I need to put ventilation into a bathroom which has no outside wall but will contain a shower and a bath. The extractor fan will have to drive air perhaps 10 feet before a right angle turn. I am told that moisture laden air will not condense inside a plastic pipe. Is this true? Can air from a shower room be hauled upwards without condensation problems? Has anyone any advice on ventilating bathrooms with no outside wall?
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You should only have moisture problems with ducting running through an unconditioned space. When you get to unconditioned space switch to an insulated run. It can be insulated flex or sleeved rigid but it should be insulated, the idea being to keep the heat in the pipe till it exits the house.
I concur. And installing a timer or humidistat control will further reduce the chance of condensation problems by keeping the fan running a bit beyond the time the room is occupied.
If your view never changes you're following the wrong leader
The timers a good point. Its true too many people will turn the fan off before its done its job.
I have three teenage girls that take long showers. It's not so much the fan unit, but the timer that has made all the difference. Try this web site:http://www.energyfederation.org/consumer/default.php/cPath/39_766.
I am told that moisture laden air will not condense inside a plastic pipe. Is this true?
your plastic beer cup sweats in the summer, right ?
venting through the roof is sometimes an option.
carpenter in transition
Do you have any latitude through he ceiling joists?
I agree about the conditioned/unconditioned space, but here is a trick you may want to look at:
- get the fan box as high as you can in the room
- run your vent to the outside using a slight downward slope
There WILL be moisture, that's what you are venting, right? Let it flow downhill like a plumber would run a waste line.
Quality repairs for your home.
AaronR Construction
Vancouver, Canada
Thanks for all your comments. We have been over two years at this renovation and are at the stage where we can see light at the end of the tunnel, or is it a train coming towards us??