Hammer8 wrote:Are you burning corn, wood pellets, or both? Wouldn't there be any concern for creostoe build up on a venting unit burning pellets? I don't have any experience with either.
Both - separately and mixed - The corn products of combustion are cooler and "stickier" they foul even the SS2 impeller quickly.
Another testimonial for draft proof on any solid fuel appliance
Pellets burn drier and hotter and the impeller is able to "spin off" the soot. So when burning straight corn I find myself pulling the PV guts twice a weeks and marching the contraption outdoors to clean it with Hi pressure air. But thats a silver lining for me - I couldn't clean my 40 foot tall chimney in the same time!!! I stand safely, with both feet on the ground, at all times, for all vent related drama. I just need to extend care to my PV a bit more often than if my appliance were on a chimney - when burning straight corn - so I get around that by burning at least equal portions of corn and pellets - or straight pellets - as corn has increased in price to make pellets now the "cost effective fuel" with the equipment I currently have. The mixed fuel or straight pellets make products of combustion temps regularly above 275 degrees and that also is a key to keeping the PV clear.
AS you may have noted is some of my other posts I am trying to figure out if I can correct that fuel choice oversight.
If I can find a stoker engine to repower my corn/pellet boiler (or sell this one and find a replacement) I will think very seriously about moving it to my chimney and power venting my NG backup boiler as I think I can brush my chimney with a snake from the basement to daylight - but thats a topic for another thread. Today I wouldn't PV anything but the Harmon appliance as it appears to be higher tech - could benefit from a constant consistent draft - and is sized that the SS2 should be able to handle it. Thats another concern you will need to watch - the SS2 - one of the only affordable (residential) impeller style PV's - will not be big enough for many other choices.