let me start by saying that there is alot of information out there on HBT about both of these systems. I 'think' i have read most of it over the past couple of weeks. i do have a ? about the reason for choosing one over the other.
I have a brew tree (3 tier all gravity feed), all keggels, the MT and BK have false bottoms in them.
i really want to build a single tier with a pump (maybe 2) but 1 to start. my ? is this--HERMS i would need to pump my wort from the MT through a HEX that is in the HLT and back into the MT. with direct fire MT i would have to recirculate the wort with a pump to prevent scortching.
Direct fire seems much easier.... so i'm not sure why people go with the HERMS. is it because, down the line, when i want to automate, it is easier to have 1 furnace/ pilot valve on the HLT and not need 1 also for the MT?
thx for all of your help, as you can tell, i need it