If this installation is to be done by an average Homeowner or Handyman, I typically recommend a siding-mounted vent. Retrofit roof vent installations require proper interlacing with roof shingles (not just gobs of tar); a poorly done job will result in a roof leak.
Can I run a bath duct to a roof vent?
I ran a main bath vent to a roof vent for many years after finding the duct terminated in a previously unvented attic. I simply hung the end of the flex duct up under the vent, and did not seal it in any way. It worked fine, and was certainly an improvement over the earlier configuration, with the following caveats:
