*What you should worry about is the airborne soot particles that you can't see with the naked eye.*
it is the evidence i see.the witness plates . the *stains * on the roofing .. the deposition on my interior walls . the collection on my filtration systems ,
on the air handler i run a prefilter on the air returns ,a late type electrostatic [trane] filter . and then a high filtration particulate filter. ..
one can not see the soot . only the collected evidence on the filters .. it all turns *BLACK* real fast
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