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Posted by on December 21, 2006, 10:19 am
>> I'm looking for suggestions on what home humidifier to get.
>
>nicksanspam@ece.villanova.edu wrote:
>> Don't. Airseal the house instead, to raise the indoor humidity and lower
>> vs raise your fuel bills.
>
>BUZZ! I'm sorry, that's completely the wrong answer...
Ignorance can be cured :-)
>#1: In many areas of the country, the humidity level goes down during
>the Winter.
The absolute amount of water vapor in colder outdoor air is less.
>#2: If USGuy has a forced air heating system of any kind, heating the
>air then dries it further over time.
Wrong. Heating air does not change the moisture content at all.
>Sealing the air into the house only ensures the already low humidity
>level will go down.
Wrong. Houses contain humidity sources. Andersen says showers, cooking,
breathing, green plants, and so on add about 2 gallons of water per day
to house air for an average family of 4. In a perfectly airtight house,
the RH would keep rising until condensation occurred on the coolest
indoor surface, eg a window pane.
>#3: If USGuy lives in an older house with a gas-permeable foundation,
>you've now told him to raise the radon levels in his house without
>cautioning him to have a radon test done periodically...
Radon tests and fixes are good.
>I will say your suggestion is valid for lowering heating costs...
... while naturally raising the indoor relative humidity.
>BUT, I hope you're not an engineering student at Villanova. Whatever
>your major, if my cousin in Downingtown ever sees this post, on behalf
>of 'Nova alums everywhere she's gonna find you and whup you upside the
>head for embarrassing the school.
Sounds like fun. Send me her phone number.
Nick
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