Furnaces. Very inefficient!
Seems to me that the furnaces in rv's are patheticly inefficient. There are natural gas house furnaces that are so good that the exhausts are plastic!
Forum Discussion
The problem isn't efficiency so much as practicality.
An RV of any flavour is a relatively small space, that means you're never going to be far from the furnace. So noise will be a consideration.
But more importantly electrical power demand while off-grid.
To achieve higher efficiency would require a much longer burn at lower BTU rates and a power venting motor to push the heated air through the more complex heat exchanger. So now you have 2 blowers running (albeit one much smaller) and running for much longer periods.
Furnaces are already big power hogs, I couldn't imagine the extra battery capacity you would need to go this route.
An RV of any flavour is a relatively small space, that means you're never going to be far from the furnace. So noise will be a consideration.
But more importantly electrical power demand while off-grid.
To achieve higher efficiency would require a much longer burn at lower BTU rates and a power venting motor to push the heated air through the more complex heat exchanger. So now you have 2 blowers running (albeit one much smaller) and running for much longer periods.
Furnaces are already big power hogs, I couldn't imagine the extra battery capacity you would need to go this route.
