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re: problem with winter dryness
18 nov 2004
<"dave(remove <"dave(remove).kozlowski"@shaw.ca> wrote:

>well, i have lived in northern canada for most of my life, and back in 
>my childhood days, we simply put a container of water (re coffee can) on 
>the heater, and when we got central heat (humidifiers were not 
>normally installed), placed the can on the vent in the kitchen

back in colonial days, a typical tiny us farmhouse was simply heated
during the day with 10 cords of wood per winter, before the invention
of woodstoves, insulation, and air sealing :-) 
 
>as an adult working in the high arctic we did the same thing in the bunk 
>house.  if you didn't, you woke up in the morning with split lips and a 
>mouth that tasted like the cat s**t in it....

you might have fixed that with more air sealing.

>if you want to spend a fortune sealing up your house, it will save you 
>in heating costs...

air sealing materials are cheap. labor can be cheap, if it's yours. 

>but to be healthy your going to need an air to air exchanger anyway,

or a small exhaust fan.

>and your house will still dry out if you have serious cold weather... 

how serious can it be outdoors, to avoid condensation on r8 windows when
it's 70 f with 30% rh indoors? this isn't an argument against air sealing.
condensation merely depends on indoor humidity, not the means to raise it. 

>which is why even an energy efficient home will usually 
>have a humidification system of some kind...

a need for winter humidification is a symptom of excess air leakage.

>if you live in a humid climate with out sub freezing temps, an energy 
>efficient house will require a dehumidifier...

gary points out a 44 f dewpoint will also work without a dehumidifier,
eg 60 f outdoor air at 100e^-9621/((1/460+60)-1/(460+44)) = 56% rh.

nick




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