Finally started up my St Croix York insert last weekend. 2200 SF contemp with cathedral ceiling. ZC fireplace in the living room with the York insert. I've been burning the stove in manual on setting 3 or 4 out of 5. The flame looks lively and reaches the top of the firebox as it cycles in relation to pellet feed. I started burning last years NEWP's that came with the stove to get a feel for how the stove burns and see how much ash and clinkers are produced. The York has 3 tiny ash pans. The one under the grate in the center fills up pretty quickly with NEWP's. I have to empty it every two bags of pellets, maybe sooner. It's about 1-1/4" deep X 5" wide and 8" deep. The center ash pan collects coarse dark ash. The two pans on the side collect a lighter colored ash and not much of it. I've been burning at a rate of 1.5-2 bags a day. (One bag per 24 hours with the stove being shut off for 9 or 10 hours or so on setting 3) We have been shutting the stove down when no one is home since it's a new installation and I'm not comfortable with leaving it burn unattended yet, mostly due to not trusting the pellet quality. I did form one big clinker in the first day. It was a little smaller than a golf ball. Last night I switched to Fireside Ultras and it was still only 65 deg when I got up. I ran it on 4 last night. Temps were in the teens last night. I plan on burning the other two bags of FSU's to see how ashy they are and if they will produce more BTU's than the NEWP's. I will also try the GT's to see what they put out for heat. This insert is very small and I'm trying to heat a pretty good sized volume. We have the bedroom doors closed upstairs so that square footage is not even being heated directly. 65 degrees ain't gonna cut it. I think it would be nice to try a hotter pellet. I have had the furnace shut off during my experiment but I will turn it back on if I can't get the house temp back up. I can get Okies and Black Hills at $6.35 a bag at East Coast Lumber but I won' pay that much. TSC has MWP blend. I am near Derry NH and I plan on buying two tons of something to get me through the winter. If FSU can't throw more heat I'm not gonna stock up. I could turn it up to 5 but I am concerned it may not tranfer all of the extra BTU's and it may just throw more out the roof. Any thoughts or suggestions? Any York owners have any input?