It looks like I might be finally able to add OAK's to my two BK Ashford 30's. Those who've been on this forum more than a few years already know the setup, two BK 30's pushed into walk-in fireplaces, the entry point is thru 22 inches of mud-stacked granite and red shale.
The stoves sit less than a foot off the rear wall of the fireplace, so total duct length will be very short, essentiall wall thickness plus a foot, with an elbow up into the stove's adapter. I bought a 3" OAK adapter plate, which BKVP said something like "should be fine for your short run", so it sounds like there's at least some chance I might need to up-size to 4 inch later.
The primary quesiton comes down to what size core drill to purchase for this penetration, which is obviously going to depend on the type and OD of the duct to be used, relative to a given nominal size (e.g. 3 inch or 4 inch). What type of duct is typically used in these OAK's? Given my mud-stacked stone wall construction, I'm going to want to favor something that's heavier and stainless, as we've seen too many other galvanized penetrations rot thru in the past, and the potential for shifting inside mud-stacked stone walls is higher than for modern walls with cement bedding mortars.
And then there's the connections to and exterior finishing of. Looking for some sort of rain hood that will look reasonably acceptable on exterior stone walls.
Specific duct product recommendations?
The stoves sit less than a foot off the rear wall of the fireplace, so total duct length will be very short, essentiall wall thickness plus a foot, with an elbow up into the stove's adapter. I bought a 3" OAK adapter plate, which BKVP said something like "should be fine for your short run", so it sounds like there's at least some chance I might need to up-size to 4 inch later.
The primary quesiton comes down to what size core drill to purchase for this penetration, which is obviously going to depend on the type and OD of the duct to be used, relative to a given nominal size (e.g. 3 inch or 4 inch). What type of duct is typically used in these OAK's? Given my mud-stacked stone wall construction, I'm going to want to favor something that's heavier and stainless, as we've seen too many other galvanized penetrations rot thru in the past, and the potential for shifting inside mud-stacked stone walls is higher than for modern walls with cement bedding mortars.
And then there's the connections to and exterior finishing of. Looking for some sort of rain hood that will look reasonably acceptable on exterior stone walls.
Specific duct product recommendations?
