Designing Kitchens and Bathrooms - Bathroom Exhaust Fan
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robsid
09-20-03, 02:10 PM
I have a large bathroom 12'x13' with windows that open.
There is an enclosed toilet room 4x6' with a small exhaust fan (probably 50cfm) in this mini-room which I am sure is not sufficient for the entire bathroom. It is not always
convenient to leave the window open. Can I install a
second fan in the outer room and split it into the existing
duct of the original fan and have them both running? Or
should I just upgrade the original builder installed small fan in
the small toilet room. Would a larger fan handle the
outside room also where the shower is located?
Thank you
There is an enclosed toilet room 4x6' with a small exhaust fan (probably 50cfm) in this mini-room which I am sure is not sufficient for the entire bathroom. It is not always
convenient to leave the window open. Can I install a
second fan in the outer room and split it into the existing
duct of the original fan and have them both running? Or
should I just upgrade the original builder installed small fan in
the small toilet room. Would a larger fan handle the
outside room also where the shower is located?
Thank you
DUNBAR PLUMBER
09-20-03, 11:30 PM
I would run another fan in the big room around the size of 100 cfm and above.
Leave the one in the toilet room the way it is.
If at all possible.......I would not tie the two together; it can be done but is more work and your totally dependent on the dampers inside of each fan unit. I only tie two and go through the roof only by customer choice.
Leave the one in the toilet room the way it is.
If at all possible.......I would not tie the two together; it can be done but is more work and your totally dependent on the dampers inside of each fan unit. I only tie two and go through the roof only by customer choice.
robsid
09-21-03, 07:36 AM
Thanks for replying.... Assuming the fan in the toilet room is around 50 cfm, builder installed, is it doing anything at all or just spinning around?. Does it have any effect in the outer room?
Could I just change that fan for a larger one? and if so, if the original is a 3" duct travelling only 3 ft to the outside, can I just adapt a new fan using 4' to 3' duct adapter?
Could I just change that fan for a larger one? and if so, if the original is a 3" duct travelling only 3 ft to the outside, can I just adapt a new fan using 4' to 3' duct adapter?
dirty dan
09-21-03, 09:12 AM
The 50 cfm fan does affect the air in the larger portion of the bath (very limited if there is a closed door seperation). A higher cfm fan will just provide a quicker exchange of air in the room. (removes moisture, heat quicker)
Yes you should be able to find a higher cfm unit to install where is now. Remember that a higher cfm in the same size housing will probably be louder. Unless a code item in a commercial building, I would use reducer. 1" in exhaust hose will not make noticable difference in this application.
If you decide to install additional vent, I would go ahead and connect them on same switch, or at least add new to existing light switch. It's a pain now, but a convienence for years to come, plus any guests who use this room would probably not use seperate vent.
Yes you should be able to find a higher cfm unit to install where is now. Remember that a higher cfm in the same size housing will probably be louder. Unless a code item in a commercial building, I would use reducer. 1" in exhaust hose will not make noticable difference in this application.
If you decide to install additional vent, I would go ahead and connect them on same switch, or at least add new to existing light switch. It's a pain now, but a convienence for years to come, plus any guests who use this room would probably not use seperate vent.
Doug Aleshire
09-22-03, 09:45 PM
robsid,
You may want to take a look at this,
http://www.broan.com/support-faqs-500.asp#19
http://www.shopfnc.com/bathfan1.htm
Hope this helps!
You may want to take a look at this,
http://www.broan.com/support-faqs-500.asp#19
http://www.shopfnc.com/bathfan1.htm
Hope this helps!