Most of the talk on here about how different pellets perform pertains to pellet stoves rather than pellet boilers. It seems like there are a fair amount of people here now that have made the investement in pellet boilers. I'm curious what other pellet boiler owners have experienced as far as different pellets performing differently and whether or not the higher cost of some pellets can be justified as most stove owners seem to think it is justified. Can you please list your pellet boiler make/model, the different pellets you've burned and any differences you've noticed? I have a Windhager Biowin and so far the only two pellets I've burned have been the MWP blend and Boundary Bay Blend. I only burned a few bags of the Boundary Bay. They were a horrible pellet. It seemed like every bag had moisture infiltration and I think this is what lead to seeing many pellets that were not even burned a quarter of the way through. I'd see a thin coating of black ash over a pellet that was 50% intact or more in my ashbin over and over. Having burned about a ton of the MWP pellets blend I can see that it is a much better pellet. The ash is a very fine greyish brown and there are no unburned pellets at all. The MWP are not the most expensive but they're also not the cheapest in my area. Home Depot carries the Fireside Ultra which I've read good things about. I will be burning some of those soon to see how they do. In addition to the ash I'm going to attempt to track the temperature/weather over a period of time and correlate it with the amount of pellets used for each different pellet.