Has anybody mounted the Propex 2211 externally? (the 2211 is the external version of the 2000). The website says it needs a "bed box". Not sure what that is or whether it is included. I am waiting to hear back from them. I am thinking of mounting the 2211 on the back of my FW Fleet in order to save some cabinet space. Any thoughts about this mounting location? (to the right of the back door). I'm going to check out the Truma as well. There is a good chance I will end up installing the furnace in the cabinet space inside. I wonder if FWC would send me all the install hardware? I already have a propane system installed - just no furnace.
I think you may find that Truma only sells their products through their dealer network, who would also do their installs. I might be wrong but I don't think you can do a DIY Truma install.
When you are considering the Propex heaters and your possible areas for an install, keep in mind that there are two separate sets of flexible pipe (one exhaust and one air intake) about a meter long, that have to be routed from the bottom of the heater to the outside of your unit. The length as received must not be changed. Now this pipe is quite flexible but you have to be really careful (and you are alerted to this in the install instructions) about very sharp corners and especially, kinks in the pipe which will affect performance and/or safety. If the air/exhaust flow is not to the liking of the unit, it will lock you out until you resolve the issue. This is of course a safety override feature, one which I really like.
People who are putting these units on the floor like in a van or box camper, find it is easy to find the room to thread the piping before it exits or just punch some holes in the floor and run it straight down. With a slide in camper you are a bit more cramped and you don't have the luxury of going through the floor so you probably will have to be a bit more imaginative in the threading of the air intake and exhaust, prior to having them exit to the outside.