You covered some ground! How was the van? Have any priorities now that you have used it a bit?
Wow! 82mph! What rpm is that....like 3200? My new van I got last week I have not had over 60 mph yet for break in. It seems my new van turns more rpm than my old one ( new van has 3.91 axle). I think my old one had 3.73.That's been my experience with the fuel mileage as well - falls off a cliff above 70. You really can't get around the fact that you're pushing a sail down the highway. I still set the cruise at 82 and don't worry about it. If fuel was the holy grail to me, I'd buy a Prius and stay in tents and hotels - hahaha...!
I will be and I'll do a full step by step write up when I doAre you installing the espar yourself?
I found that my d2 installation amidship required no ducting at all. Perhaps the decent foamed insulation helps. I've got a similar rear bed layout as yours.I will be and I'll do a full step by step write up when I do
Things like "if running more than one duct, use the y-joints backwards because the espar hates back pressure" and "before you select your installation site.. physically do a screen/glow plug replacement so you know what is involved.. then chose your installation site so that you can do this service while it is installed".
All except the protection from the weather are not difficult. I wonder how much protection is required? It will not get rained on but could get water splashing on it. A simple cover could prevent that. My Espar water heater is mounted under the vehicle without any external covers.