Tedward wrote:This is my 1st season heating with coal. Keeping the house at 69-70 deg, I consumed about 3 ton for a 2375Sqft house. The CoalTrol is perfect for the Alaska 140 auger. I have the min setting at 5 and the max setting at 47. I use an Alaska powerventer and their Hilki coil to heat hot water. When this stove fires in cold weather it provides almost endless hot water. In-order to keep the water temperature to 140deg I installed a Watts 1170 hot water mixing valve to cool it by building an induct hot water radiant fined tube to cool the water down into the cold side of the mixing valve before returning to the hot water heater.
I want to thank Paul from CoalTrol for his support. I hope they make auto light for this unit.
I was looking at emails and Paul asked for details of the operation. To date:
Started with min/max setting at 8 and 72 with draft at .02 inchs of water. At 72 the discharge air plenum was 160 deg (similar to the oil burner) and easily and quickly heated the house.
I durning the coldest windyest months set the max to 56 and found house temp easily maintained the 69 deg setting, while not using a lot of coal.(fill hopper every 3.5 days) Discharge water temp 180deg (thats why the watts 1170 mixing valve and the radiant fin tube inserted in the cold air return duct to return it to 140 to the hot water heater) (family burn safety).
As spring warms, I'm adjusting the min and currently have the min at 5 (will try 4)with draft at .02 inchs of water and when not calling for heat can lay my hand on the door glass as it only feels warm. (fill hopper 7-9 days) depending on how cold the nights are.
The Hilki coil performance depends on the fire rate of the stove. It at least on the low burn setting maintains the 120deg set point and durning higher fire adds longer hotter water, while not using electric. bottom line higher stove rate means lower electric use.
This is my 3 season with the Alaska140 and the CoalTrol. Both continue to operate flawlessly. I really like the burn with the Alaska. It just completely burns the coal, no unburnt coal yet... also I tried Blashak coal vs Stockton. I attached a picture of the burn. note the color of the spent coal. The Blashak is the lighter color to the left of the picture. and the Stockton is the more red color towards the front of the picture. For me all I can say is the Blashak burns cleaner,longer and hotter, with less ash. Almost if the Alaska was meant to burn it.