Your right the furnace is noisy but livable with, thanks for the insulation tip. I was looking for something to work I was going to see if that star foam insulation, i beleive it is blue comes in several thicknesses and can be cut and fitted around pipes, etc. Thinking of insulated as much of the camper as possible. What we have found somewhat in- torerable is the AC, it is so loud that you can't hear yourself speak or here tv.
2004 T189 fbr
2006 Dodge ram 1500 5.7 hemi
2004 Jeep Liberty 4x4 (have not tried yet, anyone have any experience here?)