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tallycat77

03:58PM | 10/12/05
Member Since: 03/04/05
33 lifetime posts
Bvhvac
My house does pretty good during the summer months when i am running the AC, but in the winter, I have higher humidity (above the 50% mark) and am wondering what i can do to reduce. I live in a 1.5 story townhome and have considered installing a whole house air system upstairs that will pull from the first floor and exhaust to the roof. If this is dispelling air, where does the new air come in? Logistically, I don't know if this is possible, but I think I have a good chance of drawing air through the downstairs bathroom directly up and out. Any tips or suggestions? Even if I don't have to install such a thing, I'd like to work on reducing humidity during the winter months. It is not bad enough to "bother" us, but I know it is not good for the structure. Thanks!

Tally

Tallycat77

timco576

06:06PM | 10/14/05
Member Since: 10/07/05
21 lifetime posts
Forget about a home ventilation system, that is not the problem. Air that you pay to heat should not be exhausted to the outdoors anyway.Also,any air that is exhausted to the outside will be replaced from leaking windows, cracks, vent pipes, etc. That actually increases your heating bills. 50% relative humidity is a bit high in the winter time. If you have a humidifier on the furnace, check to see if the humidistat is set to 30-35%. If that is not the problem, I would bet that you are keeping the house a little too cool, or you are turning off heating vents in unused rooms etc. Colder air condenses much easier and causes humidity levels to increase. The problem will be worse on the first floor if that is the case. If you have a forced air furnace, try running the fan continuously for a while to see if it helps. This will help keep the air from stratifying. Long answer.

tallycat77

04:02PM | 10/15/05
Member Since: 03/04/05
33 lifetime posts
Timco:

Thanks for the response. I have another problem with the donstairs bathroom ventilation. There is no window in the bathroom and the exhaust fax has nowhere to go except inbetween floors! (built 1986) I believe that this humid air being released into the ceiling has cause my floorboards upstairs to warp, because they sqeak when you walk in that area. Is this too simple of an explanation? I'll have to post in flooring as well, but any tips on how to fix these sqeaky floors? Thanks.

Tally

Tallycat77

timco576

06:45PM | 10/17/05
Member Since: 10/07/05
21 lifetime posts
Are you sure the exhaust fan does not vent to the outside? If it vents into the floor space, you would be better off not using it at all. Yes, humidity will cause the floor to warp, and before long you will have mold problem on your hands as well. Also the drywall will stay damp and that is a big problem too. Sounds like the bathroom was added on later, and the exhaust fan was an afterthought. This could also be the major source of your humidity problem in the winter. Squeaking floors ( you need some good news now right? ) are not really too tough to fix. I will let the floor people explain.
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