Fabs congrats on the potential new home.
Harman has some good products:
http://www.harmanstoves.com
I don't know about other brands but Harman pellet stoves take 3" pipe for venting.
This might be a good unit for you:
http://www.harmanstoves.com/products...8&nav=overview
We have this pellet stove installed with a straight section of 3' pipe right out the side of the house:
http://www.harmanstoves.com/products...oves&f=ACCPSTV
We wanted a woodstove but since time is valuable, we opted for pellets instead of having to cut, split and stack wood.
We are not disappointed and its the main heat for our home.
Two drawbacks for pellet stoves: You need a generator to power it when the electric goes off and you rely on someone else for the fuel.
For this season we will have spent only $935.00 for our heating needs. Thats 5 tons of pellets.
I grew up with coal and wood and the pellet stove is fairly clean thanks to the negative pressure design.
Cleaning is usually performed once for every ton of pellets burned and the firepot gets the clinker scraped every other day.
Check out this forum for more info on pellet stoves:
http://www.hearth.com/econtent/index.../viewforum/22/