Van Wert Simplex Multitherm Bit to Anthracite

Van Wert Simplex Multitherm Bit to Anthracite

PostBy: Matt328 On: Mon Mar 24, 2014 11:20 pm

I have a simplex multitherm and have been burning bit in it pretty successfully for 2 winters now. I'm really familiar with the equipment but I'm tired of the sooty mess, both inside the boiler and outside in the yard, so I want to transition to anthracite. Being almost the end of the season I'm going to pick up a few bags to try out before I go all in and have a few ton delivered.

I've got an 8 inch flue and a tall, about 25ft SS lined chimney. There's a BD on a horizontal section of the flue. If you're not familiar with my boiler model it has a mechanical draft damper connected to a water temp/pressure sensor, and I have a dump zone with two big ol cast iron radiators configured to dump at about 195 degrees. It rarely ever dumps unless there's a huge temperature swing and I haven't been paying attention to the forecast.

Is there anything I need to watch out for while I'm adjusting to hard coal? What is the most effective way to fire hard coal, do you still have to bank it up, or do you just pile it on? What size do you guys recommend? Does it need as much over fire air?

I know every appliance setup is different and there will be alot of trial and error involved, but any advice on burning anthracite safely and effectively in a hand fired boiler would be greatly appreciated!
Hand Fed Coal Boiler: Van Wert Simplex Multitherm
Coal Size/Type: Large Bituminous
Other Heating: Mendota Propane Stove
Stove/Furnace Make: Van Wert
Stove/Furnace Model: Simplex Multitherm

Re: Van Wert Simplex Multitherm Bit to Anthracite

PostBy: Rob R. On: Tue Apr 01, 2014 5:38 am

Matt, anthracite doesn't need much air over the fire, but it is a good idea to give it some after reloading to help burn off the gasses. You don't need to bank it as aggressively as bituminous, but you should leave some burning coal exposed to prevent a buildup of gasses in the firebox. I would experiment with nut and stove size.
Rob R.
Stoker Coal Boiler: EFM DF520
Hand Fed Coal Stove: Hitzer 50-93
Coal Size/Type: Lehigh Rice
Other Heating: Dad's 1953 EFM Highboy