Would love to see a photo of your install... My POPUP trailer has the very loud blower setup and Propane super hot furnace setup which works great but is way too much heat for my small foot-print trailer... I have been thinking about the CAT/WAVE unit that has external outside vents. I have posted pictures of this before mounted on the door of one of the floor cabinets...
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This would be a good mod for my particular setup... even one of those HYDRONIC setups using a small hot water flow heaters using the six gallon hot water heater for source would work good for me as well... We would just like enough heat to keep everything above freezing and love crawling into under the bed covers at night haha...
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Our backup heater is one of the MR BUDDY heaters using one of those 1lb canisters. We only use this with proper venting and never have it on after we go to sleep... Would like to get away from one of these...
Roy Ken