hello i have an old propane heater. i might try to put into my tiny teardrop. its vented to outside. it has no fan and no battery power is needed. i wonder if a propane heater for instance the wave 3 will work better for me in 2020. it says for the wave 3 just crack a window. so does the wave 3 have nasty fumes or not. i want dependable heat safe , and not a loud fan that operates with it.