Rob it was so hot in the boiler room i had to use a rag to open the door on the unit. I was absolutly impressed with the output of the unit. It was making all the hot water a a large dairy farm to wash lines and bulk tanks with. You could have forged steel over it. The whole time I was there the stoker never shut off (over 30 mins). I was amazed at the output . I will try some pics. I have to go back there this week.
I'm glad you got to see one in action, those stokers are "big medicine". That farm is very smart to use anthracite to produce hot water. Most people have no idea how much hot water a large parlor requires.
I did not look to see what size milk line they have. It is a 1200 cow dairy with a carasell parlor. The indirects and the boiler were plumbed with 2" pipe and the boiler water was only at 160 both times I looked at it running WFO. I wonder how long the water side can take that it has been in service over 4 years all ready. The heat it is making is absolutly amazing.