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Chin_Lee 12-20-2007 04:24 PM

My dehumidifier is set for 50% and I find this confortable. Any lower and my RO/DI unit is going to be on all the time. I set the dehumidifier's RH to 40% last month and my hydro bill reached $120 for one month!

Delphinus 12-20-2007 04:38 PM

Quote:

Originally Posted by Tom R (Post 289260)
At what level is the humidity to high. I watch my humidity and it is always 45 to 55%. The humidity outside today is 85% and it is raining.

Tom R

It think it depends on what's normal for your area. Houses on the coast seem better adapted to dealing with humidity (maybe it's more of an "outside ambient" air issue). It's one thing if it's -5 to +5, another thing if it's -10 or lower - the outside walls just gather condensation like nuts at that point.


BTW I thought the envelopes thing was a riot! I could sooo totally see it happening too! :lol:

mark 12-20-2007 04:44 PM

Some rules of thumb to prevent window condensation during the heating season
  • Recommended indoor RH: 30 per cent to 50 per cent
  • When it is below -10oC outdoors,
    recommended indoor RH: 30 per cent

from CMHC here


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