Hi everyone. I have a Harman Accentra 2 I picked up used last week and am ready to hook it up to my existing 3" vent. I have an 18" section of pipe that leaves the stove and goes outside to a clean out t, then up six feet to a 90 then to a cap. I'm using Duravent pellet vent, the cheaper stuff not the Pro with the gaskets. My question is do I need to silicone every joint, even the ones outside to keep the soot out of the house? I installed a special Harman connector on the back of the stove which replaces the cast exhaust connector that comes on the stove from Harman. This connector twists and locks right into my Duravent pipe system. I am planning on not sealing this joint inside with silicone as I want to be able to undo it to clean. I am planning on taping this joint with aluminum tape. Do you guys think I'll be able to keep the soot from getting in the house? Thanks in advance.