Will my toilet sweat?

[Jechow]

I'm remodeling my ensuite and will need replacing the vanity. Currently the forced air supply comes up into the bottom cavity, fills the cavity and then passively comes out. With the replacement vanity, I'm planning to extend the pipe so that it's attached to a register on the kickboard. If I extend it next to the toilet (because it would be shorter than running it to the front) will the toilet to sweat? With the current setup, the toilet doesn't sweat.

 

[Sylvan]

That would depend on the ambient temperature and humidity

 

[Sponsor]

 

[Jadnashua]

If you have central air, I'd think twice about pointing it towards the toilet...sitting on a refrigerated toilet is not he most comfortable thing, but might wake you up! On the other hand, it might make it more pleasant in the winter when it's heating it.

 

[Dana]

During the cooling season the exit air will be drier than the average air in the house, with a dew point below the water temperature that fills the tank. The risk is pretty low.

During the heating season the furnace exit air has the same dew point as the rest of the air in the house, and the water filling the tank could be colder than that dew point, but not by a lot.

The tank can sweat when air in the bathroom is much higher than the average air in the house (say, during a shower), but the cause would not be the location of the register.

If the furnace is not a condensing type, with a higher than average register temperature the wax seal on the closet fan could conceivably melt. But it the air was that hot the toilet would be uncomfortably warm too.

 

[hj]

If the water temperature in the TANK is below the dew point of the air it will probably sweat. The ambient air temperature has little to do with it.