CO is not much lighter than air and diffuses evenly, it's like an odorless (deadly) fart only the detector can smell. 

Positon CO detector anywhere the air circulates, the closer to you the better.  If it's a combined detector it needs to be low to detect any propane hovering down there.

Stuart

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of Abel Longoria
Sent: Wednesday, January 14, 2015 1:48 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: RECOMENTATIONS ON LP AND CARBON MONNOXIDE DETECTORS

Also.. I must add... Even though this MTI Detector is a LP & CO detector I also opted to ad a separate battery operated CO Detector that you can also get from amazon or home depot etc.

My thinking on the matter...

LP is heavier than air so it will accumulate down low near the floor. I have the MTI detector mounted down low.

CO is lighter than air so it will accumulate up high near the ceiling. I have the separate battery operated CO detector mounted up high next to my stock Westfalia rear speakers.

Some people say there's no need to take this extra step that I've taken but I feel much safer in doing so... definitely worth the extra $20 for a dedicated CO detector up high.

Abel.

On Wed, Jan 14, 2015 at 3:41 PM, Abel Longoria <houstonphotog@gmail.com>
wrote:

> I ordered a Black MTI from Amazon... It's a 12v flush mount LP/CO 
> Detector.
>
> Detector in White:
> http://amzn.to/1yd4Y06
>
> Detector in Black:
> http://amzn.to/1szsJgo
>
>
> more info on it... I installed mine down low on the bench seat kick 
> panel http://dasmotoclub.com/contest-safe-t-alert-giveaway/
>
>
>