A well-insulated 144" Sprinter needs 2,202 W at 14°F. The same van in bare steel needs 7,373 W. Here is the math, the factory fuel tap most owners never find, and the install decisions that cause the most regret.
The same van can need 1,641 W or 5,211 W depending on how it is insulated. Here is the math, the CO safety that actually matters when nobody is in the van, and why a dog van is not built like a camper.
We replaced a 20-year-old heater on a sailing boat with a 2.5KW diesel air heater. Here is the exhaust, fuel line and skin fitting work, part by part, with photos of the actual boat.
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