I apologize as Im sure this has been discussed before....but after alot of searching...I havent found it. Okay.....I installed my new Harman P43 a few months ago. I have a 1300sqft ranch with a big open stairway to the basement. Just finished an OAK install. Used 3" aluminum vent....a really short run of about 3 feet. Seems to work good. Did a power failure simulation running full blast......No smoke in the house. My question is ....Do you guys normally insulate the oak pipe? Seems like it would help prevent condensation.....and radiation of alot of cold air. Thx in advance for the advise!