Bathroom vents

[Dokat]

Folks need some advice. I have a100 year old house with slates that often leak so time for a new shingles roof. I also have two bathrooms in the 2nd floor right below the attic. Looking from the attic, the distance between the light fixtures in each bathroom are about 18 feet apart. I want to get exhaust fans installed as in the winter time in NYC, all the bathroom smells and moisture come into the bedroom and smog up the windows. Since I'm getting a new roof, I can choose to install a single fan in the attic that connects to both bathrooms like this https://www.familyhandyman.com/bath...n-in-line-fan-to-vent-two-bathrooms/view-all/

Or if the more reliable way is to vent out each exhaust fan in the bathroom to the attic individually, I can have the roofer create two exit points and connect using smooth walled duct. I do get a 20 year labor warranty with the roof so if there are any leaks, he will come and fix them

Here is a fantech model that has the fan in the attic and allows 2 bathroom fans to connect to it and thus quiet. However, I know the panasonic models with fan and LED light built in are pretty quiet too
http://www.fantech.net/products/fan...h-ac-motors/pbf/pb270l10-2-bath-fan-w-2x-led/

Secondly, there is quite a bit of debate for the humidity-sensing exhaust fans vs ones you turn on/off with the switch. I personally favor the humidity-sensing ones but also don't want them to go on automatically if it's a 90% humidity day and raining outside

Thx

 

[Dokat]

anybody? would greatly appreicate your advice

 

[Sponsor]

 

[Stuff]

Keep it simple - one fan and vent per bathroom. Otherwise the controls and wiring get complicated.

A remote in-line fan is almost totally silent but may not be needed as some want noise from a fart fan. Panasonic seems the brand to go to for a standard ceiling fan. Don't know about humidity sensors. Recommend using a separate wall switch with timer. That way don't leave it on accidentally but also run it a minimum time.

Figure out what you want in a fan. Light, heat, nightlight? Or just a grill in the ceiling.

Remember to insulate as you don't want the pipes sweating on the outside in the summer and the inside in the winter.

 

[Dokat]

insulate around the grill or the duct going upto the roof?

Also I've attached a picture of a roof vent which I have on top of both bathrooms. I'm guessing these are for for the fixtures since there is no exhaust in the bathrooms. Is there a way to connect to the ductwork that already exists and is that complicated - thx

 

[Stuff]

Insulate around duct in attic space.

Yes, that picture is a plumbing pipe vent. Open at the top but rain doesn't matter as it goes to the drain. An exhaust fan vent needs more of a cap as it can not handle rainwater. https://www.homedepot.com/b/Heating...-Ducting-Venting-Rooftop-Venting/N-5yc1vZc5hz

 

[Dokat]

so can I simple connect to that vent or have to put a new vent for my exhaust fan

 

[Reach4]

so can I simple connect to that vent or have to put a new vent for my exhaust fan

New vent. You cannot use a plumbing vent for an exhaust fan.