Thanks for the advice all, as usual! Based on replies, I'm going to pick up a name brand battery operated unit. While it may not be a true "diagnostic tool"; it will at least give me a cross-check point of reference and useful for validation. And I can re-purpose it elsewhere if appropriate.
However while researching models, I came upon this guidance from First Alert on placement - which I found interesting....
"not every spot is ideal. The following spots can create false alarms or prevent your carbon monoxide alarm from properly identifying dangerous CO levels in your home:- Too close to any fuel-burning appliance, at least 10 feet away
- Humid areas like your bathroom
- In direct sunlight
- Places where there’s too much air circulation, like near fans or vents"
Between HVAC vents, bathroom, furnace, water heater, propane refrigerator, generator, etc - is there ANY place in an RV not prone to false alarms? Especially if boondocking?
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