I have that same 12v detector... It works really well.

I installed mine on the bench seat kick panel down low near the AC wall
plug.

http://dasmotoclub.com/wp-content/uploads/2014/04/vanagon_kick_plate-13.jpg

Install article here if someones interested:
http://dasmotoclub.com/vanagon-kick-plate-overhaul/

One thing to note... Yes this detector is for LP and Carbon Monoxide but I
still installed a standalone battery operated Kiddie Carbon Monoxide
detector from Home Depot in the van too. I treat this 12v LP/CO detector as
a standalone LP detector. Here's why...

LP is heavier than air so it tends to gather down low, I mounted the LP
Detector near the floor.

CO is lighter than air so it tends to gather up high, I mounted a separate
CO Detector up high next to my rear speakers.

I've had the CO detector up high go off with LP/CO detector down low not
picking up the the scent at all. This was a controlled test once both items
were installed in order to make sure they were operational.

I highly recommend getting covering all your bases and having 2 separate
detectors to monitor each dangerous gas separately. There's nothing wrong
with being too cautious when the alternative outcome can be fatal.

Abel
DasMotoClub.com

On Sun, Jan 4, 2015 at 12:27 AM, Dennis Haynes <d23haynes57@hotmail.com>
wrote:

> For a permanent type installation with only 12 volt available.
>
>
> http://www.campingworld.com/shopping/item/35-series-dual-lp-carbon-monoxide-alarm-black/70012
>
> Dennis
>
>
>