I just gut a used 2100 from my brother. It was in the house he bought and it did not work and he replaced it with a pellet stove. I got the stove working. The original owner installed it wrong and didn't have screening on the vents. Mud daubers had a nest in the intake stopping the positive pressure fan. I want to change this over to a negative pressure system so I can burn wood or corn. I see the factory add on and the system from Sparta Coop. I am currently venting directly behing the stove. I used double walled 3" exhaust pipe that I cut slots into to preheat the incoming air and a 5" intake. The stove is located in my unattached double garage. I have read about the problems with the factory motors and the problems with useing inside air instead of outside air.

What system would you suggest and why.

I bought the one from Sparta for my 7100. The pros are because it's in the basement it requires two elbows and Nescos pipe in a pipe system would be a nightmare. I don't like the idea of Nescos electric motor outside in the weather and its a lot cheaper both in purchase price and long term maintenance. The only con I see is that its now burning inside air, but I have a fix for that i will be doing this summer.

I prefer the motor outside...keeps it quieter in the living room.

I have not had any problems with the motor being outside.