Flexible Heater Ducting
I have never liked the flexible heater duct material. I know it's the cheapest and quickest way to install ducting but it is also very inefficient. The flow coefficient is just lousy and if it could b...
Forum Discussion
RV furnaces do not start out with the most robust fans but I doubt that changing the duct work to a rigid smooth type is going to "improve" the air flow.
Part of the issue is the limited amount of heat from the burner. The fan is chosen to give a compromise of air flow vs temperature rise.
If you moved more air the temp rise will be to low and all you feel is a very cold draft.
Move not enough air and you get to much temp rise and then risk overheating the furnace.
The higher BTU the furnace the more air the fan will move, the drawback there is the more air moved by the fan the higher the 12V current draw of the fan.
Part of the issue is the limited amount of heat from the burner. The fan is chosen to give a compromise of air flow vs temperature rise.
If you moved more air the temp rise will be to low and all you feel is a very cold draft.
Move not enough air and you get to much temp rise and then risk overheating the furnace.
The higher BTU the furnace the more air the fan will move, the drawback there is the more air moved by the fan the higher the 12V current draw of the fan.
