I think the new furnace is about the same heat output - just twice the electrical consumption. My 2016 uses the Atwood 8012-II furnace - 12000 BTU/h input, 1.8A current draw (it is actually more like 1.5A on mine): https://www.vintaget...flamemanual.pdf
The new Dometic replacement is this one (I think) also 12000 BTU/h but at 3.4A current draw:
The inrush current is the initial current spike needed to start up the blower motor or charge the ignitor. This is what pops the fuse, the average current is much lower (3.4A).
Thanks...very informative...still wondering why FWC went to a furnace that uses twice the amps for same BTUs....but as the old saying goes: "I got mine"!