Any cleaner that uses a HEPA (high efficiency particulate arresting) filter
will be about as good as you can get when it comes to dust removal. HEPA
filters are 99.97% efficient at removing dust down to the smallest
particles. So after checking for a HEPA filter you want to check out other
features like volume of air moved, cost of filters, noise, construction
quality, etc. A pre-filter ahead of the HEPA filter will make it last
longer.
Some of these units may have charcoal filters to remove odours. These may
work for a while but eventually their capacity will be used up. Some units
have ionizers and I don't know if these help much over and above the HEPA
filter. If dust is your only issue I would suggest getting the largest HEPA
equipped unit that fits your boat. A large unit run at low speed may move
as much air as a small unit running at max and be much quieter. When you
are away you can run it at max speed and really do a cleanup.

"beaufortnc" wrote in message
ups.com...
I'm just full of questions today,

Can anyone recommend a good air purifier/cleaner/filter that runs on
12v?

Mostly I'm interested in removing the dust from the air. We don't
smoke, so that's not such a big deal, but it would be nice if the
device could kill odors too,

Thanks,

Mike.