Stove pipe exit--cooking

[hierony]

It looks like this is the forum section for

heating

in yurts. In this particular case, I'm looking at

heating

my food

I was thinking about the best way to cook my food. Electricity is easy & common, but only really economical if you have grid-tie with multiple circuits. I'm working off just one 15 amp circuit (100 ft extension cord, 12 gauge) so cooking can be tricky. My induction cooktop and slow cookers do well, but I want to switch to solar power eventually. The induction burner would require fairly high power, requiring more batteries & bigger inverter, etc. Plus it's only a single burner. The slow cookers will do fine on solar though (50-150 watts, 500 w*hr daily or such).

So I looked into wood cookstoves. Usually pretty big and cumbersome and expensive or really tiny (think camp/backpacking stove) without a chimney. Eventually I came across the Ecozoom Plancha--a "two-burner" rocket stove with a chimney, albeit $400. See here. At one point I ran across the figure '7.5 liters (~2 gal) water boiled 26 minutes'--pretty respectable power.

Anyhow, the thing uses 2.75" 'chimney' pipe that's up to 8 ft tall. From my reading, this is actually exhaust pipe (from motor vehicles) adapted, so I can't exactly use regular stove pipes/equipment directly. I'll be putting the stove in the middle of the yurt and running the chimney stack through the crown ring.

So the tricky part: I don't know the chimney pipe temp where it'll be going through the crown ring (it should arrive Monday and I'll start testing shortly thereafter). I'll keep the canvas away and use metal flashing to cover one of the crown ring sections. But I also want a good/decent weather seal and the lowest reasonable risk of burning things possible. So I was thinking of getting a silicone flashing boot and a 3" sealed double wall pipe section (12" or so). So it'd go: hot 2.75" chimney pipe inside 3" double wall pipe (1/8" gap ring sealed using some high-temp something or other) going through the silicone flashing boot screwed into the metal flashing in the crown ring.

Other than that, my main worry will be making sure the thing has the appropriate spark arrester and is high enough above the crown ring (3 ft).

Thoughts?