Hi! First Post! We have a couple concerns before we can buy a Wiseway Pellet Stove. We will be replacing a Bixby stove and using that chimney. 1) The existing chimney is 3” surrounded by 5” double walled construction. The existing vent goes through a SuperiorWall concrete wall and out the side of the house. The Wiseway would have a straight of 2.5 feet and then a 90 to the outside- then there is another 3 feet of chimney, most of it outside, to the cap. Would this configuration work? It will be less than the 8 feet vertical straight I’ve read about, and it terminates horizontally. 2) We have orange radiant PEX in the concrete floor and internally aluminum shielded black tubing in the ceiling for the second floor. We have a blue PEX water line coming into the house in the wall behind where the Wiseway will be situated. I’m concerned about PEX melting. How much heat will the Wiseway radiate in all directions? The ceiling is 9’3”. 3) Our house is an Enertia Home with a vent of air coming from the attic space. Would we need an additional outside air input? The outside two inches of the existing pellet stove pipe served this purpose for the Bixby, but I don’t see how this could help with a Wiseway, other than providing some small buffer from the chilled air. And we will have to figure out how to seal that part of the tubing too, or have a continual draft. Any ideas? I suspect GreatStuff would not be heat tolerant close to the stove, but could seal it outside. Thank you for your advice. I did call USSC but they do not have figures on temperature readings in the vicinity of the stove.