Well, I was a bit stupid when I allowed a dealer to install an old Whitfield Quest insert into a basement office fireplace without an OAK. It works perfectly, with about 25' of stainless steel venting up the chimney, BUT I'm burning air that we've already heated! And I know better! I was simply looking at the cost of the extra piping up the chimney, and listened to the dealer who said, "Don't worry about it". So, now I'm thinking about installing an OAK... I would rather NOT do that using the pipe up the chimney method, though, as I'm no longer comfortable working at heights and the dealer wants a fortune for the install (plus it would require the cap to be modified, etc.). I know I could tell the dealer that he should have "done it the right way", but let's get past that, friends - I need to find a solution. I'm thinking of simply drilling through the chimney, either from the back or the side, but that's a 3-inch hole through the chimney (stucco and block). Has anyone done this on their own? Did you just drill through with a hammer drill or did you use a coring contractor or rent a special corer to make the hole? And more importantly, the Quest was never designed for an OAK to the best of my knowledge. Has anyone ever connected one, and can you offer any advice?