Originally Posted by Hittenstiehl
We posted earlier today our gray tanks were going in and the original ducting from our International Furnace was in the way. We considered modifying the ducting then read the older post where Andy strongly recommends not using the original furnace. We are now considering taking it out entirely and just using a Catalytic Heater. Two Questions:
Q: is a catalytic heater (i.e. Wave 6) enough to heat a 24 ft?
It would be enough to keep an already warm trailer 20-30 degrees warmer than the outside temperature if there is no wind. You have to keep a window open when using catalytic heaters. They pose both safety and humidity problems particularly when used as the only source of heat in colder weather.
Replacements for the existing furnace are readily available. Usually people adapt the Suburban NT series of furnaces, which are available in several sizes. A technician familiar with Airstreams can complete the install in around 2 hours including adaptation of the ductwork and constructing a mounting platform.
Q: if we remove old ducting how important is it to heat/warm the holding tanks?
We live in AZ but can reach freezing and hope to travel but not in the dead of winter.
I don't believe that the ducting to the holding tanks makes much of a difference although since it's the sort of thing that's difficult to determine experimentally without damaging a trailer or two I don't think we really know.