Sailfish: WNY has an excellent point about being to tight, mold etc. We restored a 1860's farm and added an addition to it inthe Laurel Mtns. of Western Pa. After "gutting" the entire structure added R 30+ to the attic. The walls on the second floor have 3-4" of Foam sprayed in, with housewrap outside, a then layer of 1" tongue/groove insulation over the outside
walls, covered with vinyl siding. First floor about 1/2" spray insulation, additional fiberglass in walls and outside the same-
housewrap and then tongue and groove styrofoam. Except for days in the 20's and below the 354 is barely working -front vents closed atutmatic damper only and fan off. The rear autovent is open maybe 3 x 1/2", as someone mentioned a 6"
fresh air pipe will be oceans of combustion air .. if you have not already purchased the 354, look at the Hitzer models that
have a gravity hopper and independent shaking on the grates ..... you are going to have a lot of heat on 40 & 50F days. You may only need one side of the firebox, I have seen some on this site disconnect part of the linkage on their stoves during warmer weather; I plan to use just one side of my 503 this spring. it has two separate grate handles so should be quite simple. Good Luck, baldeagle