I installed a Fisher Papa bear stove in my shop this weekend, it has a 8''outlet out the back.I made an 6'' adapter to use 6'' stainless steel pipe(it was available cheap). The flue is above the ridge on the building about a foot.The heater does draw but not very well.How much needs to be added to the flue to correct the problem.Is there a rule of thumb for calculating flue height? The flue height now is 16 Ft. Thanks for ant help,
Glenn
Glenn