Likely came from these guys:
http://www.pelletpros.com/id69.htmlThe mills are made in China, I was able to track down a supplier but I've since lost track of it.
I did the math and with the PP660 mill I think it would be possible to make a years worth of pellets in 48 hours or so, the biggest thing would be the feed stock. Lots of grain farming in my area and usually the farmer just leave the straw on the field so if I had my own bailer I could likely have the straw for free, the biggest factor in all of this is the time needed to collect the straw. From what I've been able to gather, straw will have less BTUs but if the stuff is free except for fuel and labour I could live with the loss.
One thing to keep in mind is that these mills need material that is 1/4" or less, saw dust would be ok, but wood chips would need to be run through a hammer mill to bring them down to size. Looked into that problem and found that mix mills / feed grinders have hammer mills and can be bought fairly cheap:
http://www.tractorhouse.com/listings/detail.aspx?OHID=5395863&GUID=3AE0AC199315474DACAF2D41DE6C6AD9I know these machine can grind up a square bale but they may not be build heavy enough for wood. Having a built in hopper is a definite bonus too.
I'm thinking about buying a pellet boiler this year after spending over $5000 on heating oil and probably another $1500-$2000 on electricity to keep the house heated last winter. Based on the calculators I've seen on some websites the boiler should pay for itself in 2-3 years provided pellet prices don't go through the roof, and even if they do a pellet mill would be my plan 'B'.
Jason