I would like to ask a follow up question on this topic. I'm using Olympia single wall Ventis black stove pipe, 34 inch vertical run from stove collar to 90 degree elbow, 24 inch horizontal run from elbow into a 6 inch insulated Rhino Rigid liner. Chimney is 32 feet. Draft seems exceptionally strong, need to install barometric damper, I've also purchased the Dwyer Mark II manometer which I'll be installing shortly.
My question is,, can I install the barometric damper, a 6 inch Field Control RC, in the horizontal take off section of a Ventis Tee, direcly below the 90 degree elbow in the vertical section?
I see little difference between installing the baro in this manner and the integrated Tee/Baro product sold by Field Control: http://www.patriot-supply.com/products/ ... S_02722704
I've spoken to Olympia, they told me that they can "bump out" the horizontal take-off section so that the baro can be installed. I'd like to avoid cutting a hole the existing vertical section for the damper and collar, as I'm using the adjustable telescopic pipe. Thinking that using a Tee below the elbow would be easier than hacking up the existing vertical pipe or using a different brand of pipe other than the Ventis.
I would also be shortening the horizontal take-off section of the Tee by an inch, in order to maintain the same spacing that I would have if I cut a hole in vertical pipe and used the collar that comes with the damper. Any comments or suggestions?
Another question, slightly off topic, is there any advantage of using a larger barometric damper to control draft? Using a 7 or 8 inch damper on 6 inch appliance and pipe? I will know more about exact draft numbers when the manometer is installed, but draft seems very strong, wondering if l should use something other than the 6 inch baro for my situation. Stove is a 6 inch flue.