mark viii wrote:
coal burner wrote: Heating season is 2 to 3 hrs a 24 hr run per day 36 minutes of that is on timer alone The balance is heating 3140 sq ft of house at 70 to 74 degrees between two heating zones this year will be three zones
That is very impressive. Is your house in town and/or surrounded by trees? Wind exposure can make a huge difference in heating load, and I'm wondering if that has something to do with your exceptionally low coal consumption.
My house is a 1948 coal ash cinder block house Ranch 1640 sq ft upstairs 1500 sq ft basement with a unfinished Attic
with old celsius insulation blown in between floor joist's no other insulation in house The house in on a hill in a valley
I heated this place with hand fed stove for years using oil boiler for DHW I used the same amount of coal per winter
that I use now all year I am not doing anything special with the efm it is the way they are if they are set up and sealed
correctly well there is five things I do different from most set ups I only use one return port the other side is plugged I use a loop of supply line down to return right at the port for mixing hot water with the cooler return water a ball valve is at top of line.
Two I use # 1 Buckwheat size coal and never had to replace any shear pins if you read post or talk to people who have efm 95 % of them that break shear pins are using rice coal I do Not Use Rice size /Buck # 2 & Three My 8" stack pipe goes into a 6" chimney liner reduce at thimble. Four my auger tube is S.S thin wall pipe . Five I do not piggy back efm to oil burner water coil or boiler It is on it's own. I have 11 Rads and 90 ft of baseboard copper finned 3/4" 60 ft of 1 1/4 "
supply line into 200 ft of 1" copper pipe feeding Rads another 200 of 3/4" copper pipe feeding baseboard 230 ft of 1/2 " copper pipe going to rads and hot & cold water lines.
Now most if not all efm's should be getting the same or similar numbers if not look into set up & piping and make sure everything is sealed that is suppose to be sealed up.