it will now hold 140 degrees at night but still not happy with it..
Does this mean it is running all night and only holding 140 or is it getting up to 140 and shutting down?
Does this unit have the Johnson controls on it? I had to remove mine. For anyone that wants them by the way, I'll will sell them cheap. 2 dump controls
If you don't have the same flame, there is still is not enough air getting under the coal or it is lousy coal.
Even when it was brutally cold out and the wind was blowing, mine would eventually catch up and shut off at whatever temp I set it at. Usually 180 to 195.
Having said that, my system had an aquastat that changed the flow of water to the gas boiler and allowed it to fire and the coal to catch up. Maybe mine would never have caught up either. BUT, this was before I learned about reducing the flow of water to allow only enough out to satisfy the demand and giving the coal some time to ramp up. I think the famous Sting(not the singer) would call it balancing the system.
Your supplier told you it would heat the house, and maybe it will. But Btu's are funny things with coal. It will produce a bunch and it is probably underrated at PEAK output, but oil and gas are "instant on" btu's, the coal takes quite some time to get up to maximum. This is the problem with bed type stokers.
SO, if you have not cut down your flow yet, I would advise some pictures and the pro's in here, not me, will tell you things about your system you didn't need to know very likely.