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Vent on outside of chimney?

Post in 'The Hearth Room - Wood Stoves and Fireplaces' started by Skitheeast, Nov 15, 2012.

  1. Skitheeast

    Skitheeast Member

    Sep 25, 2012
    Good morning,
    We are picking up and getting ready to install, (DIY), our HI-300 insert. My question is that we have a louvered vent on the exterior of our masonry chimney. I am assuming that it has to do with outside air and the drafting of our regular fireplace. The bottom of our firebox has the sliding cast iron vent / cleanout that I have used to regulate the fire with. Should we be doing anything with this and the outside vent before installing the insert? We will be installing a block off plate per recommendations on this site.

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