I fill my stove only once a day, but its takin me a long time to get to this point. I think the biggest problem alot of you are gonna find is that your cold water returns are some what recycling right back where the pumps draw from. Those cold water returns need to be the farthest away from where your pumps draw from and Shaver just has them stubbed into the back and claim the pressure from the pumps will shoot all the way to the front of the stove. If your furnace kicks on and then not to long after that your fan for the boiler kicks on then your not using all the available heat out of the stove. My stove keeps up with only loading it once a day until its gets below 20*. It is inside a woodshed and heats a house 2000sq. foot but also runs to a unit heater in my shop that I dont use cause its not insulated. So its like I'm cycling it thru a freezer and I probably would be better off if I just did away with it but I use it on occasion. It has the Ranco, blower mod with the 75cfm fan, cold water pipes running to the front, rear top opening plate is not there as I did away with that when I had new top and bottom steel replaced and it sits on top of concrete blocks for much easier loading with all new insulation including the bottom. It also has 12 foot of double wall chimney pipe. Using a 5" to 6" adaptor (about $5) fit right inside the chimney and hooks up to the 6" pipe.