I've been enjoying a Harman P61 in an old drafty farmhouse for the past 4 winters. My current install is a through the wall vent with 5' of vertical vent inside the heated space. This is northern MN, a 10,000 heating degree day climate.
The existing house is being replaced by a new house that should be enclosed in the next couple of weeks. This will be a two story house on a hydronic slab with some lofty ceilings on the second floor. The pellet stove is making the move, too. I like the ambiance of the open flame and want a second backup source of heat. I installed a 4" pvc outside air source under the slab to the stove space.
That brings me to the chimney question. During a power outage, a small genny or a deep cycle battery/inverter will be able to keep the pellet stove operating for a couple days. I also have a Fisher woodstove available that would be able to keep me going indefinitely in the case of an ice storm like we had in southern MN last year (seems like the weather is getting more interesting). I plan to install either a 6" or 8" stainless steel all-fuel chimney that would have about a 21' rise through the second floor and roof. 99.5% of the time, the P61 vent would be adapted to vent into the bottom of this pipe to vent vertically through the roof. The Harman manual lists a similar option, shown in the attachment below.
What size stainless chimney should I be looking at? The entire flue run will be inside the heated envelope of the house till it passes through the roof. The Fisher has a 6" flue outlet. Due to lots of glass on the south side, a through the wall vent for the pellet stove isn't an option.
The existing house is being replaced by a new house that should be enclosed in the next couple of weeks. This will be a two story house on a hydronic slab with some lofty ceilings on the second floor. The pellet stove is making the move, too. I like the ambiance of the open flame and want a second backup source of heat. I installed a 4" pvc outside air source under the slab to the stove space.
That brings me to the chimney question. During a power outage, a small genny or a deep cycle battery/inverter will be able to keep the pellet stove operating for a couple days. I also have a Fisher woodstove available that would be able to keep me going indefinitely in the case of an ice storm like we had in southern MN last year (seems like the weather is getting more interesting). I plan to install either a 6" or 8" stainless steel all-fuel chimney that would have about a 21' rise through the second floor and roof. 99.5% of the time, the P61 vent would be adapted to vent into the bottom of this pipe to vent vertically through the roof. The Harman manual lists a similar option, shown in the attachment below.
What size stainless chimney should I be looking at? The entire flue run will be inside the heated envelope of the house till it passes through the roof. The Fisher has a 6" flue outlet. Due to lots of glass on the south side, a through the wall vent for the pellet stove isn't an option.