The place I bought my stove at will be installing my stove tomorrow. It's a hearth install, so rear exit from the stove, 90 degree turn then straight up 25' of chimney. They plan on running 25' of pipe, and I'm almost 100% sure it's single wall pipe. I know this would be a bad idea if the pipe was exposed. Is it ok to do with the chimney providing additional insulation from cooling too much as the exhaust rises? I'm worried about creosote and how the draft is going to behave.