Hello all, looking for some help, the title sums it up, burning to 1500 gal storage, system is totally non pressurized, lets not hang up on that please, I have my reasons at this point, I reciently swapped this in place of my homemade boiler that had developed a leak but other wise worked great, wood is clearly less than perfect but running in the 25% MC area, this thing burns clean, gets a good nice torch, but wont get more than 12 maybe 13 degrees delta across the boiler, flue temps with an internal probe 8 inches out of the boiler collar will run from 400-650+, tubes are clean, circ is a 26-99 on any of the three speeds, true 1" id lines about 17 feet long from boiler to storage. It will burn through a full fire box in an hour to hour and half, doesn't matter what wood, a large amount of fine ash gets to the lower chamber, the thing will blow sparks and ash out the chimney outlet. with the blower running and gassing I have -.02 to -.03 water column for draft. I would sure like some input as to what in the world I have going on here, I would think the way it burns it should charge storage pretty darn fast fast but it takes forever, like 8-10 hours and 6 or seven loads of wood. please help. Thank you