Hey guys

I'm about to install this multi gas detector in our westy and I'm having
second thoughts about installing it on the floor board of the rear bench.
Here's why. The device detects propane, methane and carbon monoxide. Carbon
monoxide is lighter than air and will rise, propane will do the opposite.
Thus, this location would be good for propane detection but poor for carbon
monoxide and the opposite for installing it higher up.

OR, am I over thinking this because the tiny space of a westy (80sqft)
would fill up rather quickly anyways?

Thoughts?

Thanks,

Jared