I don't think I would like doing that... The fumes (if any) will be drawn right into the WAVE 3 open flame/red hot core for sure.
I also would not like the idea of portable hoses laying on the floors or running through the windows etc taking all of the abuse that will come from that.
Sounds like an overall bad idea all the way around to me.
The MR BUDDY type heater (LOWES-Camp stores) that runs off of screw-on 1LB propane canisters to me might be alot safer with everything self contained... We used these all the time when tent camping and this is also our heat back-up plan for our off-road POPUP camper. Have used the MR BUDDY in the POPUP TRAILER with cracked open windows a few times...
I hate the burned PROPANE smell that comes off these type of heaters as well as the trailer built-in PROPANE furnace... Certainly is NOT clean heat like being developed from a HOT WATER based car heater haha...
Just me yaking
Roy Ken