Vent on outside of chimney?

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

  1. Skitheeast

    Skitheeast
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    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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