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i am confused. replacement air

Post in 'The Hearth Room - Wood Stoves and Fireplaces' started by outcast, Nov 18, 2012.

  1. outcast

    outcast New Member

    Joined:
    Jun 24, 2012
    Messages:
    46
    i am planning my stove installation. i had thought that ducted replacement air was needed for best efficiency. as otherwise, the stove would suck heated air out of the house = much like a regular fireplace does. but i was reading on the web, that that is not the case.

    but, the stove does use air from the house, and moves it out the chimney. how is a stove better than a fireplace ?

    idk if i am asking my question properly. i am concerned about replacement air.

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  2. begreen

    begreen Mooderator Staff Member

    Joined:
    Nov 18, 2005
    Messages:
    46,587
    Loc:
    South Puget Sound, WA
    The need for an Outside Air Kit will depend on the installation. There are arguments for and against adding an OAK that go on for pages. If the house is very tight or the stove is located in a area like the basement where there is negative pressure, then an OAK is a good solution. It's also required for new installs in WA state. Here's a good article on the topic:
    http://www.chimneysweeponline.com/hooa.htm

    Also, for more general info here is a collection of post links that may be helpful:
    http://www.hearth.com/talk/threads/...lem-stoves-air-is-restricted-faq-about.59225/
    Billybonfire likes this.
  3. HotCoals

    HotCoals Minister of Fire

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    Rochester,Ny.
    The diff between a fireplace and a stove is huge..nowhere has much air sucked out of a room with a stove.
  4. Slow1

    Slow1 Minister of Fire

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    Eastern MA
    It really is simply a matter of volume. An open fireplace will pull a tremendous amount of air up the chimney compared to a wood stove. Although the air being pulled from the stove is in fact from the house, the amount of air generally isn't significant compared to how much you normally leak and otherwise lose through opening doors etc. Just consider how much you suck out of the house when you turn on a bathroom vent for a while as an example.

    OAKs (outside air kits) are necessary when you have an unusually 'tight' house - one that doesn't have enough leaks to equalize the air pressure. This leads to the stove not being able to draw up the chimney and thus not burn well. Although there is considerable debate over whether or not they are helpful for general use, it is relatively rare that houses are so tight that you MUST have one installed to operate the stove.
  5. outcast

    outcast New Member

    Joined:
    Jun 24, 2012
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    ok, i think i got it now = a fireplace sucks up way more air than the fire itself needs. a stove sucks up only the air needed for combustion. correct ?
  6. Slow1

    Slow1 Minister of Fire

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    I believe that is a very good summary.
  7. outcast

    outcast New Member

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    Jun 24, 2012
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    again = thanx guys :)

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