Sting wrote:coalkirk wrote:I'm heating 4,000 sq. ft. with the Harman VF3K. As far as how often to tend it, I loaded the hopper on Sunday morning with 250# of coal and I just had to tend it tonight. Granted we did have some warm days this week. The hopper still had probably 30# of coal in it.
I was just reading again the size of load
4000sq feet? My load is just a bit larger and my 130,000 rated (inflated) appliance struggles with it. The Harmon must be very efficient or is your house well insulated?
My house is very well insulated and all new windows. My system is also alittle unique in that I'm using a water to air heat exchanger at a relatively low water temperature. I run the air handler all the time with the water tempered at about 100 degrees. It puts out a constant temp of around 80 degrees which keeps the house nice and uniform. Not a system for everyone but works well for me. If it gets really cold, I crank up the water temp in the heat exchanger. (with a tempering valve). I run the coal boiler at about 140 degrees. That has turned out to be the key to greatly reduced coal consumption, that and a properly set baro.