1. Welcome Hearth.com Guests and Visitors - Please enjoy our forums!
    Hearth.com GOLD Sponsors who help bring the site content to you:
    Hearthstone Soapstone and Cast-Iron stoves( Wood, Gas or Pellet Stoves and Inserts)
    Caluwe - Passion for Fire and Water ( Pellet and Wood Hydronic and Space Heating)

Low Temp Humidification

Post in 'The Boiler Room - Wood Boilers and Furnaces' started by wdc1160, Jan 20, 2008.

Thread Status:
Not open for further replies.
  1. wdc1160

    wdc1160 New Member

    Joined:
    Dec 28, 2007
    Messages:
    356
    Loc:
    Lafayette IN -BoilerMakerCountry
    The new house has 6 zones. I don't spend my time in more than three zones a day. Half the of the day I work and don't spend my time in any of the zones.

    When I arrive home I turn up the heat from 60 to 70 in zones 1,2,3. This plays hell with the humidity.
    I have the a very capable humidifier, but I am afraid during the extraordinary low temps like now the condensation on the woodframed windows will destroy the surrounding wood work.


    Interested in how others address the condensation on the windows problem? Us boiler guys should have it harder than most.

    Helpful Sponsor Ads!





  2. Reggie Dunlap

    Reggie Dunlap Feeling the Heat

    Joined:
    Dec 13, 2005
    Messages:
    314
    Loc:
    Northern Vermont
    If you have window condensation at moderate temps it's probably an indication of too much moisture. At cold temps, below zero, you may have condensation even at low humidity levels. I'd buy a humidity measuring thingy or use a humidistat with your humidifier. Aim for around 40-50% relative humidity.

    Hope this helps.
  3. wdc1160

    wdc1160 New Member

    Joined:
    Dec 28, 2007
    Messages:
    356
    Loc:
    Lafayette IN -BoilerMakerCountry
    Covered it Reggie. I forgot to include it in my orginal post. I keep the house at 40% relative. But, I change the temp in the house to conserve energy. 60 by day. 70 by night.
    The three zones that don't ever get above 60 act as dehumidifiers, because the colder air doens't hold much mosture when the warm wet air hits it. It just gathers on the rooms coldest spots like the windows.

    Even so, even in the warmer three zones humidity gathering during downtime could be a problem -- likely is.

    I only humidify the rooms I want to have heated. So I never purposely expose the colder rooms to moisture. I am sure they steal it from the warmer rooms.
  4. wdc1160

    wdc1160 New Member

    Joined:
    Dec 28, 2007
    Messages:
    356
    Loc:
    Lafayette IN -BoilerMakerCountry
    I think a simpler way to say this is during real cold weather how do you prevent condensation ont he windows.

    Thanks Bill
  5. pbvermont

    pbvermont Member

    Joined:
    Nov 16, 2007
    Messages:
    44
    Loc:
    northcentvermont
    Insulate your windows and reduce the humidity.
  6. wdc1160

    wdc1160 New Member

    Joined:
    Dec 28, 2007
    Messages:
    356
    Loc:
    Lafayette IN -BoilerMakerCountry
    How do you insulate a window??

    I think I have humidity at the bare minimum 40%.
  7. Gagz

    Gagz New Member

    Joined:
    Jan 14, 2008
    Messages:
    11
    Loc:
    Rush City,Minnesota
    Here in MN it has been code for quite sometime to have a heat recovery ventilator also know as an air exchanger . The exchanger control has a chart on it for outside temp and humidity setting for in the house .

    Outside temp % humidity
    55 F 50
    32 45
    15 35
    -5 30
    -20 25
  8. wdc1160

    wdc1160 New Member

    Joined:
    Dec 28, 2007
    Messages:
    356
    Loc:
    Lafayette IN -BoilerMakerCountry
    are u telling me that when it gets down to -20 I should have my inside humidity at a relative 25%?

    Right now its 15 and I have humidity of 39%. Am I violating MN law.

    Hehe
  9. Gagz

    Gagz New Member

    Joined:
    Jan 14, 2008
    Messages:
    11
    Loc:
    Rush City,Minnesota
    Not violating MN law...hehe . I was at -17 this morning and I checked the humidity in the house and it was at 27% . I had just a slight bit of moisture on the base of the windows that were shaded all night . This tells me that I have it set pretty good .
  10. pbvermont

    pbvermont Member

    Joined:
    Nov 16, 2007
    Messages:
    44
    Loc:
    northcentvermont
    The shades were in effect "insulating" Gagz's windows.
    Storm windows are another way to "insulate" windows.
    The only "laws" you have to worry about violating, are the laws of physics.
Thread Status:
Not open for further replies.

Share This Page