Spirituallifetime said:
Buy 1 year old van, there should be no more off gasing. You will find some still looking new without the drive off the lot depreciation.
I'm working with over a
decade old van and it's still offgassing. The worst of it does pass after the first year or two, but consider it similar to radiation levels - just because the worst of a radioactive incident is over fairly soon (usually within two weeks) doesn't necessarily mean it's safe/healthy to live in. Exposures are accumulative, I happen to have an illness (MCS) that means I'm on the extreme sensitive end of the spectrum so I've been forced to learn a lot of tips and tricks to reduce exposures in order to have any sort of functional life. For those less sensitive than I, it's all going to be a matter of where your comfort level is at with
how much you expose yourself to vs. cost and effort and such.
Most of the offgassing will be in the upholstery. If you're planning to remove most of the upholstery as part of your conversion, then that would take care of a lot of it.
There's a
product called "Lock-Out" by a company named AFM that is designed to seal the fibers to stop them from outgessing. I'm currently using this on my minivan and should be able to report on efficacy soon. The brand makes a lot of other products designed for less toxic construction that I'd recommend checking out.
Ozone machines (NOT 'air purifiers') work wonders to reduce offgassing, but they risk visibly ageing your interior. I've written about the process
here. The machines are pricey but there are typically places you can rent them from if you'd rather not purchase.
If you're building
over the upholstry (e.g. laying down flooring over the carpet) then far less of it will outgas int your living space. Then whatever you're building with would become a higher factor in your indoor air quality. AFM also sells products to seal plywood from outgassing.
If you want to include an air filter Aereox is far and above the only brand I can wholeheartedly recommend, and I've tried probably nearly all of them. They do make a 12V one. If you go with a different brand you at least want to make sure you don't get one that emits any level of ozone...breathing it ain't good for you.
That's all the advice I've got right now - there's not magic answer, unfortunately, just choosing what's most suitable to you.