Definitely should be able to. I'd recommend getting a professional to spray closed cell foam insulation. I have a diesel heater. It's hooked up to a heat excha

Definitely should be able to. I'd recommend getting a professional to spray closed cell foam insulation. I have a diesel heater. It's hooked up to a heat exchanger with my engine coolant loop, runs to my hot water heater, also to the forced air fan, and also throughout the entire floor. I laid pex down in the floor so I have floors that I can get up to 80 degrees F. I rarely use the forced air as the diesel heater barely sips fuel and keeps the floors nice and toasty. The advantage of the heated floors in van is that it's a thicker radiant heat, so it heats the cabinets and the walls. Then when you open the door it doesn't let all the heat out.