Finally found time to spend in the forum. Still working to find someone with the proper equipment to balance the system. I did it by using a large garbage bag and timed the filling and deflating of the bag and adjusted the flow until the filling and emptying times were about the same. Seems to be working well. I can't believe balancing is not part of the business. Must not be critical in large buildings. My woodstove seems to be working fine. I put an exterior air supply on my boiler so that is now independent of the house dynamics. Hope you have had some luck.