I posted another thread ($4000 for complete P35I installation) about my concerns/questions about the need for outside air. As you all know, OAK questions are found throughout this forum. In short, my potential installer says "You don't need an OAK kit; just draw the air in from the house." The Harman manual says, "Don't forget to install the necessary OAK." I asked Harman about whether the outside air pipe has to go to the top of the chimney. This is their response:
"The outside air pipe does not have to extend the full length of your chimney. It only has to get above the damper. We recommend using the chimney top extension kit, part number 1-00-674104 at the top of the chimney, which is a slotted cover that allows fresh air to be pulled down the chimney."
Just passing this along.
"The outside air pipe does not have to extend the full length of your chimney. It only has to get above the damper. We recommend using the chimney top extension kit, part number 1-00-674104 at the top of the chimney, which is a slotted cover that allows fresh air to be pulled down the chimney."
Just passing this along.