Long time lurker, first time poster.... 2 related questions about using a barometric damper with a wood furnace: #1: I'm currently awaiting a finished installation of a wood furnace. The installer doesn't think a barometric damper is necessary because he's never installed on on a wood stove before. In the manual for my furnace, it mentions that a barometric damper is only necessary outside a particular range - 0.04 to 0.06. Let's say he measures it within tolerance on the day of install, which is a non windy day. Without a baro, isn't the draft going to extend outside that range on a 20-25MPH windy day?! (~6' of 6" double wall exhaust with 3 bends to a ~24' of 6" class A, AKA not a really short chimney) I've never taken draft measurements myself, so I don't know how easily it fluctuates, but it would seem as though the wording in the manual should state that a baro should be installed to reduce the variable effects of the temperature and wind, doesn't it? Should I be concerned and install a baro even if it's within tolerance on the day of installation? #2: So let's say I purchase one to have installed besides his previous wood-fuel appliance experiences, does the 'T' need to be between the furnace and the class A stack, or could I 'T' off the back of the furnace with the exhaust to the stack on one end and the baro on the other, provided that it's a sealed system with the exception of the stove/baro/stack? (Hopefully this second question makes sense). To add some background, the exhaust between the furnace and the stack will be on an angle for a good portion of it, having a 90 and a couple 45s, so if incorporating a baro should be done, it'd be easiest when it's being installed rather than having to possibly reroute the piping at a later date.