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re: furnace humidifiers; was re: not needed--pyjamas
21 dec 2001
mom wrote:
>our house has been caulked into oblivion and back. by simple design,
>even opening a door will permit air leakage, so our house is not air tight.
some people measure air leakage in cfm vs oblivia, and close the house doors
in wintertime.
>obviously, you do not live in an area where additional humidification
>is necessary.
a lot of my neighbors believe it is necessary. they are wrong.
>central heat is notorious for drying out indoor air.
sounds like another mcfl energy myth.
>...our natural gas company includes a flier at the start of the heating
>season reminding their customers of the benefits of a humidifier...
would they, by chance, be in the business of selling energy?
would they sell less, if you caulked your house?
>...the air simply gets too dry with the natural gas, central heating.
>the moist air is carried to the furnace and heated where it does lose
>some of its moisture content.
how would that happen in a closed system in which cooler room air enters
one end of a sealed heat exchanger and the same air exits the other end,
warmer? do you believe that condensation occurs in that heat exchanger?
i don't. maybe you're saying the gas furnace draws combustion air from
inside the house, which makes a vacuum that draws outdoor air in through
cracks in the house. that's an air infiltration problem which might be
fixed with a separate combustion air inlet and more house caulking. imo,
it has nothing to do with "central heating," or "forced air heating."
>you know the little property of water evaporation?
sure. start out with liquid water, and end up with water vapor.
>it happens right in the furnace...
really? where does the liquid water come from?
would you care to explain further?
nick
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