lsayre wrote:whistlenut wrote:Now Larry...there is NO anthratube on an AHS. You are trying to trick this poor Pilgrim!
It's likely that AHS can't legally call their fire tube an anthratube due to copywrite by AA, but the fire tubes in both are similar in function.
Yes...the biggest difference is the auger feed on the AA allows the coal to be added at a "metered" rate. There are other mechanical differences that make the AA a more refined machine in my opinion, but that isn't what the original poster asked about. The bottom line is that each design has its quirks.
As for running through the summer, generally speaking the larger units have less problems overheating..this is due to the "flywheel" effect of storing heat between domestic hot water calls and a higher rate of heat loss to the boiler room (bigger boiler, more surface area, more heat loss).