This instructable make a small portable 12V diesel heater for tent campervan boat
Step 1: The Box
I had a precedent
portable diesel heather it run very well but it is to big and expose a lot of critical, part batteries (it work 24V and need 2 12V batteries series connected), wiring all cable are exposed, exhaust pipe really hot.
So I buy a new 12V parking heater VVKB on amazon it seem to be well silenced, and not so hot at exhaust pipe
Step 2: Boxing
The problem is only insert all, heather, pump, cable wiring, inlet air outlet air in the smallest box possible.
It can work stand (with pipe on side) or turn of 90°degree (with pipe down)
Step 3: Finish
Run silenced outlet air is 60°C and exhaust pipe reach 120°C (not burn paper) really comfortable for camping campervan boat