A huge thank you to all of you that contributed to this tread.
I just finished install of our Espar on our 2020 144.
Started last weekend, had to get some parts and finished this weekend.
If you read this entire thread, watch a couple great videos on youtube for additional reference and do a parts layout on the garage floor, the install is not bad.
I had a Freedom Van Go power in a box that we installed with a complete Adventure Wagon interior package wee put in ourselves. So 2 years ago, I ran one of the wires in the harness to the passenger seat on a 20A fuse in prep for this install. Everything else was done under the passenger seat for this install. The unit is completely separate from the main battery, with some confidence, after being off grid on solar / Battery for long trips and never running short on power for our other van components.
I needed extra exhaust length to reach further back under van to end of running boards and I needed extra 3mm to 5mm adapters to split aux fuel line that was already in use for the HZ9 Fuel-fired heater booster. That also required a couple extra clamps. All mentioned in this thread.
My only regret in the install was the giant S turn in the heat output tubing. I think I could have run that tubing more straight and efficiently to avoid the typical S turn like mentioned above but it is working well!
Creeper is a must. I was under and back to shop table, computer etc so many times that I got a workout!
After install complete, it took 3 cycles to start and then we were putting out heat like a champ!
Again, thank you to all. This and numerous other threads have been very helpful in our Van buildout journey!!